SGP/SMOS/E13 - E13 SMOS Wind speed data incorrect

Wind speed sensor had ice accumulation, causing data to be incorrect.

• Mean Wind Speed(wspd)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

• Wind speed, 30-min intervals, standard deviation(sd_wspd)
• Mean Wind Speed(wspd)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

SGP/SMOS/E13 - E13 SMOS SNOW DEPTH DATA INCORRECT

Data incorrect due to new program reading sensor input when no sensor installed.  Values 
read near 1539 mm.

• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Time of Maximum Snow Depth(time_max_snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

SGP/SMOS/E13 - E13 SNOW DEPTH DATA QUESTIONABLE

Snow depth readings intermittently reported outside the manufacturer's tolerance of +/- 
25mm.

• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Time of Maximum Snow Depth(time_max_snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

SGP/SMOS/E13 - E13 SMOS SNOW DATA INCORRECT

Due to a programming error all snow depth data were reported as 0.  In effect, no snow 
depth data were collected.

• Time of Maximum Snow Depth(time_max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

SGP/SMOS/E13 - E13 SMOS SNOW DATA INCORRECT

Due to a programming error all snow depth data were reported as 0.  In effect, no snow 
depth data were collected.

• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Time of Maximum Snow Depth(time_max_snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

SGP/SMOS/E13 - E13 SMOS WIND SPEED DATA INCORRECT

Wind speed data incorrect due to ice accumulation on the sensor.  Ice accumulated during 
an ice storm.

• 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)
• Mean Wind Speed(wspd)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

• Wind speed, 30-min intervals, standard deviation(sd_wspd)
• Mean Wind Speed(wspd)
• 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)
• Mean Wind Speed(wspd)

SGP/SMOS/E13 - Reprocess: Wind speed calibrations

EDITOR'S NOTE:  The earliest portion of the period of time covered
by this DQR occurred prior to the begin date of regular ARM data.
Those data are not readily available from the ARM Archive but are
available by special request.  The actual period of time covered
by this DQR is 930329.0000-930812.1430.


Practically all of the information in this DQR is derived from
P930723.1 and C930830.1, both of which were submitted by Dick Hart. 

The calibrations initially used for wind speeds on SMOS systems at 
Coldwater (E8), Ashton (E9), the central faciality (E13), Ringwood (E15),
and Meeker (E20) were originally "generic"values, but analysis of the 
N.I.S.T traceable calibration data reveals that use of these "generic" 
calibrations produces data with insufficient accuracy. The calibrations 
for the wind speed sensor associated with the instrument must be used 
in the datalogger program in order to obtain data with a 1% uncertainty.
For the worst case, one wind speed sensor underestimates the wind speed 
by 1.1 m/s at 30 m/s when the "generic" calibration is used.  This is 
on top of the 1% calibration uncertainty.  

No unreported data loss occurred as a result of this calibration question, 
but users of the data should adjust the wind speed values before analysis 
involving these wind speed values.

• Mean Wind Speed(wspd)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

• Wind speed, 30-min intervals, standard deviation(sd_wspd)
• Mean Wind Speed(wspd)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

SGP/SMOS/E13 - E13 SMOS lowered to surface to install counterweights

The E13 SMOS was lowered to the surface on 24 SEP 1999 between 1300 and 1320 GMT 
while counterweights were installed.  All wind speed and direction data are incorrect 
during this period.

• Raw data stream - documentation not supported

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

• Raw data stream - documentation not supported

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

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

SGP/SMOS/E13 - Tower lowered for work on instrumentation

Due to tower being lowered to work on intrumentation between 
1530 and 1630 GMT on 18 AUG 94, all wind data are incorrect 
during this period.

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

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

SGP/SMOS/E13 - Tower lowered for work on instrumentation

Due to tower being lowered to work on instrumentation, 
all sgp1smosE13 and sgp30smosE13 wind data taken between 
1420 - 1440 GMT on 19 OCT 94 are incorrect.

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

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

SGP/SMOS/E13 - E13 BAROMETRIC PRESSURE VALUES INCORRECT

Barometric pressure values artificially low due to program and power restoration after a 
prolonged power outage.

• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)

• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)
• sd_bar_pres

• sd_bar_pres
• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)

• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)

SGP/SMOS/E13 - SNOW DEPTH DATA INCORRECT

Data was reported as outside of manufacturer's tolerance.

• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Time of Maximum Snow Depth(time_max_snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

SGP/SMOS/E13 - SNOW DEPTH DATA INCORRECT

Snow depth sensor was removed for the season.  Temperatures fell to below 10 deg C causing 
ingest program to accumulate erroneous readings.

• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Time of Maximum Snow Depth(time_max_snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

SGP/SMOS/E13 - Snow depth sensor removed; data reported as missin

The snow depth sensor was removed from service.  The program was changed so that -9999 is 
entered into the datastream.

• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Time of Maximum Snow Depth(time_max_snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

SGP/SMOS/E13 - Erroneous Tips in Precip Data

Erroneous tips were being generated from an unknown source.  Reed switch was finally 
replaced and the problem did not reappear.

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

SGP/SMOS/E13 - WIND SPEED VALUES LOW DUE TO ICING

The wind speed values were artificailly low due to icing on the propellor vanes.  Wind 
direction values were not affected.

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

• 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)
• Mean Wind Speed(wspd)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)

• Wind speed, 30-min intervals, standard deviation(sd_wspd)
• Mean Wind Speed(wspd)
• 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)
• Mean Wind Speed(wspd)

SGP/SMOS/E13 - Sensor failure

Beginning around 1415 UTC on 08/30, the RH readings for
this instrument were frequently around 0 (sometimes
there are erratic spikes upward from 0 for periods of
time). Rainfall appears to have been the cause of the
erroneous readings, as the instrument appeared to fail
in and around the time of heavy rains.

A maintenance visit occurred on 09/04, afterwards data
returned to normal values.

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

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

• Humidity, relative(rh)
• Humidity, relative, 30-min intervals, standard deviation(sd_rh)

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

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

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 - 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.

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

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

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

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.

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

• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Temperature, air(temp)
• Unit Vector Wind Direction(wdir)
• 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)

• Humidity, relative(rh)
• Humidity, relative, 30-min intervals, standard deviation(sd_rh)
• Temperature, air(temp)
• sd_bar_pres
• 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)
• 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)

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

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

SGP/SMOS/E13 - Wind Data Suspect

Wind speed and direction data suspect during time period due to icing.

• 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 - T/RH sensor failure

The T/RH sensor began to fail at high RH% values.  Since this site has an aspirated 
radiation shield, values in excess of the 104% manufacturer limit are not expected to occur due 
to rain or condensation.

• 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 - Reprocess: Barometer data a factor of 10 too high.

The program was modified and an incorrect multiplier was used so that the barometer data 
was reported in hPa instead of kPa.

• Minimum Barometric Pressure(min_bar_pres)
• Maximum Barometric Pressure(max_bar_pres)

• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)

• Pressure, atmospheric, at 1-m height, 30-min intervals(bar_pres)
• sd_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 - Snowfall caused delayed count of precip

A snow/ice storm moved through the SGP region on 01/31/08 bringing below-freezing 
temperatures, affecting the precip field.  Data is suspect during the date/time range specified 
due to melting ice after temperatures warmed above freezing.

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

• Precipitation, total(precip)

SGP/SMOS/E13 - Missing Data

Data are missing and unrecoverable

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

• lon
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• time_offset
• base_time
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Temperature, air(temp)
• 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)

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)

SGP/SMOS/E13 - Rain Gauge Inoperative

The rain gauge measured values did not compare well with the disdrometer.  Subsequent 
testing found the gauge to be incorrect.

• Precipitation, total(precip)

• Precipitation, total(precip)

SGP/SMOS/E13 - SMOS T/RH probe solar shield missing

The solar shield protecting the T/RH probe from direct sunlight and the elements became 
unscrewed and fell off.  The probe was affected by sunlight and did not have a consistent 
aspiration during this time.

• 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 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)
• Temperature, air, at 60-m height, 24-hr maximum(max_temp)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Temperature(time_min_temp)
• Pressure, vapor, at 60-m height, 24-hr maximum(max_vap_pres)

• Humidity, relative(rh)
• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Temperature, air(temp)
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)

• Humidity, relative(rh)
• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Temperature, air, 30-min intervals, standard deviation(sd_temp)
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• Humidity, relative, 30-min intervals, standard deviation(sd_rh)
• Temperature, air(temp)

SGP/SMOS/E13 - Tower lowered for work on instrumentation

Due to tower being lowered to work on instrumentation between 1530 and 1630 GMT on 18 AUG 
94, all temperature and relative humidity data are questionable during this period.

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

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

SGP/SMOS/E13 - Tower lowered for work on instrumentation

Due to tower being lowered to work on instrumentation, 
all sgp1smosE13 and sgp30smosE13 temperature and humidity 
data taken between 1420-1440 GMT on 19 OCT 94 are questionable.

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

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

SGP/SMOS/E13 - Relative Humidity and Vapor Pressure data bad

All Relative Humidity and Vapor Pressure data are incorrect.  Sensor probably was wet.

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

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

SGP/SMOS/E13 - Relative Humidity and Vapor Pressure data bad

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

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

SGP/SMOS/E13 - Bad humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

SGP/SMOS/E13 - Bad humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

SGP/SMOS/E13 - Bad humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

SGP/SMOS/E13 - Bad humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

SGP/SMOS/E13 - Humidity and vapor pressure data bad

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

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

SGP/SMOS/E13 - Humidity and vapor pressure data bad

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

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

SGP/SMOS/E13 - Humidity and vapor pressure data bad

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

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

SGP/SMOS/E13 - Humidity and vapor pressure data bad

All Relative Humidity and Vapor Pressure data incorrect.  Sensor was probably wet and
then failed.  Sensor replaced and returned to service at 2140 GMT on 30 JUN 95

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

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

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

SGP/SMOS/E13 - Rain gauge and CR10 input wiring damaged by lightning

Rain gauge and CR10 input wiring damaged by lightning.  Full repairs
completed on 31 JUL 95.

• Precipitation, total(precip)

• Precipitation, total(precip)

SGP/SMOS/E13 - All data bad - internal battery voltage low

All data incorrect.  Internal battery voltage low, apparently not charging.

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

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

SGP/SMOS/E13 - All RH and vapor pressure data bad

All Relative Humidity and Vapor Pressure data incorrect.  Sensor may have gotten
wet.  Since rain gauge wasn't working, it cannot be verified.

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

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

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

SGP/SMOS/E13 - All RH and vapor pressure data bad

All Relative Humidity and Vapor Pressure data incorrect.  Sensor may have gotten
wet.  Since rain gauge wasn't working, it cannot be verified.

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

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

SGP/SMOS/E13 - All RH data and vapor pressure data bad

All Relative Humidity and Vapor Pressure data incorrect.  Sensor may have gotten
wet.  Since rain gauge wasn't working, it cannot be verified.

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

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

SGP/SMOS/E13 - All RH and vapor pressure data bad

All Relative Humidity and Vapor Pressure data incorrect.  Sensor may have gotten
wet.

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

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

SGP/SMOS/E13 - Tower lowered for maintenance

Tower lowered for SIROS maintenance.

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

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

SGP/SMOS/E13 - Incorrect humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably got wet.

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

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

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

SGP/SMOS/E13 - Incorrect humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Cause unknown.

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

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

SGP/SMOS/E13 - Incorrect humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably got wet.

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

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

SGP/SMOS/E13 - Incorrect humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

SGP/SMOS/E13 - Incorrect humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

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

SGP/SMOS/E13 - Incorrect humidity data

All Relative Humidity and Vapor Pressure data incorrect.  Sensor probably was wet.

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

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

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

SGP/SMOS/E13 - Error in Snow Depth Output

Dick Hart of ANL proposed a change in the frequency of sampling of snow 
depth by the SMOS, to obtain a more accurate measurement.  He modified the 
SMOS CR10 program in December 1995 but did not have the opportunity to ask for 
it to be implemented.  In January, acting in Dick's behalf, I forwarded the 
changes to site operations, along with a Baseline Change Request (BCR).  The 
changes were implemented in the Central Facility (E13) SMOS only on 29 January 
1996 for testing.  Within a few days it was clear that the snow depth 
measurement was not being made properly.  The common outputs for snowdepth 
were 0.0 or 895.0 (895.0 data is incorrect).  I reviewed the CR10 program and 
found that some further changes were needed.  I then submitted these 
changes to site operations along with another BCR.  The changes were 
implemented in the CF SMOS only on 6 March 1996.  Snowdepth data since that
date has been correct.  The program changes can now be implemented in the 
other SMOS CR10s; the changes will be transparent to the data user.

• Time of Maximum Snow Depth(time_max_snow)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)

• snow_sen
• Snow, depth, 30-min intervals(snow)

SGP/SMOS/E13 - Incorrect data

Two tower legs failed while lowering the tower on 19 DEC 95.  All data
affected.  Temporary repairs made and tower raised on 20 DEC 95.

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

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

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

SGP/SMOS/E13 - Tower down for maintenance

SMOS E13 tower was down for maintenance on 13 APR 96 between 1530
and 1605 GMT.  All wind, temperature, and humidity data taken during 
this period are incorrect. Rainfall and Barometric Pressure data are OK.

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

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

SGP/SMOS/E13 - Questionable data

The values of relative humidity reported by the SMOS at E13 between 
18 NOV 96 and 1930 GMT on 30 JAN 97 are too high.  Saturation values
of 104% to 105% have been reported during this period.  A 6-month 
Verification Check was made on 18 NOV 96 and the SMOS probe did not
agree with the reference at that time.  The SMOS probe was finally 
replaced on 30 JAN 97.  Data reported since that time appears reasonable.

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

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

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

SGP/SMOS/E13 - T/RH Probe Malfunction

When the SMOS E13 T/RH probe was replaced on 30 JAN 97, it
      was not adequately sealed to prevent rain infiltration.  During a
      rain, which fell between 20 FEB 97 at 0730 GMT and 22 FEB 97 at 1230
      GMT, the RH probe malfunctioned apparently due to becoming wet.

• Time of Maximum Relative Humidity(time_max_rh)
• Humidity, relative, at 60-m height, 24-hr maximum(max_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Temperature, air, at 60-m height, 24-hr maximum(max_temp)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Humidity, relative, at 60-m height, 24-hr minimum(min_rh)
• Time of Relative Humidity(time_min_rh)
• Time of Minimum Temperature(time_min_temp)
• 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 Temperature(time_max_temp)
• Temperature, air, at 60-m height, 24-hr minimum(min_temp)

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

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

SGP/SMOS/E13 - T/RH Probe Malfunction

When the SMOS E13 T/RH probe was replaced on 30 JAN 97, it
      was not adequately sealed to prevent rain infiltration.  During a
      rain, which fell on 26 FEB 97 between 1530 and 2130 GMT, the RH probe 
      malfunctioned apparently due to becoming wet.  Bad RH data were
      reported between 1530-1700 GMT and again between 2000-2130 GMT.

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

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

SGP/SMOS/E13 - T/RH Probe Malfunction

When the SMOS E13 T/RH probe was replaced on 30 JAN 97, it
      was not adequately sealed to prevent rain infiltration.  During a
      rain, which fell on 27 FEB 97 between 0230 and 1630 GMT, the RH probe 
      malfunctioned apparently due to becoming wet.

• Time of Maximum Relative Humidity(time_max_rh)
• Humidity, relative, at 60-m height, 24-hr maximum(max_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Temperature, air, at 60-m height, 24-hr maximum(max_temp)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Humidity, relative, at 60-m height, 24-hr minimum(min_rh)
• Time of Relative Humidity(time_min_rh)
• Time of Minimum Temperature(time_min_temp)
• 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 Temperature(time_max_temp)
• Temperature, air, at 60-m height, 24-hr minimum(min_temp)

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

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

SGP/SMOS/E13 - Questionable E13 SMOS humidity data APR - NOV 95

When the E13 SMOS naturally aspirated radiation shield was replaced with a fan aspirated 
radiation shield on 14 APR 95 at 2030 GMT, the new shield was not adequately sealed to 
prevent penetration of water, whether from rain or from dew, from entering the radiation 
shield and causing incorrect humidity data.

After numerous attempts, the radiation shield was successfully sealed early in NOV 95.
Separate DQR's have been issued for humidity data that was obviously erroneous, but on 
numerous occasions during that period the humidity data has looked suspicious (e.g., see PIF 
P960624.1).

Therefore, all humidity data reported by the E13 SMOS during that period should be 
considered questionable.

• Raw data stream - documentation not supported

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

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

SG/SMOS/E13 - E13 SMOS down for tower replacement

The E13 SMOS was shut down from 14 APR 1999 at 2100 GMT until 3 MAY 1999 at 2055 GMT 
while the tower was replaced.

• Raw data stream - documentation not supported

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

• Raw data stream - documentation not supported

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

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

SGP/SMOS/E13 - E13 SMOS lowered to surface to install counterweights

The E13 SMOS was lowered to the surface on 24 SEP 1999 between 1300 and 1320 GMT 
while counterweights were installed.  All temperature and humidity data are questionable
during this period.

• Raw data stream - documentation not supported

• Time of Maximum Relative Humidity(time_max_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Temperature, air, at 60-m height, 24-hr maximum(max_temp)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Humidity, relative, at 60-m height, 24-hr minimum(min_rh)
• Time of Relative Humidity(time_min_rh)
• Time of Minimum Temperature(time_min_temp)
• Time of Maximum Temperature(time_max_temp)
• Humidity, relative, at 60-m height, 24-hr maximum(max_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)
• Temperature, air, at 60-m height, 24-hr minimum(min_temp)

• Raw data stream - documentation not supported

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

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