SGP/EBBR/E19 - Incorrect Sensible and Latent Heat Fluxes

The gradient measurements and latent and sensible heat fluxes were incorrect because the 
AEM was not exchanging. 

The problem was fixed by replacing the AEM.

• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)

• Right air temperature(tair_r)
• Left air temperature(tair_l)

• top vapor pressure(vp_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• Temperature of the top humidity chamber(thum_top)
• top air temperature(tair_top)
• soil heat flow, site 1(g1)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Top humidity(hum_top)
• bottom vapor pressure(vp_bot)
• latent heat flux(e)
• Bottom humidity(hum_bot)
• bottom air temperature(tair_bot)

SGP/EBBR/E15 - Incorrect Sensible and Latent Heat Fluxes

Incorrect gradient measurements and sensible and latent heat fluxes resulted from the AEM 
not exchanging.

• Right air temperature(tair_r)
• Left air temperature(tair_l)

• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom vapor pressure(vp_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• bottom air temperature(tair_bot)
• top vapor pressure(vp_top)
• latent heat flux(e)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)
• top air temperature(tair_top)
• Bottom humidity(hum_bot)
• h(h)

• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• bottom air temperature(tair_bot)
• Bottom humidity(hum_bot)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)

SGP/EBBR/E7 - Barometric Pressure Incorrect

The pressure measurement sometimes dropped to zero during daytime because of 
unstable battery voltage.

• Atmospheric pressure(mv_pres)

• Retrieved pressure profile(pres)

• Retrieved pressure profile(pres)

SGP/EBBR/E8 - AEM Not Exchanging

The AEM hung in one position frequently and sometimes for many days during this period

While the AEM was not switching, the sensible and latent heat fluxes and gradient 
measurements were incorrect.

• latent heat flux(e)
• bottom air temperature(tair_bot)
• h(h)
• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top vapor pressure(vp_top)
• top air temperature(tair_top)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)

• Temperature of the top humidity chamber(thum_top)
• bottom air temperature(tair_bot)
• bottom vapor pressure(vp_bot)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Bottom humidity(hum_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)

• Left air temperature(tair_l)
• Right air temperature(tair_r)

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 temperature 2(rr_ts2)

• 0-5 cm change in soil heat storage with time, site 2(ces2)
• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• soil heat flow, site 2(g2)
• h(h)

SGP/EBBR/E22 - Sensible and Latent Heat Fluxes Incorrect

• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• Bottom humidity(hum_bot)
• bottom air temperature(tair_bot)
• top vapor pressure(vp_top)

• Temperature of the top humidity chamber(thum_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Bottom humidity(hum_bot)
• top air temperature(tair_top)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom air temperature(tair_bot)
• latent heat flux(e)
• Top humidity(hum_top)
• h(h)
• bottom vapor pressure(vp_bot)

• Left air temperature(tair_l)
• Right air temperature(tair_r)

SGP/EBBR/E27 - Sensible and Latent Heat Fluxes Incorrect

The left T/RH probe temperature sensor was spiking some of the time during these periods. 
Therefore, sensible and latent heat fluxes were incorrect during parts of the periods as 
well.

• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)

• bottom vapor pressure(vp_bot)
• h(h)
• latent heat flux(e)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)

• Temperature of left humidity sensor chamber(rr_thum_l)

SGP/EBBR/E22 - Fluxes Incorrect When Soil Heat Flow #3 Out of Range

When soil heat flow #3 exceeded the range limit in the EBBR program, it was replaced with 
9999es.  This caused the ave_shf and the sensible and latent heat fluxes to be incorrect.

• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 1(shf1)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)

SGP/EBBR/E12 - Fluxes and Gradient Measurements Incorrect

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

• Right air temperature(tair_r)
• Left relative humidity(mv_hum_l)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left air temperature(tair_l)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Right relative humidity(mv_hum_r)

• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• bottom air temperature(tair_bot)
• Bottom humidity(hum_bot)
• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)

• bottom air temperature(tair_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Top humidity(hum_top)
• top air temperature(tair_top)
• Temperature of the top humidity chamber(thum_top)
• h(h)
• latent heat flux(e)
• top vapor pressure(vp_top)
• Bottom humidity(hum_bot)

SGP/EBBR/E13 - Missing Data

The Data was missing during these three periods for various reasons.

• Soil moisture 2(r_sm2)
• lon(lon)
• base time(base_time)
• Soil heat flow 2(mv_hft2)
• Soil moisture 3(r_sm3)
• Soil heat flow 3(mv_hft3)
• Soil moisture 4(r_sm4)
• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 1(r_sm1)
• Home signal(mv_home)
• Temperature of right humidity sensor chamber(rr_thum_r)
• lat(lat)
• Left relative humidity(mv_hum_l)
• Time offset of tweaks from base_time(time_offset)
• Soil moisture 5(r_sm5)
• Reference temperature(rr_tref)
• Net radiation(mv_q)
• Signature(signature)
• Temperature of left humidity sensor chamber(rr_thum_l)
• scalar wind speed(wind_s)
• Soil heat flow 1(mv_hft1)
• Soil heat flow 4(mv_hft4)
• Soil temperature 3(rr_ts3)
• Soil temperature 4(rr_ts4)
• Soil temperature 5(rr_ts5)
• Right relative humidity(mv_hum_r)
• Soil heat flow 5(mv_hft5)
• Soil temperature 2(rr_ts2)
• Left air temperature(tair_l)
• Atmospheric pressure(mv_pres)
• Dummy altitude for Zeb(alt)
• Soil temperature 1(rr_ts1)
• Right air temperature(tair_r)
• Battery(bat)

• base time(base_time)
• Home signal(home)
• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• Dummy altitude for Zeb(alt)
• lon(lon)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• time(time)
• Temperature of bottom humidity sensor chamber(thum_bot)
• lat(lat)
• net radiation(q)
• Temperature of the top humidity chamber(thum_top)
• vector wind speed(res_ws)
• Time offset of tweaks from base_time(time_offset)
• top vapor pressure(vp_top)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• Retrieved pressure profile(pres)
• scalar wind speed(wind_s)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)

• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• Soil heat capacity 4(cs4)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow, site 4(shf4)
• top vapor pressure(vp_top)
• volumetric soil moisture, site 4(sm4)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• volumetric soil moisture, site 5(sm5)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• soil heat flow, site 3(g3)
• Reference Thermistor Temperature(tref)
• bottom air temperature(tair_bot)
• base time(base_time)
• 0-5 cm integrated soil temperature, site 2(ts1)
• soil heat flow, site 2(g2)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• h(h)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• volumetric soil moisture, site 2(sm2)
• 5 cm soil heat flow, site 1(shf1)
• scalar wind speed(wind_s)
• top air temperature(tair_top)
• Top humidity(hum_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Soil heat capacity 3(cs3)
• 5 cm soil heat flow, site 2(shf2)
• Time offset of tweaks from base_time(time_offset)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• wind direction (relative to true north)(wind_d)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• vector wind speed(res_ws)
• Bottom humidity(hum_bot)
• Retrieved pressure profile(pres)
• soil heat flow, site 1(g1)
• soil heat flow, site 4(g4)
• 0-5 cm integrated soil temperature, site 5(ts5)
• Soil heat capacity 2(cs2)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• latent heat flux(e)
• Soil heat capacity 1(cs1)
• lat(lat)
• net radiation(q)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow, site 3(shf3)
• volumetric soil moisture, site 1(sm1)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 5 cm soil heat flow, site 5(shf5)
• lon(lon)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm integrated soil temperature, site 3(ts3)
• soil heat flow, site 5(g5)
• 0-5 cm integrated soil temperature, site 4(ts4)
• Soil heat capacity 5(cs5)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Dummy altitude for Zeb(alt)

SGP/EBBR/E13 - Flux and Gradient Measurements Incorrect

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

• Temperature of left humidity sensor chamber(rr_thum_l)
• Left air temperature(tair_l)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Right air temperature(tair_r)
• Left relative humidity(mv_hum_l)
• Right relative humidity(mv_hum_r)

• top air temperature(tair_top)
• Temperature of the top humidity chamber(thum_top)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)

• Bottom humidity(hum_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Temperature of bottom humidity sensor chamber(thum_bot)
• h(h)
• Top humidity(hum_top)
• top air temperature(tair_top)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• latent heat flux(e)
• bottom air temperature(tair_bot)

SGP/EBBR/E13 - Net Radiation and Fluxes Suspect

The net radiometer had water in it, making the net radiation and flux measurements 
suspect; the latter do not appear to be incorrect, but should be considered as suspect anyway.

• Net radiation(mv_q)

• net radiation(q)

• net radiation(q)
• latent heat flux(e)
• h(h)

SGP/EBBR/E15 - Wind Speed Sensor Frozen Stopped

Freezing rain froze the wind speed sensor to a stopped condition during the period.

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

SGP/EBBR/E18 - Wind Speed Zero

Wind Speed was zero, presumably because the sensor was frozen stopped during freezing 
rain.

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)

SGP/EBBR/E2 - Wind Speed Sensor Frozen Stopped

Freezing rain froze the wind speed sensor to a stopped condition.

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

SGP/EBBR/E20 - Suspect Measurements

Some measurements may be incorrect because of low supply voltage.

• 5 cm soil heat flow, site 2(shf2)
• base time(base_time)
• 5 cm soil heat flow, site 3(shf3)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• Time offset of tweaks from base_time(time_offset)
• Reference Thermistor Temperature(tref)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Soil heat capacity 3(cs3)
• 5 cm soil heat flow, site 5(shf5)
• average surface soil heat flow(ave_shf)
• Bottom humidity(hum_bot)
• Soil heat capacity 1(cs1)
• volumetric soil moisture, site 2(sm2)
• Soil heat capacity 4(cs4)
• top vapor pressure(vp_top)
• 0-5 cm integrated soil temperature, site 3(ts3)
• scalar wind speed(wind_s)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• top air temperature(tair_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 0-5 cm integrated soil temperature, site 5(ts5)
• net radiation(q)
• bottom air temperature(tair_bot)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• Soil heat capacity 2(cs2)
• lon(lon)
• volumetric soil moisture, site 1(sm1)
• Dummy altitude for Zeb(alt)
• soil heat flow, site 1(g1)
• Top humidity(hum_top)
• 0-5 cm integrated soil temperature, site 2(ts1)
• volumetric soil moisture, site 5(sm5)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• lat(lat)
• 0-5 cm integrated soil temperature, site 2(ts2)
• volumetric soil moisture, site 4(sm4)
• Temperature of the top humidity chamber(thum_top)
• soil heat flow, site 5(g5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• latent heat flux(e)
• h(h)
• wind direction (relative to true north)(wind_d)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• soil heat flow, site 4(g4)
• Retrieved pressure profile(pres)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• soil heat flow, site 2(g2)
• vector wind speed(res_ws)
• 5 cm soil heat flow, site 4(shf4)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow, site 1(shf1)
• soil heat flow, site 3(g3)
• Soil heat capacity 5(cs5)
• bottom vapor pressure(vp_bot)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)

• Soil heat flow 4(mv_hft4)
• Soil temperature 2(rr_ts2)
• Soil heat flow 5(mv_hft5)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil moisture 3(r_sm3)
• Reference temperature(rr_tref)
• Soil temperature 3(rr_ts3)
• Soil temperature 5(rr_ts5)
• lat(lat)
• Soil temperature 4(rr_ts4)
• Temperature of left humidity sensor chamber(rr_thum_l)
• lon(lon)
• Left air temperature(tair_l)
• base time(base_time)
• Soil temperature 1(rr_ts1)
• Time offset of tweaks from base_time(time_offset)
• Battery(bat)
• Net radiation(mv_q)
• Home signal(mv_home)
• Dummy altitude for Zeb(alt)
• Atmospheric pressure(mv_pres)
• Soil moisture 4(r_sm4)
• Soil moisture 5(r_sm5)
• Soil heat flow 1(mv_hft1)
• Soil heat flow 2(mv_hft2)
• Signature(signature)
• Left relative humidity(mv_hum_l)
• Soil heat flow 3(mv_hft3)
• scalar wind speed(wind_s)
• Right air temperature(tair_r)
• Right relative humidity(mv_hum_r)
• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 2(r_sm2)
• Soil moisture 1(r_sm1)

• vector wind speed(res_ws)
• Reference Thermistor Temperature(tref)
• Home signal(home)
• wind direction (relative to true north)(wind_d)
• bottom vapor pressure(vp_bot)
• Retrieved pressure profile(pres)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)
• net radiation(q)
• time(time)
• Top humidity(hum_top)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• Bottom humidity(hum_bot)
• top air temperature(tair_top)
• lat(lat)
• lon(lon)
• scalar wind speed(wind_s)
• Temperature of the top humidity chamber(thum_top)
• bottom air temperature(tair_bot)
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• Dummy altitude for Zeb(alt)

SGP/EBBR/E22 - Wind Speed Sensor Frozen Stopped

The wind speed sensor was frozen to a stopped condition.

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)

SGP/EBBR/E26 - Measurements Incorrect

Most measurements were incorrect during low battery voltage conditions.

• Soil temperature 2(rr_ts2)
• Soil moisture 4(r_sm4)
• Soil temperature 3(rr_ts3)
• Soil heat flow 2(mv_hft2)
• base time(base_time)
• Battery(bat)
• scalar wind speed(wind_s)
• Soil moisture 5(r_sm5)
• Soil heat flow 3(mv_hft3)
• Net radiation(mv_q)
• Left air temperature(tair_l)
• Right air temperature(tair_r)
• Dummy altitude for Zeb(alt)
• Soil moisture 3(r_sm3)
• lat(lat)
• Home signal(mv_home)
• Time offset of tweaks from base_time(time_offset)
• Right relative humidity(mv_hum_r)
• Atmospheric pressure(mv_pres)
• lon(lon)
• Reference temperature(rr_tref)
• Soil temperature 5(rr_ts5)
• Soil temperature 4(rr_ts4)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil heat flow 1(mv_hft1)
• Soil temperature 1(rr_ts1)
• Soil moisture 1(r_sm1)
• Soil heat flow 5(mv_hft5)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil moisture 2(r_sm2)
• Left relative humidity(mv_hum_l)
• Wind direction (relative to true north)(mv_wind_d)
• Soil heat flow 4(mv_hft4)
• Signature(signature)

• Dummy altitude for Zeb(alt)
• base time(base_time)
• wind direction (relative to true north)(wind_d)
• time(time)
• Home signal(home)
• Top humidity(hum_top)
• lon(lon)
• net radiation(q)
• bottom air temperature(tair_bot)
• Bottom humidity(hum_bot)
• Temperature of the top humidity chamber(thum_top)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• bottom vapor pressure(vp_bot)
• top air temperature(tair_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Reference Thermistor Temperature(tref)
• vector wind speed(res_ws)
• Time offset of tweaks from base_time(time_offset)
• scalar wind speed(wind_s)
• lat(lat)
• Retrieved pressure profile(pres)
• top vapor pressure(vp_top)

• volumetric soil moisture, site 2(sm2)
• 0-5 cm integrated soil temperature, site 5(ts5)
• Dummy altitude for Zeb(alt)
• Bottom humidity(hum_bot)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 5 cm soil heat flow, site 5(shf5)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• base time(base_time)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Retrieved pressure profile(pres)
• volumetric soil moisture, site 3(sm3)
• lat(lat)
• volumetric soil moisture, site 4(sm4)
• net radiation(q)
• volumetric soil moisture, site 1(sm1)
• Reference Thermistor Temperature(tref)
• 0-5 cm integrated soil temperature, site 2(ts1)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Temperature of the top humidity chamber(thum_top)
• lon(lon)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• soil heat flow, site 1(g1)
• Soil heat capacity 1(cs1)
• Soil heat capacity 4(cs4)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• Temperature of bottom humidity sensor chamber(thum_bot)
• volumetric soil moisture, site 5(sm5)
• Time offset of tweaks from base_time(time_offset)
• h(h)
• 5 cm soil heat flow, site 1(shf1)
• vector wind speed(res_ws)
• Soil heat capacity 5(cs5)
• 5 cm soil heat flow, site 2(shf2)
• bottom vapor pressure(vp_bot)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• scalar wind speed(wind_s)
• Soil heat capacity 2(cs2)
• Soil heat capacity 3(cs3)
• Top humidity(hum_top)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow, site 3(shf3)
• top air temperature(tair_top)
• latent heat flux(e)
• soil heat flow, site 2(g2)
• top vapor pressure(vp_top)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• soil heat flow, site 5(g5)
• 0-5 cm integrated soil temperature, site 3(ts3)
• wind direction (relative to true north)(wind_d)
• bottom air temperature(tair_bot)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• soil heat flow, site 4(g4)

SGP/EBBR/E27 - Flux and Gradient Measurements Incorrect

The sensible and latent heat flux and gradient measurements were incorrect
while the AEM was hung in one position.

• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• bottom vapor pressure(vp_bot)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• Temperature of the top humidity chamber(thum_top)

• Temperature of the top humidity chamber(thum_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top air temperature(tair_top)
• latent heat flux(e)
• top vapor pressure(vp_top)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• bottom air temperature(tair_bot)
• h(h)
• Top humidity(hum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)

• Right air temperature(tair_r)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left air temperature(tair_l)
• Left relative humidity(mv_hum_l)
• Right relative humidity(mv_hum_r)
• Temperature of left humidity sensor chamber(rr_thum_l)

SGP/EBBR/E4 - Wind Speed Sensor Frozen Stopped

Freezing rain froze the Wind Speed sensor to a stopped condition.

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)

SGP/EBBR/E7 - Fluxes and Gradient Measurements Incorrect

The left AEM aspirator was not working during this period, resulting in incorrect gradient 
and flux measurements.

• Left relative humidity(mv_hum_l)
• Left air temperature(tair_l)
• Temperature of left humidity sensor chamber(rr_thum_l)

• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)
• top air temperature(tair_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• h(h)
• top vapor pressure(vp_top)
• latent heat flux(e)
• Temperature of the top humidity chamber(thum_top)
• bottom air temperature(tair_bot)
• Bottom humidity(hum_bot)

• Top humidity(hum_top)
• Bottom humidity(hum_bot)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• top air temperature(tair_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom vapor pressure(vp_bot)
• bottom air temperature(tair_bot)

SGP/EBBR/E8 - Flux and Gradient Measurements Suspect

The flux and gradient measurements were often incorrect when the AEM did not function 
properly.  The user needs to inspect the data (particularly the home signals) to determine 
when the AEM was and was not working.

• bottom air temperature(tair_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)
• Top humidity(hum_top)
• bottom vapor pressure(vp_bot)
• latent heat flux(e)
• h(h)
• Bottom humidity(hum_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top air temperature(tair_top)
• Temperature of the top humidity chamber(thum_top)

• Temperature of the top humidity chamber(thum_top)
• bottom air temperature(tair_bot)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)

• Temperature of left humidity sensor chamber(rr_thum_l)
• Right air temperature(tair_r)
• Right relative humidity(mv_hum_r)
• Left air temperature(tair_l)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left relative humidity(mv_hum_l)

SGP/EBBR/E8 - Wind Speed Sensor Frozen Stopped

Freezing rain froze the wind speed sensor to a stopped condition.

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)

SGP/EBBR/E8 - Fluxes Incorrect; Left Humidity Near Zero

The left humidity was intermittently incorrect, therefore the sensible and latent heat 
fluxes were also.

• top vapor pressure(vp_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• latent heat flux(e)
• Top humidity(hum_top)
• h(h)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)

• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)
• top vapor pressure(vp_top)

• Left relative humidity(mv_hum_l)

SGP/EBBR/E8 - Sensible and Latent Heat Flux Suspect

The left humidity sensor produced large spikes frequently.  This resulted in incorrect 
measurements of vapor pressure gradient and thus calculations of sensible and latent heat 
flux.

• top vapor pressure(vp_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• latent heat flux(e)
• Top humidity(hum_top)
• h(h)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)

• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)
• top vapor pressure(vp_top)

• Left relative humidity(mv_hum_l)

SGP/EBBR/E27 - Instrument problem, Loose connections

The soil heat flow #1 sensor went offscale low on occasion.  This sometimes caused 
sensible and latent heat fluxes to be 9999ed out by the EBBR programming, but not always.

• 5 cm soil heat flow, site 1(shf1)
• soil heat flow, site 1(g1)
• h(h)
• latent heat flux(e)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)

• Soil heat flow 1(mv_hft1)

SGP/EBBR/E9 - Wind Speed Incorrect

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

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

SGP/EBBR/E13 - Left Air Temperature Incorrect - Fluxes Affected

The left air temperature was incorrect, thus the Bowen ratio and sensible and latent heat 
fluxes were incorrect also.

• Left air temperature(tair_l)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• bottom air temperature(tair_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top air temperature(tair_top)
• latent heat flux(e)
• h(h)

SGP/EBBR/E13 - Fluxes Incorrect, AEM Problems

The AEM did not function properly, thus sensible and latent heat fluxes were incorrect.

• Left air temperature(tair_l)
• Right air temperature(tair_r)

• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)
• top air temperature(tair_top)
• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)

• Bottom humidity(hum_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Temperature of the top humidity chamber(thum_top)
• latent heat flux(e)
• h(h)
• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• top vapor pressure(vp_top)

SGP/EBBR/E20 - Net Radiation, Fluxes Too Large

Net Radiation was way too large because of water in the bottom dome.
This resulted in the sensible and latent heat fluxes being too large also.

• latent heat flux(e)
• net radiation(q)
• h(h)

• net radiation(q)

SGP/EBBR/E27 - Field fire burned AEM

A fire in the E27 field burned the AEM, making it non-functional.
Sensible and latent heat fluxes and gradients were incorrect during this period.

• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Home signal(home)
• Top humidity(hum_top)
• bottom vapor pressure(vp_bot)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• Temperature of the top humidity chamber(thum_top)

• Temperature of the top humidity chamber(thum_top)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top air temperature(tair_top)
• latent heat flux(e)
• top vapor pressure(vp_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• bottom air temperature(tair_bot)
• h(h)
• Top humidity(hum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)

• Right air temperature(tair_r)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left air temperature(tair_l)
• Left relative humidity(mv_hum_l)
• Right relative humidity(mv_hum_r)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Home signal(mv_home)

SGP/EBBR/E27 - Sensible, Latent, and Average Soil Heat Fluxes Sometimes Incorrect

The Soil Heat Flow #1 sensor kept going offscale.

Sensible and Latent heat fluxes and the ave_shf were affected and sometimes
incorrect.

• 5 cm soil heat flow, site 1(shf1)
• average surface soil heat flow(ave_shf)
• soil heat flow, site 1(g1)
• h(h)
• latent heat flux(e)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)

• Soil heat flow 1(mv_hft1)

SGP/EBBR/E27 - Low Battery Condition

A low battery condition caused most of the measurements to be incorrect.

• vector wind speed(res_ws)
• net radiation(q)
• Bottom humidity(hum_bot)
• Reference Thermistor Temperature(tref)
• Retrieved pressure profile(pres)
• Top humidity(hum_top)
• scalar wind speed(wind_s)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• wind direction (relative to true north)(wind_d)
• Home signal(home)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• time(time)
• top air temperature(tair_top)
• bottom vapor pressure(vp_bot)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• 0-5 cm change in soil heat storage with time, site 2(ces1)
• Reference Thermistor Temperature(tref)
• Temperature of the top humidity chamber(thum_top)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• volumetric soil moisture, site 5(sm5)
• net radiation(q)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• vector wind speed(res_ws)
• 5 cm soil heat flow, site 5(shf5)
• volumetric soil moisture, site 1(sm1)
• volumetric soil moisture, site 4(sm4)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• soil heat flow, site 5(g5)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• volumetric soil moisture, site 3(sm3)
• Top humidity(hum_top)
• soil heat flow, site 2(g2)
• soil heat flow, site 1(g1)
• top vapor pressure(vp_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• Bottom humidity(hum_bot)
• bottom air temperature(tair_bot)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 0-5 cm integrated soil temperature, site 2(ts1)
• soil heat flow, site 4(g4)
• wind direction (relative to true north)(wind_d)
• Soil heat capacity 5(cs5)
• Soil heat capacity 1(cs1)
• Soil heat capacity 4(cs4)
• 0-5 cm integrated soil temperature, site 5(ts5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• latent heat flux(e)
• Retrieved pressure profile(pres)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Soil heat capacity 2(cs2)
• Soil heat capacity 3(cs3)
• bottom vapor pressure(vp_bot)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• top air temperature(tair_top)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow, site 3(shf3)
• volumetric soil moisture, site 2(sm2)
• scalar wind speed(wind_s)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 5 cm soil heat flow, site 1(shf1)
• average surface soil heat flow(ave_shf)
• h(h)
• Temperature of bottom humidity sensor chamber(thum_bot)

• Soil moisture 5(r_sm5)
• Reference temperature(rr_tref)
• Left air temperature(tair_l)
• Soil temperature 3(rr_ts3)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil temperature 4(rr_ts4)
• Soil moisture 2(r_sm2)
• scalar wind speed(wind_s)
• Soil temperature 5(rr_ts5)
• Right air temperature(tair_r)
• Soil moisture 3(r_sm3)
• Left relative humidity(mv_hum_l)
• Soil moisture 4(r_sm4)
• Soil heat flow 1(mv_hft1)
• Net radiation(mv_q)
• Soil heat flow 3(mv_hft3)
• Soil heat flow 4(mv_hft4)
• Soil heat flow 5(mv_hft5)
• Right relative humidity(mv_hum_r)
• Soil temperature 1(rr_ts1)
• Atmospheric pressure(mv_pres)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil moisture 1(r_sm1)
• Soil temperature 2(rr_ts2)
• Wind direction (relative to true north)(mv_wind_d)
• Soil heat flow 2(mv_hft2)
• Home signal(mv_home)

SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect When Pressure Offscale

There were several half hours during this period when the pressure went offscale or at 
least to a high value, causing the sensible and latent heat fluxes to be incorrect.

• Atmospheric pressure(mv_pres)

• Retrieved pressure profile(pres)

• Retrieved pressure profile(pres)
• latent heat flux(e)
• h(h)

SGP/EBBR/E27 - Most Measurements Suspect

The wrong EBBR program was used at this site.  Therefore, most of the measurements are 
suspect.

Note: Mentor reports reprocessing will not correct this problem.

• vector wind speed(res_ws)
• net radiation(q)
• Dummy altitude for Zeb(alt)
• Bottom humidity(hum_bot)
• Reference Thermistor Temperature(tref)
• Retrieved pressure profile(pres)
• Top humidity(hum_top)
• lat(lat)
• Time offset of tweaks from base_time(time_offset)
• scalar wind speed(wind_s)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• wind direction (relative to true north)(wind_d)
• Home signal(home)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• time(time)
• base time(base_time)
• top air temperature(tair_top)
• lon(lon)
• bottom vapor pressure(vp_bot)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• 0-5 cm change in soil heat storage with time, site 2(ces1)
• Reference Thermistor Temperature(tref)
• Temperature of the top humidity chamber(thum_top)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• volumetric soil moisture, site 5(sm5)
• net radiation(q)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• vector wind speed(res_ws)
• 5 cm soil heat flow, site 5(shf5)
• volumetric soil moisture, site 4(sm4)
• volumetric soil moisture, site 1(sm1)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• soil heat flow, site 5(g5)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• volumetric soil moisture, site 3(sm3)
• Top humidity(hum_top)
• soil heat flow, site 2(g2)
• soil heat flow, site 1(g1)
• top vapor pressure(vp_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• Bottom humidity(hum_bot)
• bottom air temperature(tair_bot)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 0-5 cm integrated soil temperature, site 2(ts1)
• lat(lat)
• soil heat flow, site 4(g4)
• wind direction (relative to true north)(wind_d)
• Dummy altitude for Zeb(alt)
• Soil heat capacity 5(cs5)
• Soil heat capacity 1(cs1)
• Soil heat capacity 4(cs4)
• 0-5 cm integrated soil temperature, site 5(ts5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• latent heat flux(e)
• base time(base_time)
• Retrieved pressure profile(pres)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Soil heat capacity 2(cs2)
• Soil heat capacity 3(cs3)
• bottom vapor pressure(vp_bot)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• top air temperature(tair_top)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow, site 3(shf3)
• volumetric soil moisture, site 2(sm2)
• scalar wind speed(wind_s)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 5 cm soil heat flow, site 1(shf1)
• average surface soil heat flow(ave_shf)
• h(h)
• Temperature of bottom humidity sensor chamber(thum_bot)

• Soil moisture 5(r_sm5)
• Reference temperature(rr_tref)
• Battery(bat)
• Left air temperature(tair_l)
• lat(lat)
• Soil temperature 3(rr_ts3)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil temperature 4(rr_ts4)
• Soil moisture 2(r_sm2)
• lon(lon)
• scalar wind speed(wind_s)
• Soil temperature 5(rr_ts5)
• Right air temperature(tair_r)
• Soil moisture 3(r_sm3)
• Left relative humidity(mv_hum_l)
• base time(base_time)
• Soil moisture 4(r_sm4)
• Time offset of tweaks from base_time(time_offset)
• Soil heat flow 1(mv_hft1)
• Net radiation(mv_q)
• Soil heat flow 3(mv_hft3)
• Soil heat flow 4(mv_hft4)
• Soil heat flow 5(mv_hft5)
• Right relative humidity(mv_hum_r)
• Soil temperature 1(rr_ts1)
• Atmospheric pressure(mv_pres)
• Signature(signature)
• Dummy altitude for Zeb(alt)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil moisture 1(r_sm1)
• Soil temperature 2(rr_ts2)
• Wind direction (relative to true north)(mv_wind_d)
• Soil heat flow 2(mv_hft2)
• Home signal(mv_home)

SGP/EBBR/E27 - Battery Voltage Problem - Measurements Incorrect

Battery voltage was too low much of the time during the period, thus most measurements 
were incorrect during much of the time period.

• vector wind speed(res_ws)
• net radiation(q)
• Bottom humidity(hum_bot)
• Reference Thermistor Temperature(tref)
• Retrieved pressure profile(pres)
• Top humidity(hum_top)
• scalar wind speed(wind_s)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• wind direction (relative to true north)(wind_d)
• Home signal(home)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• bottom vapor pressure(vp_bot)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• 0-5 cm change in soil heat storage with time, site 2(ces1)
• Reference Thermistor Temperature(tref)
• Temperature of the top humidity chamber(thum_top)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• volumetric soil moisture, site 5(sm5)
• net radiation(q)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• vector wind speed(res_ws)
• 5 cm soil heat flow, site 5(shf5)
• volumetric soil moisture, site 1(sm1)
• volumetric soil moisture, site 4(sm4)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• soil heat flow, site 5(g5)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• volumetric soil moisture, site 3(sm3)
• Top humidity(hum_top)
• soil heat flow, site 2(g2)
• soil heat flow, site 1(g1)
• top vapor pressure(vp_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• Bottom humidity(hum_bot)
• bottom air temperature(tair_bot)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 0-5 cm integrated soil temperature, site 2(ts1)
• soil heat flow, site 4(g4)
• wind direction (relative to true north)(wind_d)
• Soil heat capacity 5(cs5)
• Soil heat capacity 1(cs1)
• Soil heat capacity 4(cs4)
• 0-5 cm integrated soil temperature, site 5(ts5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• latent heat flux(e)
• Retrieved pressure profile(pres)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Soil heat capacity 2(cs2)
• Soil heat capacity 3(cs3)
• bottom vapor pressure(vp_bot)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• top air temperature(tair_top)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow, site 3(shf3)
• volumetric soil moisture, site 2(sm2)
• scalar wind speed(wind_s)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 5 cm soil heat flow, site 1(shf1)
• average surface soil heat flow(ave_shf)
• h(h)
• Temperature of bottom humidity sensor chamber(thum_bot)

• Soil moisture 5(r_sm5)
• Reference temperature(rr_tref)
• Left air temperature(tair_l)
• Soil temperature 3(rr_ts3)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil temperature 4(rr_ts4)
• Soil moisture 2(r_sm2)
• scalar wind speed(wind_s)
• Soil temperature 5(rr_ts5)
• Right air temperature(tair_r)
• Soil moisture 3(r_sm3)
• Left relative humidity(mv_hum_l)
• Soil moisture 4(r_sm4)
• Soil heat flow 1(mv_hft1)
• Net radiation(mv_q)
• Soil heat flow 3(mv_hft3)
• Soil heat flow 4(mv_hft4)
• Soil heat flow 5(mv_hft5)
• Right relative humidity(mv_hum_r)
• Soil temperature 1(rr_ts1)
• Atmospheric pressure(mv_pres)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil moisture 1(r_sm1)
• Soil temperature 2(rr_ts2)
• Wind direction (relative to true north)(mv_wind_d)
• Soil heat flow 2(mv_hft2)
• Home signal(mv_home)

SGP/EBBR/E18 - Sensible and Latent Heat Fluxes and Net Radiation Incorrect

The net radiometer dome was cracked and water had gotten in, resulting in incorrect net 
radiation measurements and therefore incorrect sensible and latent heat flux measurements.

• net radiation(q)

• latent heat flux(e)
• net radiation(q)
• h(h)

• Net radiation(mv_q)

SGP/EBBR/E8 - Sensible and Latent Heat Fluxes and Net Radiation Incorrect

The net radiometer top dome was broken and water had gotten into it.

Sensible and latent heat fluxes and net radiation were therefore incorrect.

• latent heat flux(e)
• net radiation(q)
• h(h)

• net radiation(q)

• Net radiation(mv_q)

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_q)

• net radiation(q)

• latent heat flux(e)
• net radiation(q)
• h(h)

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 temperature 1(rr_ts1)

• Soil heat capacity 1(cs1)
• 0-5 cm integrated soil temperature, site 2(ts1)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• soil heat flow, site 1(g1)

SGP/EBBR/E13 - Soil Heat Flow #3 Large Negative

During this period Soil Heat Flow #3 was sometimes incorrect (large negative); during 
those times, sensible and latent heat fluxes and average soil heat flux were sometimes (but 
not always incorrect).

• Soil heat flow 3(mv_hft3)

• soil heat flow, site 3(g3)
• 5 cm soil heat flow, site 3(shf3)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)
• h(h)

SGP/EBBR/E13 - Pressure and Sensible and Latent Heat Fluxes Incorrect

During spikes in pressure upwards or downwards the sensible and latent heat fluxes were 
incorrect.

• Atmospheric pressure(mv_pres)

• Retrieved pressure profile(pres)

• Retrieved pressure profile(pres)
• latent heat flux(e)
• h(h)

SGP/EBBR/E13 - Most Measurements Incorrect When Battery Voltage Too low

Most measurements were incorrect during this period because the battery voltage was below 
10.5 volts.

• Soil moisture 2(r_sm2)
• Soil heat flow 2(mv_hft2)
• Soil moisture 3(r_sm3)
• Soil heat flow 3(mv_hft3)
• Soil moisture 4(r_sm4)
• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 1(r_sm1)
• Home signal(mv_home)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left relative humidity(mv_hum_l)
• Soil moisture 5(r_sm5)
• Reference temperature(rr_tref)
• Net radiation(mv_q)
• Temperature of left humidity sensor chamber(rr_thum_l)
• scalar wind speed(wind_s)
• Soil heat flow 1(mv_hft1)
• Soil heat flow 4(mv_hft4)
• Soil temperature 3(rr_ts3)
• Soil temperature 4(rr_ts4)
• Soil temperature 5(rr_ts5)
• Right relative humidity(mv_hum_r)
• Soil heat flow 5(mv_hft5)
• Soil temperature 2(rr_ts2)
• Left air temperature(tair_l)
• Atmospheric pressure(mv_pres)
• Soil temperature 1(rr_ts1)
• Right air temperature(tair_r)

• Home signal(home)
• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• net radiation(q)
• vector wind speed(res_ws)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• Retrieved pressure profile(pres)
• scalar wind speed(wind_s)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)

• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• Soil heat capacity 4(cs4)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow, site 4(shf4)
• top vapor pressure(vp_top)
• volumetric soil moisture, site 4(sm4)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• volumetric soil moisture, site 5(sm5)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• soil heat flow, site 3(g3)
• Reference Thermistor Temperature(tref)
• bottom air temperature(tair_bot)
• soil heat flow, site 2(g2)
• 0-5 cm integrated soil temperature, site 2(ts1)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• h(h)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• volumetric soil moisture, site 2(sm2)
• 5 cm soil heat flow, site 1(shf1)
• scalar wind speed(wind_s)
• Top humidity(hum_top)
• top air temperature(tair_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Soil heat capacity 3(cs3)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• wind direction (relative to true north)(wind_d)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• vector wind speed(res_ws)
• Bottom humidity(hum_bot)
• Retrieved pressure profile(pres)
• soil heat flow, site 1(g1)
• soil heat flow, site 4(g4)
• 0-5 cm integrated soil temperature, site 5(ts5)
• Soil heat capacity 2(cs2)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• latent heat flux(e)
• Soil heat capacity 1(cs1)
• net radiation(q)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow, site 3(shf3)
• volumetric soil moisture, site 1(sm1)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 5 cm soil heat flow, site 5(shf5)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm integrated soil temperature, site 2(ts2)
• soil heat flow, site 5(g5)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 0-5 cm integrated soil temperature, site 4(ts4)
• Soil heat capacity 5(cs5)
• 0-5 cm change in soil heat storage with time, site 5(ces5)

SGP/EBBR/E22 - Net Radiation and Sensible and Latent Heat Fluxes Incorrect

Rain entered the net radiometer, causing net radiation, and thus sensible and latent heat 
fluxes, to be too large.

• net radiation(q)

• h(h)
• net radiation(q)
• latent heat flux(e)

• Net radiation(mv_q)

SGP/EBBR/E4 - Soil Heat Flow #2 Incorrect at times

Soil Heat Flow #2 sometimes dropped to large negative values during daytime.

• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• h(h)
• soil heat flow, site 2(g2)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)

• Soil heat flow 2(mv_hft2)

SGP/EBBR/E18 - Sensible and Latent Heat Fluxes Incorrect

Sensible and latent heat fluxes were incorrect during this period because the AEM was not 
exchanging.

• top air temperature(tair_top)
• bottom air temperature(tair_bot)
• latent heat flux(e)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• Top humidity(hum_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Bottom humidity(hum_bot)

SGP/EBBR/E22 - Soil Heat Flow #4 Incorrect - Sensible and Latent Heat Fluxes Sometimes 
Affected

Soil heat flow sensor #4 dropped to low values or offscale.

Sensible and latent heat fluxes were sometimes affected.

• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• soil heat flow, site 4(g4)
• h(h)
• 5 cm soil heat flow, site 4(shf4)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)

• Soil heat flow 4(mv_hft4)

SGP/EBBR/E13 - Battery failure

Data was missing entirely on parts of 10/22 and 10/23.

• Soil moisture 2(r_sm2)
• Soil heat flow 2(mv_hft2)
• Soil moisture 3(r_sm3)
• Soil heat flow 3(mv_hft3)
• Soil moisture 4(r_sm4)
• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 1(r_sm1)
• Home signal(mv_home)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left relative humidity(mv_hum_l)
• Soil moisture 5(r_sm5)
• Reference temperature(rr_tref)
• Net radiation(mv_q)
• Temperature of left humidity sensor chamber(rr_thum_l)
• scalar wind speed(wind_s)
• Soil heat flow 1(mv_hft1)
• Soil heat flow 4(mv_hft4)
• Soil temperature 3(rr_ts3)
• Soil temperature 4(rr_ts4)
• Soil temperature 5(rr_ts5)
• Right relative humidity(mv_hum_r)
• Soil heat flow 5(mv_hft5)
• Soil temperature 2(rr_ts2)
• Left air temperature(tair_l)
• Atmospheric pressure(mv_pres)
• Soil temperature 1(rr_ts1)
• Right air temperature(tair_r)

• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• net radiation(q)
• vector wind speed(res_ws)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• Retrieved pressure profile(pres)
• scalar wind speed(wind_s)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)

• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• Soil heat capacity 4(cs4)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow, site 4(shf4)
• top vapor pressure(vp_top)
• volumetric soil moisture, site 4(sm4)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• volumetric soil moisture, site 5(sm5)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• soil heat flow, site 3(g3)
• Reference Thermistor Temperature(tref)
• bottom air temperature(tair_bot)
• soil heat flow, site 2(g2)
• 0-5 cm integrated soil temperature, site 2(ts1)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• h(h)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• volumetric soil moisture, site 2(sm2)
• 5 cm soil heat flow, site 1(shf1)
• scalar wind speed(wind_s)
• Top humidity(hum_top)
• top air temperature(tair_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Soil heat capacity 3(cs3)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• wind direction (relative to true north)(wind_d)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• vector wind speed(res_ws)
• Bottom humidity(hum_bot)
• Retrieved pressure profile(pres)
• soil heat flow, site 1(g1)
• soil heat flow, site 4(g4)
• 0-5 cm integrated soil temperature, site 5(ts5)
• Soil heat capacity 2(cs2)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• latent heat flux(e)
• Soil heat capacity 1(cs1)
• net radiation(q)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow, site 3(shf3)
• volumetric soil moisture, site 1(sm1)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 5 cm soil heat flow, site 5(shf5)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm integrated soil temperature, site 2(ts2)
• soil heat flow, site 5(g5)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 0-5 cm integrated soil temperature, site 4(ts4)
• Soil heat capacity 5(cs5)
• 0-5 cm change in soil heat storage with time, site 5(ces5)

SGP/EBBR/E19 - Sensible and Latent Heat Fluxes Incorrect

The sensible and latent heat fluxes were incorrect when the top and bottom air 
temperatures were incorrect.

• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• latent heat flux(e)
• bottom air temperature(tair_bot)
• top air temperature(tair_top)

SGP/EBBR/E2 - Missing data

Data are missing and unrecoverable

• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• Dummy altitude for Zeb(alt)
• Bottom humidity(hum_bot)
• scalar wind speed(wind_s)
• vector wind speed(res_ws)
• Retrieved pressure profile(pres)
• Time offset of tweaks from base_time(time_offset)
• time(time)
• bottom air temperature(tair_bot)
• lon(lon)
• Home signal(home)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• Reference Thermistor Temperature(tref)
• top air temperature(tair_top)
• lat(lat)
• net radiation(q)
• top vapor pressure(vp_top)
• Top humidity(hum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• base time(base_time)

• Wind direction (relative to true north)(mv_wind_d)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Dummy altitude for Zeb(alt)
• Soil heat flow 5(mv_hft5)
• Soil temperature 1(rr_ts1)
• Time offset of tweaks from base_time(time_offset)
• Soil temperature 4(rr_ts4)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil temperature 5(rr_ts5)
• Soil heat flow 2(mv_hft2)
• Left relative humidity(mv_hum_l)
• Soil heat flow 3(mv_hft3)
• Left air temperature(tair_l)
• lon(lon)
• scalar wind speed(wind_s)
• Soil moisture 3(r_sm3)
• Soil temperature 3(rr_ts3)
• Soil moisture 5(r_sm5)
• lat(lat)
• Atmospheric pressure(mv_pres)
• Soil heat flow 1(mv_hft1)
• Soil temperature 2(rr_ts2)
• base time(base_time)
• Home signal(mv_home)
• Signature(signature)
• Right relative humidity(mv_hum_r)
• Net radiation(mv_q)
• Soil moisture 1(r_sm1)
• Soil heat flow 4(mv_hft4)
• Battery(bat)
• Right air temperature(tair_r)
• Soil moisture 4(r_sm4)
• Reference temperature(rr_tref)
• Soil moisture 2(r_sm2)

• Soil heat capacity 2(cs2)
• soil heat flow, site 3(g3)
• scalar wind speed(wind_s)
• 5 cm soil heat flow, site 1(shf1)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• 0-5 cm integrated soil temperature, site 2(ts1)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• Retrieved pressure profile(pres)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• wind direction (relative to true north)(wind_d)
• 0-5 cm integrated soil temperature, site 5(ts5)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• lon(lon)
• 5 cm soil heat flow, site 4(shf4)
• volumetric soil moisture, site 5(sm5)
• 0-5 cm integrated soil temperature, site 2(ts2)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• top vapor pressure(vp_top)
• Dummy altitude for Zeb(alt)
• 0-5 cm integrated soil temperature, site 3(ts3)
• volumetric soil moisture, site 4(sm4)
• base time(base_time)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Bottom humidity(hum_bot)
• Time offset of tweaks from base_time(time_offset)
• average surface soil heat flow(ave_shf)
• volumetric soil moisture, site 3(sm3)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Soil heat capacity 3(cs3)
• lat(lat)
• latent heat flux(e)
• Soil heat capacity 4(cs4)
• 5 cm soil heat flow, site 5(shf5)
• vector wind speed(res_ws)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• net radiation(q)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• bottom vapor pressure(vp_bot)
• h(h)
• volumetric soil moisture, site 1(sm1)
• volumetric soil moisture, site 2(sm2)
• Soil heat capacity 1(cs1)
• soil heat flow, site 1(g1)
• Soil heat capacity 5(cs5)
• soil heat flow, site 2(g2)
• Top humidity(hum_top)
• 5 cm soil heat flow, site 3(shf3)
• Reference Thermistor Temperature(tref)
• 5 cm soil heat flow, site 2(shf2)
• bottom air temperature(tair_bot)
• soil heat flow, site 4(g4)
• soil heat flow, site 5(g5)
• Temperature of the top humidity chamber(thum_top)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• Exchange mechanism position indicator (15 to 30 min)(home_30)

SGP/EBBR/E2 - Windspeed sensor failure

The windspeed sensor developed an abnormally high wind speed threshold due to worn 
bearings.

Wind speeds were often measured to be too low.  Inspect the data to identify suspect time 
periods.

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

SGP/EBBR/E7 - Windspeed threshhold too high

The wind speed sensor developed worn bearings and therefore too high a starting 
threshhold.

The data user should compare the EBBR wind speed with the SMOS wind speed to detect 
periods when the EBBR wind speed threshhold caused poor data quality.

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)

SGP/EBBR/E8 - Failed Temp/RH sensor

The right Temperature-Humidity sensor failed. The measured temperature gradients were 
incorrect and thus the sensible and latent heat fluxes were incorrect for this extended 
period.

The sensor was replaced March 6.

• top vapor pressure(vp_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• latent heat flux(e)
• Temperature of the top humidity chamber(thum_top)
• h(h)
• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)

• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom vapor pressure(vp_bot)
• top vapor pressure(vp_top)

• Temperature of right humidity sensor chamber(rr_thum_r)

SGP/EBBR/E4 - Wind Direction Stuck at Zero

The wind direction sensor was stuck at zero.

• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• vector wind speed(res_ws)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• Wind direction (relative to true north)(mv_wind_d)

SGP/EBBR/E22 - Wind Direction Incorrect

Wind direction was flat-lining at 135 degrees and occasionally changed to 0.4 degrees.

• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• Wind direction (relative to true north)(mv_wind_d)

SGP/EBBR/E4 - Instrument problem

Wind direction was flat lining near zero and incorrect.

• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• Wind direction (relative to true north)(mv_wind_d)

SGP/EBBR/E20 - Reprocess: Wind Direction 20 Degrees Low

The EBBR wind direction was found to be misaligned 20 degrees low. 

This bias should have had no effect on the res_ws or sigma_wd measurements.

• wind direction (relative to true north)(wind_d)

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)

SGP/EBBR/E27 - Multiplexer #2 failure

A problem with the #2 Multiplexer caused a large number of measurements to be incorrect.  
Sensible and latent heat fluxes were often affected.

• Exchange mechanism position indicator (0 to 15 min)(home_15)
• net radiation(q)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• latent heat flux(e)
• 5 cm soil heat flow, site 5(shf5)
• soil heat flow, site 5(g5)
• soil heat flow, site 3(g3)
• bottom vapor pressure(vp_bot)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Top humidity(hum_top)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• soil heat flow, site 2(g2)
• top air temperature(tair_top)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 2(shf2)
• top vapor pressure(vp_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow, site 3(shf3)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 5 cm soil heat flow, site 4(shf4)
• Bottom humidity(hum_bot)
• 5 cm soil heat flow, site 1(shf1)
• bottom air temperature(tair_bot)
• average surface soil heat flow(ave_shf)
• h(h)
• soil heat flow, site 4(g4)

• net radiation(q)
• Bottom humidity(hum_bot)
• Home signal(home)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Retrieved pressure profile(pres)
• Top humidity(hum_top)
• bottom vapor pressure(vp_bot)

• Soil heat flow 1(mv_hft1)
• Net radiation(mv_q)
• Left air temperature(tair_l)
• Soil heat flow 3(mv_hft3)
• Soil heat flow 4(mv_hft4)
• Soil heat flow 5(mv_hft5)
• Right relative humidity(mv_hum_r)
• Atmospheric pressure(mv_pres)
• Right air temperature(tair_r)
• Left relative humidity(mv_hum_l)
• Soil heat flow 2(mv_hft2)
• Home signal(mv_home)

SGP/EBBR/E4 - Wind Direction Incorrect

The EBBR wind direction sat at about 60 degrees from 08/09 0230 GMT through 08/24 1930 GMT 
and was incorrect.

• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• vector wind speed(res_ws)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• Wind direction (relative to true north)(mv_wind_d)

SGP/EBBR/E22 - H and LE Incorrect

Soil Heat Flow 1 bounced around and went offscale at times, resulting in the EBBR program 
setting sensible and latent heat fluxes to 9999es.

The problem ended during a PM visit, possibly because of routine checks and tightening of 
leads in terminal strips.

• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 1(shf1)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)

• Soil heat flow 1(mv_hft1)

SGP/EBBR/E13 - Radiometer dome broken

The top net radiometer dome was broken, yielding net radiation, sensible heat flux and 
latent heat flux that were too low.

The BEFLUX (SIRS) net radiation can be used as a replacement for the EBBR net radiation.

To correct the sensible and latent heat fluxes, determine the ratio of SIRS net radiation 
to EBBR net radiation for each daylight half hour and multiply that ratio times H and LE 
to obtain approximate corrected flux values.

• Net radiation(mv_q)

• net radiation(q)

• net radiation(q)
• latent heat flux(e)
• h(h)

SGP/EBBR/E26 - Sensible and Latent Heat Fluxes Affected by bad temp sensor

The left Thum (temperature of the humidity sensor chamber) measurement was incorrect at 
times, affecting several measurements, including the sensible and latent heat fluxes.

• Temperature of left humidity sensor chamber(rr_thum_l)

• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)

• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• latent heat flux(e)
• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• h(h)

SGP/EBBR/E20 - Reprocess: Wind Direction 65 Degrees Low

The wind direction sensor reported wind directions that were 65 degrees too low because of 
a mis-alignment.

This bias should have no effect on the res_ws or sigma_wd measurements.

The wind direction data could be re-processed by adding 65 degrees.

• wind direction (relative to true north)(wind_d)

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)

SGP/EBBR/E9 - Net Radiation Incorrect

There was water in the net radiometer.  

The net radiation data was incorrect.

• Net radiation(mv_q)

• net radiation(q)

• latent heat flux(e)
• h(h)
• net radiation(q)

SGP/EBBR/E27 - Measurements offscale

All J-panel 4 measurements (soil heat flows, net radiation, air temperatures, home 
signals, pressure, vapor pressure) were sometimes offscale or otherwise incorrect.  J-Panel was 
replaced 20080326 correcting the problem.

• net radiation(q)
• top air temperature(tair_top)
• Retrieved pressure profile(pres)
• Home signal(home)
• bottom vapor pressure(vp_bot)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)

• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• soil heat flow, site 2(g2)
• net radiation(q)
• top air temperature(tair_top)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• soil heat flow, site 1(g1)
• latent heat flux(e)
• Retrieved pressure profile(pres)
• 5 cm soil heat flow, site 5(shf5)
• top vapor pressure(vp_top)
• 5 cm soil heat flow, site 2(shf2)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow, site 3(shf3)
• soil heat flow, site 5(g5)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 3(g3)
• bottom air temperature(tair_bot)
• bottom vapor pressure(vp_bot)
• 5 cm soil heat flow, site 1(shf1)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• h(h)
• soil heat flow, site 4(g4)

• Right air temperature(tair_r)
• Soil heat flow 1(mv_hft1)
• Net radiation(mv_q)
• Left air temperature(tair_l)
• Soil heat flow 3(mv_hft3)
• Soil heat flow 4(mv_hft4)
• Soil heat flow 5(mv_hft5)
• Soil heat flow 2(mv_hft2)
• Atmospheric pressure(mv_pres)
• Home signal(mv_home)

SGP/EBBR/E7  - Wind Speed Frozen Stopped

Freezing rain stopped wind speed sensor.

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)

SGP/EBBR/E13 - Wind direction failure

The EBBR wind direction was stuck at 135 degrees; this reading indicates a failure of the 
sensor electronics.

• Wind direction (relative to true north)(mv_wind_d)

• vector wind speed(res_ws)
• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)

SGP/EBBR/E20 - Wind Direction 50 Degrees High

The wind direction was offset high about 50 degrees.

• wind direction (relative to true north)(wind_d)

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)

SGP/EBBR/E4 - AEM Blown Fuse, Sensible and Latent Heat Fluxes Incorrect

The AEM Fuse was blown, the AEM was not switching, and thus sensible and latent heat flux 
measurements were incorrect.

• h(h)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• latent heat flux(e)

SGP/EBBR/E18 - Soil Heat Flow #4 Offscale Low; Sensible and Latent Heat Flux Sometimes 
Incorrect

Soil heat flow #4 was sometimes lower than the lower limit imposed in the EBBR 
programming; sensible and latent heat flux were therefore deemed to be suspect during those times.  
The cause of the low values is not clear, but the values are not reasonable for the 
vegetation type at EF18.

• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow, site 4(shf4)
• latent heat flux(e)
• soil heat flow, site 1(g1)
• h(h)
• soil heat flow, site 4(g4)
• average surface soil heat flow(ave_shf)

• Soil heat flow 4(mv_hft4)

SGP/EBBR/E4 - Reprocess: Wind Direction Incorrect

The wind direction was misaligned by 180 degrees. If the wind direction was 180 degrees or 
less, add 180 degrees to give the correct direction.  If the wind direction was greater 
than 180 degrees, subtract 180 degrees to give the correct direction.

• wind direction (relative to true north)(wind_d)

• wind direction (relative to true north)(wind_d)

• Wind direction (relative to true north)(mv_wind_d)

SGP/EBBR/E8 - Wind Direction Incorrect

The wind direction flatlined at times at 135 degrees (an indication of failed electronics) 
and at other times trended correctly with the co-located SMOS but differed from it by 15 
to 100 degrees.

• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)

• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• Wind direction (relative to true north)(mv_wind_d)

SGP/EBBR/E2 - Net Radiation and Fluxes Incorrect

The net radiometer was tipped 37 degrees eastward, resulting in apparent
solar noon being 2.5 hours early.  The net radiation error results in incorrect sensible 
and latent heat fluxes.

• h(h)
• latent heat flux(e)
• net radiation(q)

• Net radiation(mv_q)

• net radiation(q)

SGP/EBBR/E19 - Sensible and latent heat flux and net radiation incorrect

Net radiation was too large, resulting in sensible and latent heat fluxes being too large. 
 The cause of the problem is unknown.

• net radiation(q)

• Net radiation(mv_q)

• h(h)
• latent heat flux(e)
• net radiation(q)

SGP/EBBR/E2 - AEM Ventilator Dangling - Sensible and Latent Heat Fluxes Incorrect

The right AEM ventilator unit with temperature and humidity sensors inside was dangling 
from the AEM.  Therefore, the gradients of temperature and relative humidity and thus 
sensible and latent heat flux are suspect for this period.  Often, the fluxes look reasonable.

• Right air temperature(tair_r)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Right relative humidity(mv_hum_r)

• Temperature of the top humidity chamber(thum_top)
• top air temperature(tair_top)
• top vapor pressure(vp_top)
• Top humidity(hum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Bottom humidity(hum_bot)
• bottom air temperature(tair_bot)
• bottom vapor pressure(vp_bot)

• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• bottom vapor pressure(vp_bot)
• bottom air temperature(tair_bot)
• latent heat flux(e)
• h(h)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Bottom humidity(hum_bot)
• top vapor pressure(vp_top)
• Temperature of the top humidity chamber(thum_top)
• Top humidity(hum_top)

SGP/EBBR/E15 - Water in dome

There was water in the bottom dome of the net radiometer.

Net radiation, and sensible and latent heat fluxes were 
incorrect during the period.

• Net radiation(mv_q)

• net radiation(q)
• latent heat flux(e)
• h(h)

• net radiation(q)

SGP/EBBR/E15 - Soil Heat Flow #4 Incorrect

Soil heat flux #4 produced too large a soil heat flow at times, resulting in it exceeding 
the qc check limit and causing sensible and latent heat fluxes to be incorrect.

• Soil heat flow 4(mv_hft4)

• latent heat flux(e)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• average surface soil heat flow(ave_shf)
• soil heat flow, site 4(g4)
• h(h)

SGP/EBBR/E18 - SHF #4 Measurements Too Low; Sensible and Latent Heat Fluxes Suspect

Soil heat flow #4 was replaced at the beginning of this period.  However, the soil heat 
flow measurements from that sensor were sometimes still lower than the lower limit imposed 
in the EBBR programming; sensible and latent heat flux were therefore deemed to be 
suspect during those times.  The cause of the low values could not be determined, but the 
values are not reasonable for the vegetation type at EF18.  

To remedy the situation, the soil heat flow sensor calibration was changed so that the 
sensor provided measurements that resembled the other four soil heat flow sensor 
measurements.

Soil heat flow measurements have been reasonable since the calibration change.

• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow, site 4(shf4)
• latent heat flux(e)
• h(h)
• soil heat flow, site 4(g4)
• average surface soil heat flow(ave_shf)

• Soil heat flow 4(mv_hft4)

SGP/EBBR/E20 - Wind Direction Incorrect

The wind direction differed from the co-located SMOS by 50 deg during part of the stated 
period and the electronics had failed completely resulting in a constant 135 degrees for 
the following dates and times:
08/15 0230-0430, 0830-1530 and 09/03 0200-0300, 0500 - 09/10 2230.

Sensible and latent heat fluxes were not affected by this problem.

• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)