EBBR E8 Net Radiation Data Quality

On 14 July 1997 lightning struck the EBBR at E8.  A number of sensors and
components needed to be replaced.  One component that was not replaced, a
J-panel, suffered some damage that was not obvious at the time.
Also, changes in sensors eventually required a change in the CR10 program 
to accomodate new calibration factors.  A new program was installed on 14
October.  Unfortunately, an incorrect nighttime calibration for the net
radiation was contained in the new program provided by the EBBR vendor REBS.
The calibration problem will be covered in a separate DQR.

The J-panel problem began to surface on 14 October as well, with most
net radiation values being smaller than correct values during the day, and 
large negative at night; the latter was partially from the J-panel problem
and partially from the incorrect nighttime calibration.  All net radiation
values, nighttime and daytime from 14 October 1997 through 12 May 1998 need
to be examined carefully (and compared with other nearby sites) to determine
if they are correct, and nighttime values need to be corrected.  Much of
the latent and sensible heat flux data is corrupted by both problems.  

The correction to nightime values will be covered in two subsequent DQRs, as
two net radiometers, with different calibrations, have been used at E8 since
14 October 1997.

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

• Wind direction vector mean (mV)(wdir_vec_mean_mv)
• lon(lon)
• Net radiation (mV)(net_radiation_mv)
• Left air temperature(temp_air_left)
• Left T/RH sensor temperature (resistance ratio)(temp_trh_left_rr)
• Wind speed arithmetic mean(wspd_arith_mean)
• Right relative humidity (mV)(rh_right_mv)
• Soil temperature 1 (resistance ratio)(soil_temp_1_rr)
• Soil heat flow 2 (mV)(soil_heat_flow_2_mv)
• Soil moisture 2 (resistance)(soil_moisture_2_r)
• Right T/RH sensor temperature (resistance ratio)(temp_trh_right_rr)
• Time offset from base_time(time_offset)
• Soil heat flow 1 (mV)(soil_heat_flow_1_mv)
• Left relative humidity (mV)(rh_left_mv)
• AEM position indicator(home_signal)
• Soil moisture 1 (resistance)(soil_moisture_1_r)
• Soil heat flow 4 (mV)(soil_heat_flow_4_mv)
• Soil moisture 5 (resistance)(soil_moisture_5_r)
• base time in epoch(base_time)
• Soil temperature 4 (resistance ratio)(soil_temp_4_rr)
• Soil heat flow 3 (mV)(soil_heat_flow_3_mv)
• Atmospheric pressure (mV)(atmos_pressure_mv)
• Soil temperature 5 (resistance ratio)(soil_temp_5_rr)
• Battery voltage(battery_voltage)
• Soil moisture 4 (resistance)(soil_moisture_4_r)
• Soil temperature 2 (resistance ratio)(soil_temp_2_rr)
• Reference temperature in enclosure (resistance ratio)(temp_reference_rr)
• Right air temperature(temp_air_right)
• Soil heat flow 5 (mV)(soil_heat_flow_5_mv)
• Soil temperature 3 (resistance ratio)(soil_temp_3_rr)
• -180.0 - +180.0(alt)
• Soil moisture 3 (resistance)(soil_moisture_3_r)
• North Latitude(lat)

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