SGP/EBBR/E9 - 6 Month Checks

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

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

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

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

SGP/EBBR/E9 - Wind Speed Threshhold Low

When the wind speed is very low, the anemometer cups stop turning.  Wind
speeds above the threshhold may be underestimated.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

SGP/EBBR/E9  - 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_vec_mean
• wspd_arith_mean

SGP/EBBR/E9  - 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

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

SGP/EBBR/E9  - 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

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

SGP/EBBR/E9  - 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_vec_mean
• wspd_arith_mean

SGP/EBBR/E9 - Soil moisture too high

The 15 and 30 minute data for sm3 indicated that there was a problem with the sensor that 
kept the soil moisture artificially high.  This corrected itself on 6/11, but it is not 
clear why. 

A new sensor was installed on 6/17 and it has behaved well since then.

• soil_moisture_3_rr

• soil_moisture_3

SGP/EBBR/E9 - Net Radiation Incorrect: Sensible and Latent Heat Fluxes Incorrect

Water had entered the top of the net radiometer during the rain on 10/31 early morning.  
The net radiation, and thus sensible and latent heat fluxes were incorreect during the 
stated period.

• net_radiation_mv

• net_radiation

• latent_heat_flux
• net_radiation
• sensible_heat_flux

SGP/EBBR/E9 - metadata corrections

On 20050420, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E9 data collected by ARM back to the installation of the 
instrument in December 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/E9 - Net Radiation, Sensible and Latent Heat Fluxes Incorrect

The top dome of the net radiometer was broken, resulting in net radiations that were too 
small, and thus sensible and latent heat fluxes that were too small.

• net_radiation_mv

• net_radiation

• latent_heat_flux
• net_radiation
• sensible_heat_flux

SGP/EBBR/E9 - Wind Speed Incorrect

The wind speed measurement was incorrect after the cup anemometer lost a cup.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean