SGP/EBBR/E12 - 6 Month Checks

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

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

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

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

SGP/EBBR/E12 - AEM home_15 Incorrect, Flux Measurements not affected

The home_15 measurement was incorrect during much of the stated period.
The AEM was exchanging however, and thus the flux measurements were not affected.

• home_signal

• home_signal

• home_signal_15

SGP/EBBR/E12  - 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_arith_mean
• wspd_vec_mean

• wspd_vec_mean
• wspd_arith_mean

SGP/EBBR/E12  - 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_mv

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std

SGP/EBBR/E12  - 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_arith_mean
• wspd_vec_mean

• wspd_vec_mean
• wspd_arith_mean

SGP/EBBR/E12  - 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_mv

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std

SGP/EBBR/E12 - Wind Speed and Direction Frozen by Ice Storm

The wind speed and direction sensors were frozen by ice from and ice storm.

• wspd_arith_mean
• wdir_vec_mean_mv

• wdir_vec_mean
• wdir_vec_std
• wspd_arith_mean
• wspd_vec_mean

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std
• wspd_arith_mean

SGP/EBBR/E12 - Improved EBBR CR10 Program

Effective 20050329.1830, the EBBR.E12 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 20050329, 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 sgp30ebbrE12.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE12.a1).

• surface_soil_heat_flux_avg
• sensible_heat_flux
• latent_heat_flux

SGP/EBBR/E12 - 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
• sensible_heat_flux
• latent_heat_flux

SGP/EBBR/E12 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E12 data collected by ARM back to the installation of the 
instrument in August 1993. 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 type
4) Correction of soil moisture units (from "by volume" to "gravimetric")

• base time(base_time)

• base time(base_time)

• base time(base_time)

SGP/EBBR/E12 - Sensible and Latent Heat Fluxes Incorrect at Times

Large spikes in soil temperature #2 are causing the soil heat storage
term to blow up, and thus the average soil heat flow, sensible heat flux, 
and latent heat flux to be incorrect at times.

• soil_temp_2_rr

• energy_storage_change_2
• surface_soil_heat_flux_avg
• surface_soil_heat_flux_2
• sensible_heat_flux
• latent_heat_flux

SGP/EBBR/E12 - Multiplexer failure

Sensible and latent heat fluxes are incorrect during a period when multiplexer #2 
experienced a failure.

• temp_air_left
• temp_air_right

• rh_bottom_fraction
• net_radiation
• temp_air_top
• vapor_pressure_top
• Barometric Pressure(atmos_pressure)
• vapor_pressure_bottom
• temp_air_bottom
• rh_top_fraction

• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• Barometric Pressure(atmos_pressure)
• soil_heat_flow_2
• soil_moisture_4
• soil_moisture_1
• temp_air_top
• temp_air_bottom
• soil_heat_flow_3
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_2
• surface_soil_heat_flux_5
• soil_heat_flow_1
• soil_moisture_3
• surface_soil_heat_flux_avg
• soil_heat_flow_5
• soil_heat_flow_4
• vapor_pressure_bottom
• sensible_heat_flux
• latent_heat_flux
• soil_moisture_2
• vapor_pressure_top
• net_radiation

SGP/EBBR/E12 - Fluxes and Gradient Measurements Incorrect

The AEM hung in one position; therefore the fluxes and gradient measurements were 
incorrect.

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

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

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

SGP/EBBR/E12 - Net Radiation, and Sensible and Latent Heat Fluxes Incorrect

Rain entered into the net radiometer through a broken top dome.  Most of the net radiation 
values during the period are much too large, thus sensible and latent fluxes are also 
too large.

• net_radiation_mv

• net_radiation

• net_radiation
• sensible_heat_flux
• latent_heat_flux

SGP/EBBR/E12 - Soil Temperature #1 Incorrect

During much of this period soil temperature #1 was offscale or erratic.
Sensible and latent heat fluxes were not ususally affected.

• soil_temp_1_rr

• surface_soil_heat_flux_1
• soil_temp_1
• energy_storage_change_1
• soil_heat_capacity_1