SGP/EBBR/E4 - EBBR E4 Low Battery Voltage

On 29 April 1998 the battery voltage dropped to below 10.5 volts.  No data,
except for battery voltage, can be assumed to be correct during this period.
The battery was replaced at 1830 GMT.  The cause of the problem appears to
be a failed solar panel charger/regulator. The voltage of the new battery
has dropped steadily since installation; it is apparently not being charged.
A work request has been submitted to have the charger/regulator replaced.

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

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

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