SGP/SMOS/E3 - 6-month Calibration Checks

During the time periods specified, the SMOS.E3 tower was lowered for 6-month Calibration 
Checks.   During these times wind data are incorrect and temperature and humidity data may 
be incorrect.

Note, exact times when tower was down or maintenance was being performed is sometimes 
unknown.  Users should use the remaining data from these days with caution.

Calibration results are available from the OMIS database at 
    
http://www.ops.sgp.arm.gov:591/smos6cal/default.htm 
To view all 6-month calibration reports leave the date time entry blank.

• Wind Speed (vector averaged)(wspd_va)
• Relative humidity scaled, by total column amount from MWR(rh)
• barometric pressure(bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Environmental Temperature (hybrid-b grid)(temp)
• Unit Vector Wind Direction(wdir)
• surface wind speed(wspd)
• Standard Deviation of wind direction(sd_deg)

• Standard deviation of Barometric Pressure(sd_bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Unit Vector Wind Direction(wdir)
• Standard deviation of Vapor Pressure(sd_vap_pres)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)
• barometric pressure(bar_pres)
• surface wind speed(wspd)
• Standard Deviation of Wind Speed(sd_wspd)
• Environmental Temperature (hybrid-b grid)(temp)
• Relative humidity scaled, by total column amount from MWR(rh)
• Standard deviation of Relative Humidity(sd_rh)
• Standard Deviation of Air Temperature(sd_temp)

• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Time of Maximum Temperature(time_max_temp)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• maximum wind speed (gusts)(max_wspd)
• Minimum of Wind speed(min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• Minimum Temperature(min_temp)
• Maximum Barometric Pressure(max_bar_pres)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Minimum Vapor Pressure(min_vap_pres)
• Minimum Barometric Pressure(min_bar_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Wind Speed(time_min_wspd)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Relative Humidity(time_min_rh)
• Time of Minimum Temperature(time_min_temp)
• Maximum Relative Humidity(max_rh)
• Maximum Temperature(max_temp)

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)
• altitude above sea levelaltunits(alt)
• bottom relative humidity(hum_bot)
• scalar wind speed(wind_s)
• Resultant wind speed(res_ws)
• pressure at constant pressure surface(pres)
• Time offset of tweaks from base_time(time_offset)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• bottom air temperature(tair_bot)
• east longitude for all the input platforms.(lon)
• Home signal(home)
• bottom vapor pressure(vp_bot)
• temperature of the top humidity sensor chamber(thum_top)
• Reference Thermistor Temperature(tref)
• top air temperature(tair_top)
• north latitude for all the input platforms.(lat)
• specific humidity(q)
• top vapor pressure(vp_top)
• top relative humidity(hum_top)
• temperature of the bottom humidity sensor chamber(thum_bot)
• Time offset from base_time(base_time)

• Wind direction (relative to true north)(mv_wind_d)
• Temperature of left humidity sensor chamber(rr_thum_l)
• altitude above sea levelaltunits(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)
• east longitude for all the input platforms.(lon)
• scalar wind speed(wind_s)
• Soil moisture 3(r_sm3)
• Soil temperature 3(rr_ts3)
• Soil moisture 5(r_sm5)
• north latitude for all the input platforms.(lat)
• Atmospheric pressure(mv_pres)
• Soil heat flow 1(mv_hft1)
• Soil temperature 2(rr_ts2)
• Time offset from 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 at the surface 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)
• pressure at constant pressure surface(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)
• east longitude for all the input platforms.(lon)
• 5 cm soil heat flow, site 4(shf4)
• Soil moisture 5 (mass water/mass dry soil)(sm5)
• 0-5 cm integrated soil temperature, site 2(ts2)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• top vapor pressure(vp_top)
• altitude above sea levelaltunits(alt)
• 0-5 cm integrated soil temperature, site 3(ts3)
• Soil moisture 4 (mass water/mass dry soil)(sm4)
• Time offset from base_time(base_time)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• bottom relative humidity(hum_bot)
• Time offset of tweaks from base_time(time_offset)
• average surface soil heat flow at the surface(ave_shf)
• Soil moisture 3 (mass water/mass dry soil)(sm3)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Soil heat capacity 3(cs3)
• north latitude for all the input platforms.(lat)
• latent heat flux(e)
• Soil heat capacity 4(cs4)
• 5 cm soil heat flow, site 5(shf5)
• Resultant wind speed(res_ws)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• specific humidity(q)
• temperature of the bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• bottom vapor pressure(vp_bot)
• corrected sensible heat flux(h)
• Soil moisture 1 (mass water/mass dry soil)(sm1)
• Soil moisture 2 (mass water/mass dry soil)(sm2)
• Soil heat capacity 1(cs1)
• soil heat flow at the surface 1(g1)
• Soil heat capacity 5(cs5)
• soil heat flow at the surface 2(g2)
• top relative 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 at the surface 4(g4)
• soil heat flow at the surface 5(g5)
• temperature of the top humidity sensor 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)
• Resultant wind speed(res_ws)

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