SGP/EBBR/E27  -  E27 EBBR Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) 
in 30EBBR

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(cs1)
• Soil heat capacity 3(cs3)
• Soil heat capacity 5(cs5)
• Soil heat capacity 2(cs2)
• Soil heat capacity 4(cs4)

• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_capacity_3

SGP/EBBR/E27 - Soil Heat Flow #2 Incorrect

Soil Heat Flow sensor #2 was intermittently incorrect at first and then
constantly so later in the period.

• 5 cm soil heat flow, site 2(shf2)
• soil heat flow, site 2(g2)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)

• Soil heat flow 2(mv_hft2)

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

• soil_heat_flow_2_mv

SGP/EBBR/E27 - Soil Heat Flow #4 Incorrect

Soil Heat flow sensor #4 outputs were often very small negative numbers.

See below for a work-around.

• average surface soil heat flow(ave_shf)
• latent heat flux(e)
• h(h)
• soil heat flow, site 4(g4)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)

• Soil heat flow 4(mv_hft4)

• latent_heat_flux
• sensible_heat_flux
• soil_heat_flow_4
• surface_soil_heat_flux_4
• surface_soil_heat_flux_avg
• corr_soil_heat_flow_4

• soil_heat_flow_4_mv

SGP/EBBR/E27 - Reference T Sensor Failure

The reference T sensor was not working much of the time, affecting 
all other temperature sensors.  Sensible and latent heat fluxes
were incorrect when this occurred.

• Reference Thermistor Temperature(tref)
• bottom air temperature(tair_bot)
• latent heat flux(e)
• h(h)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top air temperature(tair_top)

• Right air temperature(tair_r)
• Left air temperature(tair_l)
• Reference temperature(rr_tref)

• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• bottom air temperature(tair_bot)

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

• temp_reference_rr
• temp_air_left
• temp_air_right

SGP/EBBR/E27 - Wind Direction Hung

The Wind Direction frequently hung at values in the 70s or 80s.

No other data was affected. Fluxes were not affected.

• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)

• Wind direction (relative to true north)(mv_wind_d)

• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)

• wdir_vec_std
• wdir_vec_mean
• wspd_vec_mean

• wdir_vec_mean_mv

SGP/EBBR/E27 -  6 Month Checks

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

• Temperature of bottom humidity sensor chamber(thum_bot)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• bottom air temperature(tair_bot)
• Top humidity(hum_top)
• h(h)
• latent heat flux(e)
• top vapor pressure(vp_top)
• Temperature of the top humidity chamber(thum_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top air temperature(tair_top)

• Right relative humidity(mv_hum_r)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left air temperature(tair_l)
• Left relative humidity(mv_hum_l)
• Right air temperature(tair_r)
• Temperature of left humidity sensor chamber(rr_thum_l)

• Temperature of bottom humidity sensor chamber(thum_bot)
• Bottom humidity(hum_bot)
• top vapor pressure(vp_top)
• top air temperature(tair_top)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• bottom air temperature(tair_bot)
• Top humidity(hum_top)

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

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

SGP/EBBR/E27  - Soil Heat Flow #1 Large

Soil Heat Flow #1 was large for this period, for
an unknown reason.

• 5 cm soil heat flow, site 1(shf1)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• latent heat flux(e)
• h(h)
• soil heat flow, site 1(g1)

• Soil heat flow 1(mv_hft1)

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

• soil_heat_flow_1_mv

SGP/EBBR/E27  - Incorrect Data From Logger Restart

Some 30 minute was zero or incorrect after restart of the CR10.

This is a common occurrence when sensor replacements are made or power
outages occur.

• 0-5 cm change in soil heat storage with time, site 5(ces5)
• soil heat flow, site 3(g3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• h(h)
• latent heat flux(e)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• soil heat flow, site 1(g1)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• soil heat flow, site 2(g2)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• average surface soil heat flow(ave_shf)
• soil heat flow, site 4(g4)
• soil heat flow, site 5(g5)

• latent_heat_flux
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_5
• surface_soil_heat_flux_1
• surface_soil_heat_flux_2
• sensible_heat_flux
• surface_soil_heat_flux_4
• surface_soil_heat_flux_avg
• surface_soil_heat_flux_5
• home_signal_15
• energy_storage_change_4
• energy_storage_change_1
• surface_soil_heat_flux_3

SGP/EBBR/E27 - Improved EBBR CR10 Program

Effective 20050330.1730, the EBBR.E27 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 20050330, 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 sgp30ebbrE27.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE27.a1).

• latent_heat_flux
• sensible_heat_flux
• surface_soil_heat_flux_avg

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.

• temp_trh_left_rr

• vapor_pressure_top
• temp_trh_top
• temp_trh_bottom
• vapor_pressure_bottom

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