SGP/SMOS/E1 - 6-month Calibration Checks

During the time periods specified, the SMOS.E1 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.

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

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

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

SGP/SMOS/E1 - Failed temperature probe

The temperature probe was out of tolerance as it failed the 6-month calibration checks and 
subsequent bi-weekly checks.  The temperature values consistently were outside the 
manufacturers suggested uncertainty of 0.2 C.

• Environmental Temperature (hybrid-b grid)(temp)
• Vapor Pressure (kiloPascals)(vap_pres)

• Environmental Temperature (hybrid-b grid)(temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• Standard deviation of Vapor Pressure(sd_vap_pres)

• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Vapor Pressure(max_vap_pres)
• Minimum Temperature(min_temp)
• Time of Maximum Temperature(time_max_temp)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Temperature(max_temp)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Minimum Temperature(time_min_temp)