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

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

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Standard Deviation of Wind Speed(sd_wspd)

• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)

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)(wspd_va)
• Mean Wind Speed(wspd)
• Standard Deviation of Wind Speed(sd_wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)

• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Wind Speed(sd_wspd)
• Mean Wind Speed(wspd)

• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)

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.

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Standard Deviation of Wind Speed(sd_wspd)

• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(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.

• Time of Minimum Wind Speed(time_min_wspd)
• Minimum of Wind speed(min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• maximum wind speed (gusts)(max_wspd)

• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)

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.

• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)

• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)

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.

• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Wind Speed(sd_wspd)

• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)

SGP/SMOS/E13 - E13 BAROMETRIC PRESSURE VALUES INCORRECT

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

• Standard Deviation of Barometric Pressure(sd_bar_pres)
• barometric pressure(bar_pres)

• barometric pressure(bar_pres)

• barometric pressure(bar_pres)
• Standard Deviation of Barometric Pressure(sd_bar_pres)

• barometric pressure(bar_pres)

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.

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(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.

• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)

• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)

• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Wind Speed(sd_wspd)
• Mean Wind Speed(wspd)

• Time of Minimum Wind Speed(time_min_wspd)
• maximum wind speed (gusts)(max_wspd)
• Time of Maximum Wind Speed(time_max_wspd)
• Minimum of Wind speed(min_wspd)

• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)

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.

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)

• Maximum Relative Humidity(max_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Minimum Relative Humidity(min_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Minimum Vapor Pressure(min_vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_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.

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

• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Wind Speed(sd_wspd)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• barometric pressure(bar_pres)
• Standard Deviation of wind direction(sd_deg)
• Beam 0 Temperature(temp)

• barometric pressure(bar_pres)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• Mean Wind Speed(wspd)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Mean Wind Speed(wspd)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• barometric pressure(bar_pres)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)

• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)
• barometric pressure(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.

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• barometric pressure(bar_pres)
• Standard Deviation of wind direction(sd_deg)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Wind Speed(sd_wspd)
• Unit Vector Wind Direction(wdir)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Mean Wind Speed(wspd)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Wind Speed (vector averaged)(wspd_va)

• Wind Speed (vector averaged)(wspd_va)
• Relative humidity inside the instrument enclosure(rh)
• Mean Wind Speed(wspd)
• Standard Deviation of wind direction(sd_deg)
• Beam 0 Temperature(temp)
• Unit Vector Wind Direction(wdir)
• barometric pressure(bar_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• Mean Wind Speed(wspd)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Standard Deviation of Wind Speed(sd_wspd)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Relative Humidity(sd_rh)
• barometric pressure(bar_pres)
• Beam 0 Temperature(temp)

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

• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• barometric pressure(bar_pres)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

SGP/SMOS/E13 - Wind Data Suspect

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

• maximum wind speed (gusts)(max_wspd)
• Time of Minimum Wind Speed(time_min_wspd)
• Minimum of Wind speed(min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)

• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Wind Speed(sd_wspd)
• Standard Deviation of wind direction(sd_deg)
• Mean Wind Speed(wspd)

• Mean Wind Speed(wspd)
• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(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 Maximum Relative Humidity(time_max_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Relative Humidity(max_rh)
• Time of Minimum Relative Humidity(time_min_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Minimum Vapor Pressure(min_vap_pres)

• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

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)

• barometric pressure(bar_pres)
• Standard Deviation of Barometric Pressure(sd_bar_pres)

• barometric pressure(bar_pres)

SGP/SMOS/E13 -Reprocess:  Wind Speed Values Excessively High

The slope value to convert the rotation of the propeller from engineering units to 
meters/second was incorrectly given as .098 when it should have been .0049.  Conversion was 
converting hertz to meters/second when it should have been converting rpm's to meters/second.

• maximum wind speed (gusts)(max_wspd)
• Minimum of Wind speed(min_wspd)

• Mean Wind Speed(wspd)

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 Maximum Relative Humidity(time_max_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Maximum Relative Humidity(max_rh)
• Time of Minimum Relative Humidity(time_min_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Minimum Vapor Pressure(min_vap_pres)

• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

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.

• maximum wind speed (gusts)(max_wspd)
• Time of Minimum Wind Speed(time_min_wspd)
• Minimum of Wind speed(min_wspd)
• Time of Maximum Wind Speed(time_max_wspd)

• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Wind Speed(sd_wspd)
• Standard Deviation of wind direction(sd_deg)
• Mean Wind Speed(wspd)

• Mean Wind Speed(wspd)
• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(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.

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

• Hourly precipitation(precip)

SGP/SMOS/E13 - Missing Data

Data are missing and unrecoverable

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• base time(base_time)
• lon(lon)
• Mean Wind Speed(wspd)
• Standard Deviation of Air Temperature(sd_temp)
• Batter Voltage(vbat)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• Standard Deviation of wind direction(sd_deg)
• Snow Depth Sensor(snow_sen)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Snow Depth(snow)
• Standard Deviation of Wind Speed(sd_wspd)
• Hourly precipitation(precip)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Relative Humidity(sd_rh)
• barometric pressure(bar_pres)
• Dummy altitude for Zeb(alt)
• Beam 0 Temperature(temp)

• lat(lat)
• Time of Maximum Snow Depth(time_max_snow)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Time of Minimum Wind Speed(time_min_wspd)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Temperature(min_temp)
• Maximum Snow Depth(max_snow)
• Minimum Relative Humidity(min_rh)
• Minimum of Wind speed(min_wspd)
• lon(lon)
• Time of Minimum Relative Humidity(time_min_rh)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Maximum Relative Humidity(max_rh)
• Maximum Temperature(max_temp)
• Time of Maximum Temperature(time_max_temp)
• base time(base_time)
• Minimum Barometric Pressure(min_bar_pres)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Maximum Wind Speed(time_max_wspd)
• Maximum Barometric Pressure(max_bar_pres)
• Minimum Snow Depth(min_snow_depth)
• Time of Minimum Temperature(time_min_temp)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Dummy altitude for Zeb(alt)
• maximum wind speed (gusts)(max_wspd)
• Time of Maximum Relative Humidity(time_max_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Time offset of tweaks from base_time(time_offset)

• lon(lon)
• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• base time(base_time)
• Mean Wind Speed(wspd)
• barometric pressure(bar_pres)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• Dummy altitude for Zeb(alt)
• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• Hourly precipitation(precip)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

SGP/SMOS/E13 - Missing Data

Data are missing and unrecoverable

• Time of Maximum Vapor Pressure(time_max_vap_pres)
• base time(base_time)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• lat(lat)
• time(time)
• Time offset of tweaks from base_time(time_offset)
• Minimum of Wind speed(min_wspd)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Minimum Temperature(min_temp)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Barometric Pressure(min_bar_pres)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Snow Depth(time_min_snow)
• Time of Maximum Temperature(time_max_temp)
• Time of Maximum Relative Humidity(time_max_rh)
• lon(lon)
• Time of Maximum Wind Speed(time_max_wspd)
• Minimum Snow Depth(min_snow_depth)
• Maximum Snow Depth(max_snow)
• maximum wind speed (gusts)(max_wspd)
• Maximum Relative Humidity(max_rh)
• Time of Minimum Temperature(time_min_temp)
• Time of Maximum Snow Depth(time_max_snow)
• Time of Minimum Wind Speed(time_min_wspd)
• Minimum Relative Humidity(min_rh)
• Dummy altitude for Zeb(alt)
• Maximum Temperature(max_temp)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Barometric Pressure(max_bar_pres)
• Time of Minimum Barometric Pressure(time_min_bar_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• base time(base_time)
• lon(lon)
• Mean Wind Speed(wspd)
• Standard Deviation of Air Temperature(sd_temp)
• Batter Voltage(vbat)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• Standard Deviation of wind direction(sd_deg)
• Snow Depth Sensor(snow_sen)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Snow Depth(snow)
• Standard Deviation of Wind Speed(sd_wspd)
• Hourly precipitation(precip)
• Unit Vector Wind Direction(wdir)
• Standard Deviation of Relative Humidity(sd_rh)
• barometric pressure(bar_pres)
• Dummy altitude for Zeb(alt)
• Beam 0 Temperature(temp)

• lon(lon)
• Standard Deviation of wind direction(sd_deg)
• Wind Speed (vector averaged)(wspd_va)
• base time(base_time)
• Mean Wind Speed(wspd)
• barometric pressure(bar_pres)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• Dummy altitude for Zeb(alt)
• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• Hourly precipitation(precip)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

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.

• Hourly precipitation(precip)

• Hourly precipitation(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 Maximum Temperature(time_max_temp)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Minimum Temperature(min_temp)
• Maximum Relative Humidity(max_rh)
• Time of Minimum Temperature(time_min_temp)
• Time of Minimum Relative Humidity(time_min_rh)
• Maximum Temperature(max_temp)
• Maximum Vapor Pressure(max_vap_pres)
• Minimum Vapor Pressure(min_vap_pres)

• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Relative Humidity(sd_rh)
• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)
• Beam 0 Temperature(temp)
• Standard Deviation of wind direction(sd_deg)

• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(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.

• Standard Deviation of Relative Humidity(sd_rh)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

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.

• Standard Deviation of Relative Humidity(sd_rh)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

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

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

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

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

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)

SGP/SMOS/E13 - Bad humidity data

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

SGP/SMOS/E13 - Bad humidity data

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

• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

SGP/SMOS/E13 - Bad humidity data

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

SGP/SMOS/E13 - Bad humidity data

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

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

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

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)

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

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

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)

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

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

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(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

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(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.

• Hourly precipitation(precip)

• Hourly precipitation(precip)

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

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Dummy altitude for Zeb(alt)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Snow Depth(snow)
• Hourly precipitation(precip)
• Mean Wind Speed(wspd)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• barometric pressure(bar_pres)
• Time offset of tweaks from base_time(time_offset)
• Standard Deviation of wind direction(sd_deg)
• Batter Voltage(vbat)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)
• lon(lon)
• lat(lat)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• base time(base_time)

• Hourly precipitation(precip)
• Beam 0 Temperature(temp)
• lat(lat)
• Relative humidity inside the instrument enclosure(rh)
• base time(base_time)
• Unit Vector Wind Direction(wdir)
• Dummy altitude for Zeb(alt)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• Wind Speed (vector averaged)(wspd_va)
• barometric pressure(bar_pres)

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.

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(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.

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

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.

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

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

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

SGP/SMOS/E13 - Tower lowered for maintenance

Tower lowered for SIROS maintenance.

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Dummy altitude for Zeb(alt)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Snow Depth(snow)
• Hourly precipitation(precip)
• Mean Wind Speed(wspd)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• barometric pressure(bar_pres)
• Time offset of tweaks from base_time(time_offset)
• Standard Deviation of wind direction(sd_deg)
• Batter Voltage(vbat)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)
• lon(lon)
• lat(lat)
• Standard Deviation of Wind Speed(sd_wspd)
• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)
• base time(base_time)

• Hourly precipitation(precip)
• Beam 0 Temperature(temp)
• lat(lat)
• Relative humidity inside the instrument enclosure(rh)
• base time(base_time)
• Unit Vector Wind Direction(wdir)
• Dummy altitude for Zeb(alt)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• Wind Speed (vector averaged)(wspd_va)
• barometric pressure(bar_pres)

SGP/SMOS/E13 - Incorrect humidity data

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

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)

SGP/SMOS/E13 - Incorrect humidity data

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

SGP/SMOS/E13 - Incorrect humidity data

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

SGP/SMOS/E13 - Incorrect humidity data

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

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)

SGP/SMOS/E13 - Incorrect humidity data

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

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)

SGP/SMOS/E13 - Incorrect humidity data

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

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(rh)

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.

• Time of Minimum Wind Speed(time_min_wspd)
• Maximum Barometric Pressure(max_bar_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Time of Maximum Temperature(time_max_temp)
• Minimum Snow Depth(min_snow_depth)
• lat(lat)
• Maximum Temperature(max_temp)
• Maximum Relative Humidity(max_rh)
• Dummy altitude for Zeb(alt)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Minimum of Wind speed(min_wspd)
• Minimum Barometric Pressure(min_bar_pres)
• maximum wind speed (gusts)(max_wspd)
• Minimum Temperature(min_temp)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Vapor Pressure(min_vap_pres)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Time offset of tweaks from base_time(time_offset)
• Maximum Snow Depth(max_snow)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Maximum Snow Depth(time_max_snow)
• Time of Minimum Temperature(time_min_temp)
• base time(base_time)
• Time of Minimum Relative Humidity(time_min_rh)
• Time of Maximum Wind Speed(time_max_wspd)
• lon(lon)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Dummy altitude for Zeb(alt)
• Hourly precipitation(precip)
• Snow Depth(snow)
• barometric pressure(bar_pres)
• Standard Deviation of wind direction(sd_deg)
• Batter Voltage(vbat)
• Standard Deviation of Air Temperature(sd_temp)
• lon(lon)
• Standard Deviation of Wind Speed(sd_wspd)
• Unit Vector Wind Direction(wdir)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Mean Wind Speed(wspd)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Time offset of tweaks from base_time(time_offset)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• lat(lat)
• Wind Speed (vector averaged)(wspd_va)
• base time(base_time)

• Hourly precipitation(precip)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• base time(base_time)
• Dummy altitude for Zeb(alt)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)
• barometric pressure(bar_pres)
• Beam 0 Temperature(temp)
• lat(lat)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• Wind Speed (vector averaged)(wspd_va)

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.

• Standard Deviation of Relative Humidity(sd_rh)
• Standard Deviation of wind direction(sd_deg)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)
• Standard Deviation of Wind Speed(sd_wspd)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Wind Speed (vector averaged)(wspd_va)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)

• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Mean Wind Speed(wspd)
• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)
• Standard Deviation of wind direction(sd_deg)

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.

• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)

• Vapor Pressure (kiloPascals)(vap_pres)
• Relative humidity inside the instrument enclosure(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.

• Minimum Temperature(min_temp)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Maximum Temperature(time_max_temp)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Temperature(time_min_temp)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Temperature(max_temp)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(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.

• Standard Deviation of Relative Humidity(sd_rh)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)
• Vapor Pressure (kiloPascals)(vap_pres)

• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

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.

• Minimum Temperature(min_temp)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Maximum Temperature(time_max_temp)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Temperature(time_min_temp)
• Time of Minimum Relative Humidity(time_min_rh)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Temperature(max_temp)
• Maximum Relative Humidity(max_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)

• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(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.

• Time of Minimum Wind Speed(time_min_wspd)
• Maximum Barometric Pressure(max_bar_pres)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Minimum Barometric Pressure(time_min_bar_pres)
• Time of Maximum Temperature(time_max_temp)
• Minimum Snow Depth(min_snow_depth)
• lat(lat)
• Maximum Temperature(max_temp)
• Maximum Relative Humidity(max_rh)
• Dummy altitude for Zeb(alt)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Minimum of Wind speed(min_wspd)
• Minimum Barometric Pressure(min_bar_pres)
• maximum wind speed (gusts)(max_wspd)
• Minimum Temperature(min_temp)
• Time of Minimum Snow Depth(time_min_snow)
• Minimum Vapor Pressure(min_vap_pres)
• Time of Maximum Barometric Pressure(time_max_bar_pres)
• Time offset of tweaks from base_time(time_offset)
• Maximum Snow Depth(max_snow)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Maximum Snow Depth(time_max_snow)
• Time of Minimum Temperature(time_min_temp)
• base time(base_time)
• Time of Minimum Relative Humidity(time_min_rh)
• Time of Maximum Wind Speed(time_max_wspd)
• lon(lon)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Snow Depth Sensor(snow_sen)
• Dummy altitude for Zeb(alt)
• Hourly precipitation(precip)
• Snow Depth(snow)
• barometric pressure(bar_pres)
• Standard Deviation of wind direction(sd_deg)
• Batter Voltage(vbat)
• Standard Deviation of Air Temperature(sd_temp)
• lon(lon)
• Standard Deviation of Wind Speed(sd_wspd)
• Unit Vector Wind Direction(wdir)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Mean Wind Speed(wspd)
• Standard Deviation of Barometric Pressure(sd_bar_pres)
• Time offset of tweaks from base_time(time_offset)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• lat(lat)
• Wind Speed (vector averaged)(wspd_va)
• base time(base_time)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• Hourly precipitation(precip)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• base time(base_time)
• Dummy altitude for Zeb(alt)
• Standard Deviation of wind direction(sd_deg)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)
• barometric pressure(bar_pres)
• Beam 0 Temperature(temp)
• lat(lat)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• Wind Speed (vector averaged)(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 temperature and humidity data are questionable
during this period.

• Minimum Temperature(min_temp)
• Time of Maximum Relative Humidity(time_max_rh)
• Time of Maximum Temperature(time_max_temp)
• Maximum Temperature(max_temp)
• Minimum Vapor Pressure(min_vap_pres)
• Maximum Relative Humidity(max_rh)
• Minimum Relative Humidity(min_rh)
• Time of Minimum Vapor Pressure(time_min_vap_pres)
• Time of Maximum Vapor Pressure(time_max_vap_pres)
• Maximum Vapor Pressure(max_vap_pres)
• Time of Minimum Temperature(time_min_temp)
• Time of Minimum Relative Humidity(time_min_rh)

• Standard Deviation of Relative Humidity(sd_rh)
• Relative humidity inside the instrument enclosure(rh)
• Vapor Pressure (kiloPascals)(vap_pres)
• Beam 0 Temperature(temp)
• Standard Deviation of Vapor Pressure(sd_vap_pres)
• Standard Deviation of Air Temperature(sd_temp)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• Beam 0 Temperature(temp)
• Relative humidity inside the instrument enclosure(rh)
• Unit Vector Wind Direction(wdir)
• Vapor Pressure (kiloPascals)(vap_pres)
• Mean Wind Speed(wspd)
• Wind Speed (vector averaged)(wspd_va)