SGP/EBBR/E13 - incorrect meteorological observations

EDITOR'S NOTE:  This DQR refers ti data collected by the EBBR at E13 prior
to the begin date of regular ARM data.  At that time, the data streams which
contain the EBBR.E13 data were named
      Dsgp15ebbr1.a0
      Dsgp30ebbr1.a1
      Dsgp5ebbr1.a0
These data are not readily available from the ARM archive, but can be 
made available by special request.  The actual time range of the problem
described here is 930417.1200-930422.1730.


Beginning at 1200 UTC on 17 April 1993, EBBR1, Central Facility, outputs
ramped to extreme values, some positive, some negative.  These outputs ended
their ramping approximately 3 hours later.  Comparison with SMOS data
indicate that no time averaged outputs from EBBR1 were consistent with the
SMOS after 1200 UTC.

It appears that the averaging instruction in the CR10 data logger had been
corrupted.  On 22 April site operations, at my request, tried to reenter
the software; this attempt was completely unsuccessful, indicating that the
CR10 probably had other problems as well.  EBBR1 was offline from 1730 UTC
on 22 April until 1400 UTC on 23 April, when a new CR10 was installed and the
software downloaded successfully.

Since a SDS utility for extracting real time data from the CF SMOS had not been
established, EBBR1 was being used for weather observations.  All EBBR1
measurements of meteorological quantities during the period above are
invalid.

• Wind speed arithmetic mean(wspd_arith_mean)
• Bottom air temperature(temp_air_bottom)
• Top relative humidity (fractional)(rh_top_fraction)
• Net radiation(net_radiation)
• Top T/RH sensor temperature(temp_trh_top)
• Reference temperature in enclosure(temp_reference)
• Top vapor pressure(vapor_pressure_top)
• Bottom vapor pressure(vapor_pressure_bottom)
• Time offset from base_time(time_offset)
• Atmospheric pressure(atmos_pressure)
• Top air temperature(temp_air_top)
• lon(lon)
• Bottom T/RH sensor temperature(temp_trh_bottom)
• Wind direction vector mean(wdir_vec_mean)
• Wind direction vector mean standard deviation(wdir_vec_std)
• -180.0 - +180.0(alt)
• AEM position indicator(home_signal)
• Wind speed vector mean(wspd_vec_mean)
• North Latitude(lat)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• base time in epoch(base_time)

• Bowen ratio(bowen_ratio)
• -180.0 - +180.0(alt)
• Top T/RH sensor temperature(temp_trh_top)
• AEM position indicator 0 to 15 mins(home_signal_15)
• Surface sensible heat flux(sensible_heat_flux)
• Change in energy storage 3, 0-5 cm soil layer(energy_storage_change_3)
• Top relative humidity (fractional)(rh_top_fraction)
• Change in energy storage 2, 0-5 cm soil layer(energy_storage_change_2)
• Change in energy storage 1, 0-5 cm soil layer(energy_storage_change_1)
• Bottom air temperature(temp_air_bottom)
• Surface soil heat flux 5(surface_soil_heat_flux_5)
• Wind speed arithmetic mean(wspd_arith_mean)
• Reference temperature in enclosure(temp_reference)
• Soil moisture 3, gravimetric(soil_moisture_3)
• Soil moisture 4, gravimetric(soil_moisture_4)
• Soil heat flow 1, corrected for soil moisture(corr_soil_heat_flow_1)
• Top air temperature(temp_air_top)
• Soil moisture 5, gravimetric(soil_moisture_5)
• Soil heat flow 2, corrected for soil moisture(corr_soil_heat_flow_2)
• Soil heat flow 3, corrected for soil moisture(corr_soil_heat_flow_3)
• Soil heat flow 4, corrected for soil moisture(corr_soil_heat_flow_4)
• Soil heat flow 5, corrected for soil moisture(corr_soil_heat_flow_5)
• Soil moisture 1, gravimetric(soil_moisture_1)
• Soil moisture 2, gravimetric(soil_moisture_2)
• lon(lon)
• Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)
• Wind direction vector mean(wdir_vec_mean)
• Change in energy storage 5, 0-5 cm soil layer(energy_storage_change_5)
• Change in energy storage 4, 0-5 cm soil layer(energy_storage_change_4)
• Net radiation(net_radiation)
• AEM position indicator 15 to 30 mins(home_signal_30)
• Wind direction vector mean standard deviation(wdir_vec_std)
• base time in epoch(base_time)
• Atmospheric pressure(atmos_pressure)
• Wind speed vector mean(wspd_vec_mean)
• Time offset from base_time(time_offset)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• Soil heat flow 2(soil_heat_flow_2)
• Soil heat flow 3(soil_heat_flow_3)
• Soil heat flow 4(soil_heat_flow_4)
• Soil heat flow 5(soil_heat_flow_5)
• Surface soil heat flux 3(surface_soil_heat_flux_3)
• Surface soil heat flux 4(surface_soil_heat_flux_4)
• Surface soil heat flux 1(surface_soil_heat_flux_1)
• Surface soil heat flux 2(surface_soil_heat_flux_2)
• Soil heat flow 1(soil_heat_flow_1)
• Half hour averaged soil temperature 5(soil_temp_5)
• Half hour averaged soil temperature 4(soil_temp_4)
• North Latitude(lat)
• Soil temperature mean 3(soil_temp_3)
• Soil heat capacity 4(soil_heat_capacity_4)
• Soil temperature 2(soil_temp_2)
• Soil heat capacity 5(soil_heat_capacity_5)
• Surface latent heat flux(latent_heat_flux)
• Soil temperature 1(soil_temp_1)
• Soil heat capacity 2(soil_heat_capacity_2)
• Soil heat capacity 3(soil_heat_capacity_3)
• Bottom vapor pressure(vapor_pressure_bottom)
• Bottom T/RH sensor temperature(temp_trh_bottom)
• Top vapor pressure(vapor_pressure_top)
• Soil heat capacity 1(soil_heat_capacity_1)