SGP/SMOS/E6 - RH Sensor failure

The RH readings on the SMOS dropped to zero or became very noisy during rain or moist 
conditions.  The sensor was replaced.

• Humidity, relative, 30-min intervals, standard deviation(sd_rh)
• sd_vap_pres
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• Humidity, relative(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)
• Pressure, vapor, at 60-m height, 24-hr minimum(min_vap_pres)
• Pressure, vapor, at 60-m height, 24-hr maximum(max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Humidity, relative, at 60-m height, 24-hr maximum(max_rh)

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

SGP/SMOS/E6 - SMOS Wind direction low

The wind direction reported by the SMOS went from being 7 degrees too low at the beginning 
of 2005 (the 7 degrees is a result of misalignment of the SMOS tower by 7 degrees) to 
15-20 degrees too small by November 2005.

The wind sensor was replaced, bringing the wind direction back to being 7
degrees too small.

• Unit Vector Wind Direction(wdir)

• Unit Vector Wind Direction(wdir)

SGP/SMOS/E3 - Incorrect Offset for Wind Directon

An incorrect offset of 7 degrees was subtracted from the wind direction to correct for 
misalignment of the towers to true north. The wind direction data may be corrected but the 
vector averaged wind speed cannot. Subsequent audits have highlighted problems with past 
measurements of tower alignments.  All corrections to wind direction are being removed and 
Users are directed to view the Instrument Handbook for a table listing all tower 
alignment deviations from true north.  Users can adjust the data at their discretion.

• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Unit Vector Wind Direction(wdir)

• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E4 - Incorrect Offset for Wind Directon

An incorrect offset of 7 degrees was subtracted from the wind direction to correct for 
misalignment of the towers to true north. The wind direction data may be corrected but the 
vector averaged wind speed cannot. Subsequent audits have highlighted problems with past 
measurements of tower alignments.  All corrections to wind direction are being removed and 
Users are directed to view the Instrument Handbook for a table listing all tower 
alignment deviations from true north.  Users can adjust the data at their discretion.

• Unit Vector Wind Direction(wdir)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E6 - Incorrect Offset for Wind Directon

An incorrect offset of 7 degrees was subtracted from the wind direction to correct for 
misalignment of the towers to true north. The wind direction data may be corrected but the 
vector averaged wind speed cannot. Subsequent audits have highlighted problems with past 
measurements of tower alignments.  All corrections to wind direction are being removed and 
Users are directed to view the Instrument Handbook for a table listing all tower 
alignment deviations from true north.  Users can adjust the data at their discretion.

• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Unit Vector Wind Direction(wdir)

• Unit Vector Wind Direction(wdir)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

SGP/SMOS/E7 - Incorrect Offset for Wind Directon

An incorrect offset of 6 degrees was subtracted from the wind direction to correct for 
misalignment of the towers to true north. The wind direction data may be corrected but the 
vector averaged wind speed cannot. Subsequent audits have highlighted problems with past 
measurements of tower alignments.  All corrections to wind direction are being removed and 
Users are directed to view the Instrument Handbook for a table listing all tower 
alignment deviations from true north.  Users can adjust the data at their discretion.

• Unit Vector Wind Direction(wdir)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E27 - Incorrect Offset for Wind Directon

An incorrect offset of 7 degrees was subtracted from the wind direction to correct for 
misalignment of the towers to true north. The wind direction data may be corrected but the 
vector averaged wind speed cannot. Subsequent audits have highlighted problems with past 
measurements of tower alignments.  All corrections to wind direction are being removed and 
Users are directed to view the Instrument Handbook for a table listing all tower 
alignment deviations from true north.  Users can adjust the data at their discretion.

• Unit Vector Wind Direction(wdir)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E7 - Missing data

Data are missing and unrecoverable

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

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

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

SGP/SMOS/E9 - Missing Data

Data are missing and unrecoverable

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

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

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