SGP/SMOS/E13 - 6-month Calibration Checks

During the time periods specified, the SMOS.E13 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.

• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Time of Minimum Wind Speed(time_min_wspd)
• Highest gust within hour is reported(max_wspd)
• Minimum Wind Speed(min_wspd)
• Humidity, relative, at 60-m height, 24-hr maximum(max_rh)
• Temperature, air, at 60-m height, 24-hr maximum(max_temp)
• Time of Maximum Wind Speed(time_max_wspd)
• Time of Minimum Temperature(time_min_temp)
• Minimum Barometric Pressure(min_bar_pres)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Pressure, vapor, at 60-m height, 24-hr maximum(max_vap_pres)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Pressure, vapor, at 60-m height, 24-hr minimum(min_vap_pres)
• Time of Relative Humidity(time_min_rh)
• Time of Maximum Temperature(time_max_temp)
• Temperature, air, at 60-m height, 24-hr minimum(min_temp)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Humidity, relative, at 60-m height, 24-hr minimum(min_rh)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Barometric Pressure(max_bar_pres)

• Unit Vector Wind Direction(wdir)
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)
• Mean Wind Speed(wspd)
• Humidity, relative(rh)
• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Temperature, air(temp)

• Humidity, relative(rh)
• Temperature, air, 30-min intervals, standard deviation(sd_temp)
• Mean Wind Speed(wspd)
• sd_vap_pres
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Humidity, relative, 30-min intervals, standard deviation(sd_rh)
• Temperature, air(temp)
• sd_bar_pres
• Wind speed, 30-min intervals, standard deviation(sd_wspd)
• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• Unit Vector Wind Direction(wdir)
• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)

SGP/SMOS/E13 - RH sensor failure

The T/RH sensor relative humidity data is suspect during this time.  Values from this 
sensor failed the 6-month check and subsequent bi-weekly checks.  The RH values were lower by 
larger than the manufacturer suggested uncertainty of 3%.

• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Pressure, vapor, at 60-m height, 24-hr minimum(min_vap_pres)
• Humidity, relative, at 60-m height, 24-hr maximum(max_rh)
• Time of Relative Humidity(time_min_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Humidity, relative, at 60-m height, 24-hr minimum(min_rh)
• Time of Maximum Relative Humidity(time_max_rh)
• Pressure, vapor, at 60-m height, 24-hr maximum(max_vap_pres)

• Humidity, relative(rh)
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)

• Humidity, relative(rh)
• sd_vap_pres
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• Humidity, relative, 30-min intervals, standard deviation(sd_rh)

SGP/SMOS/E13 - Wind Data Incorrect Due to Icing

An ice storm caused the wind data from the RM Young wind sensor to be
incorrect.  In many instances it was frozen and unmoving, at times it
measured values but those are extremely suspect.

• Time of Minimum Wind Speed(time_min_wspd)
• Highest gust within hour is reported(max_wspd)
• Minimum Wind Speed(min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)

• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Unit Vector Wind Direction(wdir)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Mean Wind Speed(wspd)

• Wind speed, 30-min intervals, standard deviation(sd_wspd)
• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Mean Wind Speed(wspd)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E13 - Missing Data

Data are missing and unrecoverable

• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Maximum Snow Depth(max_snow)
• Minimum Wind Speed(min_wspd)
• Time of Minimum Snow Depth(time_min_snow)
• Time of Minimum Temperature(time_min_temp)
• Minimum Barometric Pressure(min_bar_pres)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• time_offset
• base_time
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Pressure, vapor, at 60-m height, 24-hr minimum(min_vap_pres)
• Time of Relative Humidity(time_min_rh)
• Temperature, air, at 60-m height, 24-hr minimum(min_temp)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• time
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Barometric Pressure(max_bar_pres)
• lat
• Time of Minimum Wind Speed(time_min_wspd)
• Highest gust within hour is reported(max_wspd)
• Humidity, relative, at 60-m height, 24-hr maximum(max_rh)
• Temperature, air, at 60-m height, 24-hr maximum(max_temp)
• Time of Maximum Wind Speed(time_max_wspd)
• Minimum Snow Depth(min_snow_depth)
• Pressure, vapor, at 60-m height, 24-hr maximum(max_vap_pres)
• Time of Maximum Temperature(time_max_temp)
• Humidity, relative, at 60-m height, 24-hr minimum(min_rh)
• lon
• alt
• Time of Maximum Snow Depth(time_max_snow)

• lon
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• time_offset
• base_time
• Temperature, air(temp)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Unit Vector Wind Direction(wdir)
• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)
• Mean Wind Speed(wspd)
• lat
• Humidity, relative(rh)
• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Precipitation, total(precip)
• alt

• Humidity, relative(rh)
• time_offset
• Humidity, relative, 30-min intervals, standard deviation(sd_rh)
• Temperature, air(temp)
• base_time
• sd_bar_pres
• Precipitation, total(precip)
• Snow, depth, 30-min intervals(snow)
• lat
• Temperature, air, 30-min intervals, standard deviation(sd_temp)
• Mean Wind Speed(wspd)
• sd_vap_pres
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• vbat
• Wind speed, 30-min intervals, standard deviation(sd_wspd)
• snow_sen
• Wind direction, 30-min intervals, standard deviation(sd_deg)
• lon
• alt
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• Unit Vector Wind Direction(wdir)
• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)