SGP/EBBR/E26 - Temperature from Left T/RH Probe Incorrect

The temperature from the left T/RH probe went offscale frequently.  This
temperature is used in the calculation of the vapor pressure.  Therefore,
top and bottom Thum measurements, left Thum, top and bottom vapor pressure 
measurements, vapor pressure gradients, and the resulting latent and 
sensible heat fluxes and bowen ratio were frequently incorrect for the 
period stated.

• vapor_pressure_bottom
• temp_trh_top
• bowen_ratio
• latent_heat_flux
• temp_trh_bottom
• vapor_pressure_top
• sensible_heat_flux

• temp_trh_left_rr

• temp_trh_top
• temp_trh_bottom
• vapor_pressure_bottom
• vapor_pressure_top

SGP/EBBR/E26 - Left T/RH Probe Temperature Data Incorrect

Left T/RH probe temperature is frequently offscale during the period.
Examine the data (compare with the the T/RH right temperature) to determine
which times are incorrect.  Replacement of the probe on 29 June 1999 
solved the problem.

Affected data are:

5 minute:  tair_bot, tair_top
15 minute: tair_l
30 minute: tair_bot, tair_top, e, h, bowen

• temp_air_bottom
• bowen_ratio
• latent_heat_flux
• temp_air_top
• sensible_heat_flux

• temp_air_left

• temp_air_top
• temp_air_bottom

SGP/EBBR/E26 - Right Aspirator Not Working

The right aspirator fan did not work during the period.

The following values were therefore incorrect:

5 minute:  tair_top, tair_bot, thum_top. thum_bot, hum_top, hum_bot,
           vp_top, vp_bot
15 minute: rr_thum_l, mv_hum_l, tair_l
30 minute: tair_top, tair_bot, thum_top. thum_bot, hum_top, hum_bot,
           vp_top, vp_bot, e, h, bowen

• temp_air_bottom
• temp_trh_top
• bowen_ratio
• rh_top_fraction
• rh_bottom_fraction
• latent_heat_flux
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top
• sensible_heat_flux
• vapor_pressure_bottom

• rh_left_mv
• temp_trh_left_rr
• temp_air_left

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom

SGP/EBBR/E26 - Anemometer Not Working, Wind Speed Incorrect

The anemometer was not working during this period.

The following values were therefore incorrect:

5 minute:  wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/26 - Low Battery Condition

When battery voltage was less than 10.4 V DC during this period, all
data should be considered to be incorrect.  The cause of the problem
was a broken trace on J-panel #3.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• lon(lon)
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• lat(lat)
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• Time offset of tweaks from base_time(time_offset)
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Dummy altitude for Zeb(alt)
• Barometric Pressure(atmos_pressure)
• base time(base_time)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_heat_flow_3_mv
• soil_temp_1_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• lon(lon)
• soil_temp_3_rr
• soil_moisture_4_r
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• lat(lat)
• temp_air_left
• Dummy altitude for Zeb(alt)
• rh_right_mv
• soil_moisture_3_r
• home_signal
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• Time offset of tweaks from base_time(time_offset)
• soil_moisture_5_r
• base time(base_time)
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• lon(lon)
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• Time offset of tweaks from base_time(time_offset)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• Dummy altitude for Zeb(alt)
• vapor_pressure_top
• net_radiation
• lat(lat)
• base time(base_time)

SGP/EBBR/E26 - Net Radiation Incorrect

The net radiometer top dome was broken and water had entered.  Net 
radiation values are therefore incorrect during the period.

The affected data are:

5 minute:  q
15 minute: mv_q
30 minute: q, h, e

• latent_heat_flux
• net_radiation
• sensible_heat_flux

• net_radiation_mv

• net_radiation

SGP/EBBR/E26 - Reprocess Soil Moisture Off-Scale

During numerous periods within the days listed above, individual soil
moisture probes indicate small positive or else negative values when
soil moisture is high (greater than 35%).  This situation has occured
since the present EBBR unit was installed on 17 July 1996.  The cause
of the problem is inadequate range in the calibration curve equation.
Cement soil is somewhat unique amongst the EBBR sites, as the soil is
very sandy and porous; it can hold a larger amount of water per volume
than the other soils.  This high a soil moisture cannot be obtained with
the calibration soil used by REBS.  Therefore, the soil moisture equations
need to be manipulated to allow larger soil moistures to be calculated.
Much of the data from January 1998 is corrupted by this problem,
making changes in the equations prudent.

The soil moisture data must be inspected by the data user to see when
soil moisture values for one or more probes is inconsistent with the
others.

Recalculation of ave_shf, e, and h must be made using only the soil
moisture sets with correct soil moisture values.
Affected data values are (# for probe number):

15 minute: rr_sm#

30 minute: sm#, c_shf#, cs#, ces#, g#, ave_shf, e, h

Sensible, latent, and soil heat fluxes can be recalculated using the soil
probe sets that provide correct data.  For example, if soil moisture 2 is
incorrect,

ave_shf = (g1 + g3 + g4 + g5)/4

e = -(q + ave_shf)/(1 +bowen)

h = -(e + ave_shf +q),


If soil moisture 2 and 4 are incorrect,

ave_shf = (g1 + g3 + g5)/3

e = -(q + ave_shf)/(1 +bowen)

h = -(e + ave_shf +q),


If soil moisture 2, 4, and 5 are incorrect,

ave_shf = (g1 + g3)/2

e = -(q + ave_shf)/(1 +bowen)

h = -(e + ave_shf +q),

etc.

On 5 May 1998 at 1815 GMT a calibration coefficient was changed in the CR10
program as a result of a BCR by the mentor.  This coefficient has helped
reduce the least severe problems but has not eliminated problems from
large negative soil moistures measured even once during the integration
period.  However, now the incorrect average soil heat flow, latent heat
flux, and sensible heat flux are so large, negative or positive, that they
cannot be mistaken as being correct. 

The EBBR unit was replaced with a recalibrated system on 1 April 1999.
The previous unit experienced soil moisture problems the entire time
(almost 3 years) that the system was installed because of the inadequacy
of the soil moisture sensor calibrations.

• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_heat_capacity_5
• soil_moisture_2
• soil_heat_capacity_4
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_5

• soil_moisture_1_r
• soil_moisture_5_r
• soil_moisture_3_r
• soil_moisture_2_r
• soil_moisture_4_r

SGP/EBBR/E26 - EBBR E26 Left Aspirator Not Working

The data is suspect because of inadequate aspiration for the sensors
in the left aspirated radiation shield.

• temp_air_bottom
• temp_trh_top
• bowen_ratio
• rh_top_fraction
• rh_bottom_fraction
• latent_heat_flux
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top
• sensible_heat_flux
• vapor_pressure_bottom

• rh_left_mv
• temp_trh_left_rr
• temp_air_left

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom

SGP/EBBR/E26 - EBBR E26 All Data Incorrect

All data was incorrect for an unknown reason.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_heat_flow_3_mv
• soil_temp_1_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_4_r
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• home_signal
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - All Data Incorrect

All data wqas incorrect for an unknown reason.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_heat_flow_3_mv
• soil_temp_1_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_4_r
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• home_signal
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - All Data Incorrect

Data was incorrect because of Preventative Maintenance activities.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_heat_flow_3_mv
• soil_temp_1_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_4_r
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• home_signal
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data

Battery voltage below about 10.5 volts DC caused a number of the
EBBR sensors to not measure correctly.

• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1
• home_signal_30
• home_signal_15
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• sensible_heat_flux
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_5

• soil_heat_flow_4_mv
• soil_temp_4_rr
• soil_temp_5_rr
• soil_heat_flow_5_mv
• soil_heat_flow_2_mv
• soil_temp_3_rr
• home_signal
• soil_temp_2_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_heat_flow_1_mv

• home_signal

SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data

Battery voltage less than 10.5 volts DC causes some
sensors to measure incorrectly.

• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1
• home_signal_30
• home_signal_15
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• sensible_heat_flux
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_5

• soil_heat_flow_4_mv
• soil_temp_4_rr
• soil_temp_5_rr
• soil_heat_flow_5_mv
• soil_heat_flow_2_mv
• soil_temp_3_rr
• home_signal
• soil_temp_2_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_heat_flow_1_mv

• home_signal

SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data

Battery voltage less than 10.5 volts DC causes
some sensors to measure incorrectly.

• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1
• home_signal_30
• home_signal_15
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• sensible_heat_flux
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_5

• soil_heat_flow_4_mv
• soil_temp_4_rr
• soil_temp_5_rr
• soil_heat_flow_5_mv
• soil_heat_flow_2_mv
• soil_temp_3_rr
• home_signal
• soil_temp_2_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_heat_flow_1_mv

• home_signal

SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data

Battery voltage less than 10.5 volts DC causes
some sensors to make incorrect measurements.

• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1
• home_signal_30
• home_signal_15
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• sensible_heat_flux
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_5

• soil_heat_flow_4_mv
• soil_temp_4_rr
• soil_temp_5_rr
• soil_heat_flow_5_mv
• soil_heat_flow_2_mv
• soil_temp_3_rr
• home_signal
• soil_temp_2_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_heat_flow_1_mv

• home_signal

SGP/EBBR/E26 - All Data Incorrect

All data was incorrect for an unknown reason.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_heat_flow_3_mv
• soil_temp_1_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_4_r
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• home_signal
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - All Data Incorrect

All data was incorrect for an unknown reason.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_heat_flow_3_mv
• soil_temp_1_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_4_r
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• home_signal
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - Left Air Temperature Periodically Incorrect

Left air temperature periodically was incorrect, causing the indicated measurements
to be incorrect.  The user will need to inspect the data to see when the left air
temperature was incorrect (compare left with right air temperature or with the
humidity probe temperature).

• temp_air_bottom
• bowen_ratio
• latent_heat_flux
• temp_air_top
• sensible_heat_flux

• temp_air_left

• temp_air_top
• temp_air_bottom

SGP/EBBR/E26 - Reference Temperature Incorrect

The reference temperature sensor did not work during the indicated period,
causing the indicated measurements to be incorrect.

• temp_air_bottom
• bowen_ratio
• latent_heat_flux
• temp_air_top
• temp_reference
• sensible_heat_flux

• temp_air_right
• temp_reference_rr
• temp_air_left

• temp_air_top
• temp_air_bottom
• temp_reference

SGP/EBBR/E26 - Electronics Problem

Incorrect home signal indicates an electronic problem that affected the indicated
measurements; this may have been a multiplexer #2 problem as all sensors affected 
are connected to that multiplexer and no sensors on multiplexer #1 were affected.

• temp_air_bottom
• surface_soil_heat_flux_avg
• net_radiation
• temp_air_top
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• bowen_ratio
• home_signal_30
• home_signal_15
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_flow_1
• soil_heat_flow_5
• soil_heat_flow_4
• sensible_heat_flux
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5

• soil_heat_flow_4_mv
• soil_heat_flow_5_mv
• temp_air_left
• temp_reference_rr
• soil_heat_flow_2_mv
• home_signal
• temp_air_right
• soil_heat_flow_3_mv
• soil_heat_flow_1_mv
• net_radiation_mv

• home_signal
• temp_air_top
• temp_air_bottom
• temp_reference
• net_radiation

SGP/EBBR/E26 - Soil Heat Flow #5 Incorrect

Soil Heat Flow #5 was incorrect, causing the indicated measurements to be incorrect.

• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_5
• soil_heat_flow_5
• corr_soil_heat_flow_5
• sensible_heat_flux

• soil_heat_flow_5_mv

SGP/EBBR/E26 - Soil Heat Flow #1 Incorrect

Soil Heat Flow #1 was incorrect, causing the indicated measurements to be incorrect.
A broken sensor wire was at fault.

• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_1
• soil_heat_flow_1
• corr_soil_heat_flow_1
• sensible_heat_flux

• soil_heat_flow_1_mv

SGP/EBBR/E26 - Soil Heat Flow #2 Large Negative

Soil Heat Flow #2 was large negative and incorrect for an unknown reason.

• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_2
• soil_heat_flow_2
• corr_soil_heat_flow_2
• sensible_heat_flux

• soil_heat_flow_2_mv

SGP/EBBR/E26 - Left Air Temperature Incorrect

Incorrect left air temperature caused the indicated measurements to be incorrect.

• temp_air_bottom
• bowen_ratio
• latent_heat_flux
• temp_air_top
• sensible_heat_flux

• temp_air_left

• temp_air_top
• temp_air_bottom

SGP/EBBR/E26 - Wind Speed Iced

The anemometer was frozen stopped by freezing rain.  Indicated data are incorrect.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP EBBR E26 - Data Suspect, Low Battery Voltage

The data measurements are suspect because of low battery voltage.
Some measurements may be correct, but most are probably incorrect.
Large home signals indicate very low battery voltage is present.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_4_r
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

• null(Raw data stream - documentation not supported)

SGP EBBR E26 - All Data Incorrect

All data was incorrect during these periods for unknown reasons.
However, this tends to happen during preventative maintenance
visits if sensors have to be changed out or tested and the 
datalogger program is reloaded, or if the battery voltage is low.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_4_r
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

• null(Raw data stream - documentation not supported)

SGP EBBR E26 - Soil Heat Flow #1 Incorrect

Soil Heat Flow #1 was incorrect because of a bad electronic
connection.  Average surface heat flow, sensible heat flux, and
latent heat flux are incorrect as a result; these can be re-calculated 
by using the remaining correct soil heat flows.

• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_1
• soil_heat_flow_1
• corr_soil_heat_flow_1
• sensible_heat_flux

• soil_heat_flow_1_mv

SGP EBBR E26 - Soil Heat Flow #2 Incorrect

Soil Heat Flow #2 was incorrect.  Average soil heat flow, 
sensible heat flux, and latent heat flux were therefore also
incorrect; these can be re-calculated from the remaining 
correct soil heat flows.

• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_2
• soil_heat_flow_2
• corr_soil_heat_flow_2
• sensible_heat_flux

• soil_heat_flow_2_mv

SGP EBBR E26 - Soil Heat Flow #3 Incorrect

Soil heat Flow #3 was incorrect (large negative).  Therefore
average soil heat flow, sensible heat flux, and latent heat flux were
also incorrect; these can be re-calculated using the remaining
correct soil heat flows.

• surface_soil_heat_flux_avg
• latent_heat_flux
• soil_heat_flow_3
• corr_soil_heat_flow_3
• surface_soil_heat_flux_3
• sensible_heat_flux

• soil_heat_flow_3_mv

SGP EBBR E26 - Soil Moisture #1 Incorrect

Soil Moisture #1 was a constant 33.7 and was incorrect.

Latent and Sensible Heat fluxes were normally minimally affected.

• surface_soil_heat_flux_avg
• soil_heat_capacity_1
• latent_heat_flux
• surface_soil_heat_flux_1
• soil_heat_flow_1
• corr_soil_heat_flow_1
• soil_moisture_1
• sensible_heat_flux

• soil_moisture_1_r
• soil_moisture_1_rr

SGP EBBR E26 - AEM Inbetween, Data Incorrect

While the AEM was inbetween the correct measurement positions the measurements from the 
two levels were incorrect.

The sensible and latent heat fluxes and Bowen ratio were therefore incorrect also.

• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• rh_bottom_fraction
• latent_heat_flux
• sensible_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom

• rh_left_mv
• temp_trh_left_rr
• temp_air_left
• temp_trh_right_rr
• rh_right_mv
• temp_air_right

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• temp_air_bottom
• rh_top_fraction
• rh_bottom_fraction
• vapor_pressure_top
• vapor_pressure_bottom

SGP EBBR E26 - Soil Heat Flow #5 Incorrect

Soil Heat Flow #5 was large negative during this period.

Therefore, calculated average soil heat flow, latent heat flux, and sensible heat flux 
were incorrect.  These measurements can be recalculated from the use of measurements from 
only soil heat flow sensors #1-4.

• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_5
• soil_heat_flow_5
• corr_soil_heat_flow_5
• sensible_heat_flux

• soil_heat_flow_5_mv

SGP EBBR E26 - Some Data Incorrect

The reference temperature sensor malfunctioned, causing all associated measurements to be 
incorrect.

• temp_air_bottom
• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• temp_air_top
• energy_storage_change_5
• temp_trh_bottom
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• temp_trh_top
• bowen_ratio
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• soil_temp_5
• soil_temp_4
• soil_temp_3
• soil_temp_2
• soil_temp_1
• vapor_pressure_top
• sensible_heat_flux
• vapor_pressure_bottom
• temp_reference

• soil_temp_4_rr
• soil_temp_5_rr
• temp_air_left
• temp_reference_rr
• soil_temp_3_rr
• soil_temp_2_rr
• temp_air_right
• soil_temp_1_rr

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• temp_air_bottom
• vapor_pressure_top
• temp_reference
• vapor_pressure_bottom

SGP EBBR E26 - Some Data Incorrect

Since soil temperature was not available for the previous half hour, soil energy storage 
could not be calculated properly for the indicated period.  The individual soil heat 
storage from the five soil sets, average soil heat flow, sensible heat flux, and latent heat 
flux are therefore incorrect.

• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• latent_heat_flux
• energy_storage_change_3
• energy_storage_change_4
• surface_soil_heat_flux_2
• energy_storage_change_5
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4

SGP EBBR E26 - Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_heat_flow_2
• soil_temp_3
• soil_heat_flow_1
• soil_temp_2
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• soil_temp_3_rr
• soil_moisture_4_r
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• soil_moisture_3_rr
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP EBBR E26 - Low Battery Voltage

During the indicated the period the battery voltage often dropped 
to 10.4 volts or below.  At voltages less than 10.5 volts none of
the selected measurements can be considered to be correct.  The battery
charging capacity was insufficient to maintain voltage at night.

If the battery voltage is less than 10.5 volts (see battery voltage in the
15 minute data files), do not use the data.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• soil_temp_3_rr
• soil_moisture_4_r
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP EBBR E26 - Battery Voltage Low

The battery voltage often dropped below 10.5 volts. 

All data for voltages below 10.5 volts should be considered to be incorrect.

See the 15 minute data files, which contain the battery voltage, to 
determine when the data was incorrect.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• soil_temp_3_rr
• soil_moisture_4_r
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_r
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_moisture_5_r
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - 3-month Check

During EBBR 3 month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units can be
placed at the same height.  The measurements during this period, at least,
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h),
or latent heat flux (e), nor do the air temperature and relative humidity
measurements indicate gradients.  Checks performed before or after the AEM
is disabled also lead to some incorrect data.

• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• rh_bottom_fraction
• latent_heat_flux
• sensible_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom

• rh_left_mv
• temp_trh_left_rr
• temp_air_left
• temp_trh_right_rr
• rh_right_mv
• temp_air_right

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• temp_air_bottom
• rh_top_fraction
• rh_bottom_fraction
• vapor_pressure_top
• vapor_pressure_bottom

SGP/EBBR/E26 - 6 Month Checks

The indicated measurements were incorrect during the 6 month checks.

• temp_air_bottom
• temp_trh_top
• bowen_ratio
• rh_top_fraction
• rh_bottom_fraction
• latent_heat_flux
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top
• sensible_heat_flux
• vapor_pressure_bottom

• temp_air_right
• temp_air_left

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom

SGP/EBBR/E26 - Measurements Zero

The measurements are often zero after a CR10 datalogger restart, as occurred here.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

• null(Raw data stream - documentation not supported)

SGP/EBBR/E26 - Measurements Incorrect

Change of energy storage (CES) measurements (calculated from the change of soil 
temperature with time) are sometimes incorrect after a CR10 program restart because the beginning 
measurement of the averaging period is zero.  

Average soil heat flow, sensible heat flux, and latent heat flux were affected and cannot 
be recalculated.

• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• latent_heat_flux
• energy_storage_change_3
• energy_storage_change_4
• surface_soil_heat_flux_2
• energy_storage_change_5
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4

SGP/EBBR/E26 - Multiplexer 2 Failure From High Temperature

Multiplexer 2 is failing during times of control box temperatures above 29 degrees C.  The 
failure begins in the last channel and progresses to lower channels as the temperature 
increases.  It has not yet been determined whether the failure is in the relays or a solid 
state component of the multiplexer.  This condition is probably due to the aging of the 
device and the millions of cycles that this 10 year old device has made.  More failures 
of this sort may occur in the future.  A cure is being sought aside from replacement of 
the multiplexers to prevent the problem.

The indicated measurements need to be inspected to determine which ones are usable.

• temp_air_bottom
• surface_soil_heat_flux_avg
• bowen_ratio
• latent_heat_flux
• temp_air_top
• soil_heat_flow_3
• soil_heat_flow_5
• vapor_pressure_top
• soil_heat_flow_4
• sensible_heat_flux
• vapor_pressure_bottom
• surface_soil_heat_flux_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• corr_soil_heat_flow_5

• temp_air_right
• temp_air_left

• temp_air_top
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom

SGP/EBBR/E26 - Annual Calibration Changeout

On 16 November 1996 the EBBR changeout for annual calibration occurred at 
E26, Cement, OK.  SEBS unit 2 was removed and unit 8 was installed.  
Data for half hours 1400 and 1430 GMT on 17 November is 
incorrect; 3 month calibration checks were being performed.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• lon(lon)
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• lat(lat)
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• Time offset of tweaks from base_time(time_offset)
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Dummy altitude for Zeb(alt)
• Barometric Pressure(atmos_pressure)
• base time(base_time)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_2_r
• soil_heat_flow_3_mv
• soil_temp_1_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• lon(lon)
• soil_temp_3_rr
• soil_moisture_4_r
• soil_heat_flow_1_mv
• soil_moisture_1_r
• soil_temp_4_rr
• temp_trh_left_rr
• lat(lat)
• temp_air_left
• Dummy altitude for Zeb(alt)
• rh_right_mv
• soil_moisture_3_r
• home_signal
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• Time offset of tweaks from base_time(time_offset)
• soil_moisture_5_r
• base time(base_time)
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• lon(lon)
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• Time offset of tweaks from base_time(time_offset)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• Dummy altitude for Zeb(alt)
• vapor_pressure_top
• net_radiation
• lat(lat)
• base time(base_time)

SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR 
Header

The units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in the 
EBBR 30 minute netcdf header have been incorrect from the beginning 
of processing the data into netcdf files.  The correct units are 
MJ/m^3/C.

This does not affect the data quality.

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_5
• soil_heat_capacity_4

• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_1

• soil_heat_capacity_1
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• soil_heat_capacity_2

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_5
• soil_heat_capacity_3
• soil_heat_capacity_4

• soil_heat_capacity_5
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_capacity_4
• soil_heat_capacity_3

• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_4
• soil_heat_capacity_5
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1

• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5
• soil_heat_capacity_1

• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_1

SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR 
Header

The units for Soil Heat Capacity (cs1, cs2, cs3, cs4,
cs5) in the EBBR 30 minute netcdf header have been 
incorrect from the beginning of processing the data
into netcdf files.  The correct units are MJ/m^3/C.
   
This does not affect the data quality.

(NOTE: The actual begin date of some of these data streams
 is as early as 7/4/93.  This DQR applies to all 30m EBBR
 data.)

• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_5
• soil_heat_capacity_3
• soil_heat_capacity_4

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_1

• soil_heat_capacity_1
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• soil_heat_capacity_2

• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_1

• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5
• soil_heat_capacity_1

SGP/EBBR/E26 - Data Incorrect during 6 month checks

Some of the measurements are incorrect during the 6 month checks.

• temp_air_bottom
• temp_trh_top
• bowen_ratio
• rh_top_fraction
• rh_bottom_fraction
• latent_heat_flux
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top
• sensible_heat_flux
• vapor_pressure_bottom

• temp_air_right
• temp_air_left

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom

SGP/EBBR/E26 - Measurements zero following logger restart

Most of the measurements were zero, which normally happens after a 
datalogger restart.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - Multiplexer Problem

One of the multiplexers exhibited dropouts of the channels, beginning
with the last channel at temperatures above about 30 C and moving backward
through the channels as the temperature rose. High temperatures affected the
switching speed of the multiplexer.  This is the first time that this behavior has been 
documented in a Campbell Scientific multiplexer. The multiplexer had
been in continuous field use for 10 years and had experienced probably more
switching cycles than what is normally expected of the device in that period.

The multiplexer was replaced to solve the problem.

• temp_air_bottom
• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_2
• temp_air_top
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• surface_soil_heat_flux_3
• corr_soil_heat_flow_2
• surface_soil_heat_flux_4
• corr_soil_heat_flow_1
• corr_soil_heat_flow_5

• temp_air_right
• temp_air_left

• temp_air_top
• temp_air_bottom

SGP/EBBR/E26 - Water in broken Net Radiometer Dome

The net radiation measurement is incorrect. Measurements 
calculated using net radiation are also incorrect.  

No work-around is possible for this situation.

• latent_heat_flux
• net_radiation
• sensible_heat_flux

• net_radiation

SGP/EBBR/E26 - Battery Voltage Low

When Battery Voltage drops below 10.5 volts, most 
measurements are suspect and some are often incorrect.

The user will need to inspect the data carefully to 
determine the useability of the data.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• soil_moisture_5
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - AEM Hung

The AEM hung inbetween home positions during the period.  The Bowen ratio, gradient 
measurements, sensible heat flux, and latent heat flux are incorrect.

• temp_air_bottom
• temp_trh_top
• bowen_ratio
• rh_top_fraction
• rh_bottom_fraction
• latent_heat_flux
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top
• sensible_heat_flux
• vapor_pressure_bottom

• temp_air_right
• temp_air_left

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom

SGP/EBBR/E26 - Data zeros following logger restart

Most measurements were zero after restart of the CR10 datalogger,
after a calibration changeout of the EBBR unit.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - Left Air Temperature Incorrect

The left air temperature was incorrect during the period.  Poor electronic
connections may have caused this.

• temp_air_bottom
• vapor_pressure_bottom
• bowen_ratio
• latent_heat_flux
• temp_air_top
• vapor_pressure_top
• sensible_heat_flux

• temp_air_left

• vapor_pressure_bottom
• temp_air_top
• temp_air_bottom
• vapor_pressure_top

SGP/EBBR/E26 - E26 EBBR Soil Heat Flow #1 Incorrect

Soil Heat Flow #1 was incorrect much of the time.

The sensor was replaced.

• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_1
• soil_heat_flow_1
• corr_soil_heat_flow_1
• sensible_heat_flux

• soil_heat_flow_1_mv

SGP/EBBR/E26 -Right Air Temperature Incorrect

One of the Right Air Temperature connections was loose, producing incorrect data.

• temp_air_bottom
• bowen_ratio
• latent_heat_flux
• temp_air_top
• sensible_heat_flux

• temp_air_right
• temp_air_left

• temp_air_top
• temp_air_bottom

SGP/EBBR/E26 -  6 Month Checks

Many measurements were incorrect while the AEM was positioned with both aspirators at the 
same height for comparison checks.

• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• rh_bottom_fraction
• latent_heat_flux
• sensible_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom

• rh_left_mv
• temp_trh_left_rr
• temp_air_left
• temp_trh_right_rr
• rh_right_mv
• temp_air_right

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• temp_air_bottom
• rh_top_fraction
• rh_bottom_fraction
• vapor_pressure_top
• vapor_pressure_bottom

SGP/EBBR/E26 - Soil Heat Flow #5 Large Positive

Soil Heat Flow #5 was large positive for these two periods, for
an unknown reason.

• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_5
• soil_heat_flow_5
• corr_soil_heat_flow_5
• sensible_heat_flux

• soil_heat_flow_5_mv

SGP/EBBR/E26  - Soil Storage Incorrect; Surface Fluxes Incorrect

The half hour after restart of the CR10 datalogger, the soil temperatures for the 
beginning of the period are missing.  Therefore the soil energy storage and surface flux values 
are also incorrect.

• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• latent_heat_flux
• energy_storage_change_3
• energy_storage_change_4
• surface_soil_heat_flux_2
• energy_storage_change_5
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4

SGP/EBBR/E26 - AEM Home Signals Incorrect, Surface Fluxes Incorrect

During a preventative maintenance visit to perform the 6-month
calibrations, the home15 and home30 outputs began reading the
same as one another.  A fuse replacement and lubrication of the 
AEM sprockets on 11/13 corrected the problem.

During the interval specified, the home15, home30, and sensible
and latent heat fluxes are incorrect.

• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• temp_trh_top
• bowen_ratio
• rh_top_fraction
• home_signal_30
• rh_bottom_fraction
• home_signal_15
• latent_heat_flux
• vapor_pressure_top
• sensible_heat_flux
• vapor_pressure_bottom

• rh_left_mv
• temp_trh_left_rr
• temp_air_left
• temp_trh_right_rr
• rh_right_mv
• temp_air_right

• home_signal
• temp_trh_top
• temp_trh_bottom
• temp_air_top
• temp_air_bottom
• rh_top_fraction
• rh_bottom_fraction
• vapor_pressure_top
• vapor_pressure_bottom

SGP/EBBR/E26 - 6 Month Checks

Many measurements were incorrect while the AEM was positioned with both aspirators at the 
same height for comparison checks.

• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• rh_bottom_fraction
• latent_heat_flux
• sensible_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom

• rh_left_mv
• temp_trh_left_rr
• temp_air_left
• temp_trh_right_rr
• rh_right_mv
• temp_air_right

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• temp_air_bottom
• rh_top_fraction
• rh_bottom_fraction
• vapor_pressure_top
• vapor_pressure_bottom

SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect

In a trip to E26, I found that a bad spark gap through which the barometer was powered was 
causing pressure measurements to be incorrect.  The pressure readings oscillated with 
the voltage of the EBBR battery.  During daytime the voltage and thus the pressure would 
increase and vice versa during dark hours.

Apparently only the positive side of the power supply was properly connected through the 
spark gap and thus the voltage received by the pressure sensor was lower than required to 
power it properly.  Under this condition the perssure measurement varies with voltage 
level.  The pressure measurements therefore had a diurnal signature and usually were 
incorrect.  

The decreased pressure during most times would cause latent heat flux to be slightly 
overestimated and sensible heat flux to be slightly underestimated.

• bowen_ratio
• latent_heat_flux
• Barometric Pressure(atmos_pressure)
• sensible_heat_flux

• atmos_pressure_mv

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E26  - Wind Speed Sensor Frozen By Ice Storm

The wind speed sensor was frozen stopped by ice from a storm.  The wind speed 
and residual wind speed measurements are incorrect.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E26  - Wind Direction Sensor Frozen By Ice Storm

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

• wdir_vec_mean_mv

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

SGP/EBBR/E26  - Wind Speed Frozen Stopped By Ice

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E26  - Wind Direction Frozen Stopped By Ice

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

SGP/EBBR/E26 - Soil Temperature #4 and Soil Heat Flow #4 Incorrect

The soil temperature and soil heat flow probes for set #4 was pulled 
partially out of the ground.  This caused soil temperature #4 to be too high and soil heat 
flow #4 to be too low.  The error is not so great as to cause a large error in the 
sensible and latent heat fluxes.

• latent_heat_flux
• energy_storage_change_4
• corr_soil_heat_flow_4
• soil_temp_4
• surface_soil_heat_flux_4
• soil_heat_capacity_4
• sensible_heat_flux
• soil_heat_flow_4

SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect

In a trip to E26, I found that a bad spark gap through which the barometer was powered was 
causing pressure measurements to be incorrect.  The pressure readings oscillated with 
the voltage of the EBBR battery.  During daytime the voltage and thus the pressure would 
increase and vice versa during dark hours.

Apparently only the positive side of the power supply was properly connected through the 
spark gap and thus the voltage received by the pressure sensor was lower than required to 
power it properly.  Under this condition the perssure measurement varies with voltage 
level.  The pressure measurements therefore had a diurnal signature and usually were 
incorrect.  

The decreased pressure during most times would cause latent heat flux to be slightly 
overestimated and sensible heat flux to be slightly underestimated.

• bowen_ratio
• latent_heat_flux
• Barometric Pressure(atmos_pressure)
• sensible_heat_flux

• atmos_pressure_mv

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E26 - 6 Month Checks

Many measurements were incorrect while the AEM was positioned with both aspirators at the 
same height for comparison checks.

• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• rh_bottom_fraction
• latent_heat_flux
• sensible_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom

• rh_left_mv
• temp_trh_left_rr
• temp_air_left
• temp_trh_right_rr
• rh_right_mv
• temp_air_right

• temp_trh_top
• temp_trh_bottom
• temp_air_top
• temp_air_bottom
• rh_top_fraction
• rh_bottom_fraction
• vapor_pressure_top
• vapor_pressure_bottom

SGP/EBBR/E26 - Low Battery Voltage - Many Measurements Incorrect

During low battery voltage conditions (< 10.5 V especially) many measurements are 
incorrect.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26 - Most Measurements Incorrect

Most of the measurements became either too large or too small.
The cause is not known.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Barometric Pressure(atmos_pressure)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• temp_air_left
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• wspd_arith_mean
• wdir_vec_std
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• net_radiation

SGP/EBBR/E26  - Wind Speed Frozen Stopped By Ice Storm

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E26  - Wind Direction Frozen Stopped By Ice Storm

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

• wdir_vec_mean_mv

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

SGP/EBBR/E26 - Aging Pressure Sensor Output Changes
With Supply Voltage

The E26 EBBR pressure sensor experienced the poor internal voltage regulation problem 
experienced at other sites last year.  Aging of the internal voltage regulator caused the 
pressure output to drop by 1-2 kPa (0.1-0.5 kPa is normal) when the Sun rose and the solar 
panel goosed the battery voltage up.  

The sensible and latent heat fluxes were not significantly affected.

• Barometric Pressure(atmos_pressure)

• atmos_pressure_mv

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E26 - Incorrect soil type coefficients used

The soil type coefficents for soil moisture were incorrect from the day
of the system installation on, making soil moisture values too large.

As a result, soil heat flows were overmeasured, and sensible and latent heat fluxes were 
underestimated.

• surface_soil_heat_flux_avg
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_heat_capacity_5
• soil_moisture_1
• soil_heat_capacity_4
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• sensible_heat_flux
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_5

SGP/EBBR/E26 - Improved EBBR CR10 Program

Effective 20050331.1700, the EBBR.E26 CR10 program was revised to improve 
the quality of the primary measurements as follows:
   
1) An RMS procedure is used to determine max and min limits of acceptable
soil heat flow.  This is applied to the individual soil sets.  Measurements
outside the limits are rejected and the measurements within the limits are
used to calculate the average soil heat flow.
   
2) Max and min limits are used to determine incorrect values of net
radiation, sensible heat flux (h), latent heat flux (e), and automatic
exchange mechanism (AEM) signal.  If AEM signal is outside the limits, h 
and e are set to 999s.  If net radiation is outside the limits, h and e are 
set to 999s. If h or e are outside the limits, h and e are set to 999s.
   
Virtually no incorrect soil measurement will affect the primary 
measurements of h and e.
   
By setting h and e to 999s, it can be easily seen that the primary 
variables are incorrect; no other interpretation is possible.
   
Prior to 20050331, the improved CR10 program was NOT in effect.  DQRs have
been submitted for known instances of incorrect soil measurements which
affected the quality of the primary measurements of h and e.
   
Note: the DQR begin date is the begin date of the sgp30ebbrE26.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE26.a1).
~

• surface_soil_heat_flux_avg
• latent_heat_flux
• sensible_heat_flux

SGP/EBBR/E26 - Average Soil Heat Flux Incorrect

A typo in the version 9 EBBR program caused average soil heat flow to be zero, resulting 
in both sensible and latent heat fluxes being approximately 20 watts per meter squared too 
large during the middle of the day.

• surface_soil_heat_flux_avg
• latent_heat_flux
• sensible_heat_flux

SGP/EBBR/E26 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E26 data collected by ARM back to the installation of the 
instrument in June 1992. Please see the current metadata for correct information.  These 
changes do not affect data values or quality.	

The changes are summarized below:
1) Update of "sensor location" information
2) Addition of installation dates for the systems
3) Correction of soil moisture units (from "by volume" to "gravimetric")

• base time(base_time)

• base time(base_time)

• base time(base_time)

SGP/EBBR/E26 - Data Suspect During Low Supply Voltage

Low battery supply voltage resulted in high home signals and questionable data at times.
Data for battery voltage <10.5 volts should be considered to be incorrect.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• lon(lon)
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• lat(lat)
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• Time offset of tweaks from base_time(time_offset)
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Dummy altitude for Zeb(alt)
• Barometric Pressure(atmos_pressure)
• base time(base_time)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• lon(lon)
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• lat(lat)
• temp_air_left
• Dummy altitude for Zeb(alt)
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• lon(lon)
• wspd_arith_mean
• wdir_vec_std
• time(time)
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• Time offset of tweaks from base_time(time_offset)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• Dummy altitude for Zeb(alt)
• vapor_pressure_top
• net_radiation
• lat(lat)
• base time(base_time)

SGP/EBBR/E26 - Measurements Incorrect

Most measurements were incorrect during low battery voltage conditions.

• wspd_vec_mean
• rh_top_fraction
• wspd_arith_mean
• latent_heat_flux
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• lon(lon)
• sensible_heat_flux
• surface_soil_heat_flux_avg
• net_radiation
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• lat(lat)
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• wdir_vec_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• Time offset of tweaks from base_time(time_offset)
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Dummy altitude for Zeb(alt)
• Barometric Pressure(atmos_pressure)
• base time(base_time)

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• lon(lon)
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• lat(lat)
• temp_air_left
• Dummy altitude for Zeb(alt)
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• soil_temp_2_rr
• wspd_arith_mean
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• lon(lon)
• wspd_arith_mean
• wdir_vec_std
• time(time)
• rh_top_fraction
• home_signal
• Barometric Pressure(atmos_pressure)
• Time offset of tweaks from base_time(time_offset)
• rh_bottom_fraction
• temp_reference
• wdir_vec_mean
• temp_trh_top
• temp_air_top
• wspd_vec_mean
• temp_air_bottom
• vapor_pressure_bottom
• Dummy altitude for Zeb(alt)
• vapor_pressure_top
• net_radiation
• lat(lat)
• base time(base_time)

SGP/EBBR/E26 - Sensible and Latent Heat Fluxes Affected by bad temp sensor

The left Thum (temperature of the humidity sensor chamber) measurement was incorrect at 
times, affecting several measurements, including the sensible and latent heat fluxes.

• vapor_pressure_bottom
• temp_trh_top
• bowen_ratio
• latent_heat_flux
• temp_trh_bottom
• vapor_pressure_top
• sensible_heat_flux

• temp_trh_left_rr

• temp_trh_top
• temp_trh_bottom
• vapor_pressure_bottom
• vapor_pressure_top

SGP/EBBR/E26 - Wind Speed Incorrect

The wind speed sensor was frozen stopped by freezing rain.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean