SGP/SMOS/E7 - E7 SMOS Wind speed values incorrect

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

• 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)

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

SGP/SMOS/E8 - E8 SMOS Wind speed sensor data incorrect

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

• 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)

SGP/SMOS/E8 - E8 SMOS RH values beyond tolerance

RH% values reading above 103%, which is beyond tolerance.

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

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

• Humidity, relative(rh)

SGP/SMOS/E8 - E8 SMOS RH VALUES OUTSIDE OF TOLERANCE

Rh% values readings falling outside of tolerance on high side

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

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

SGP/SMOS/E8 - E8 WS DATA INCORRECT

WS data artificially low due to ice accumulation on sensor.

• 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)

SGP/SMOS/E8 - E8 SMOS RH DATA VALUES ARTIFICIALLY HIGH

Rh% values approximately 10% at 70% and above.  Sensor drifted out of tolerance.

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

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

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

SGP/SMOS/E8 - Reprocess: Wind speed calibration

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 upon request.  The actual period of time covered by this
DQR is 930403.0000-930811.1530.


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, 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)

SGP/SMOS/E7 - E7 SMOS lowered to surface to install counterweights

The E7 SMOS was lowered to the surface on 8 OCT 1999 between 0740 and 0755 GMT 
while counterweights were installed.  All wind speed and direction data are incorrect 
during this period.

• Raw data stream - documentation not supported

• 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 direction, 30-min intervals, standard deviation(sd_deg)
• Unit Vector Wind Direction(wdir)

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

• 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)

• Raw data stream - documentation not supported

SGP/SMOS/E8 - Incorrect E8 SMOS rain data

The E8 SMOS rain gauge pulse counter was found to be non-operational during the 16 SEP 97 
PM.  It was repaired by replacing the CR10 wiring harness on 29 OCT 97 at 1815 GMT.

• Precipitation, total(precip)

• Raw data stream - documentation not supported

• Precipitation, total(precip)

SGP/SMOS/E8 - E8 SMOS lowered to surface to install counterweights

The E8 SMOS was lowered to the surface on 5 OCT 1999 between 1325 and 1350 GMT 
while counterweights were installed.  All wind speed and direction data are incorrect 
during this period.

• 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 speed, 30-min intervals, standard deviation(sd_wspd)

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

SGP/SMOS/E6 - 6-month Calibration Checks

During the time periods specified, the SMOS.E6 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.

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

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

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

SGP/SMOS/E7 - 6-month Calibration Checks

During the time periods specified, the SMOS.E7 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, atmospheric, at 1-m height, 30-min intervals(bar_pres)
• sd_vap_pres
• Humidity, relative, 30-min intervals, standard deviation(sd_rh)
• Mean Wind Speed(wspd)
• Temperature, air, 30-min intervals, standard deviation(sd_temp)
• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Wind speed, 30-min intervals, standard deviation(sd_wspd)
• Temperature, air(temp)
• Wind speed, vector-averaged, at 10-m height, 30-min intervals(wspd_va)
• Humidity, relative(rh)
• sd_bar_pres
• Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
• Unit Vector Wind Direction(wdir)

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

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

SGP/SMOS/E8 - 6-month Calibration Checks

During the time periods specified, the SMOS.E8 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.

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

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

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

SGP/SMOS/E7 - Reprocess: Wind direction offset

When the SGP.E7 SMOS tower was installed it was not aligned
properly resulting in a 6 degree offset.  On 3/08/05, the
datalogger program was modified to correct for this offset.

• Unit Vector Wind Direction(wdir)

• Unit Vector Wind Direction(wdir)

SGP/SMOS/E7 - RH values incorrect

RH values were reported at near 0%.  All derived values also affected.

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

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

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

SGP/SMOS/E7 - Reprocess: Incorrect Wind Speed data from SMOS E7

Editor's Note:  A portion of the period of time to which this DQR applies is prior to the 
begin date of regular ARM data collection.  The actual begin date of the problem 
described in this DQR is 950224.0400.

Incorrect Wind Speed calibration factor used at installation.  The correct 
calibration factor was loaded into the data logger on 20 APR 95 at 2014 GMT.

• 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)

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

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

SGP/SMOS/E7 - Questionable Humidity data

Editor's note:  A portion of the period of time to which this DQR 
applies is prior to the begin date of regular ARM data collection.  
The actual begin date of the problem described in this DQR is 950224.0400.

All SMOS E7 humidity data taken during this period are questionable.
The sensor was replaced several times. A "good" sensor was finally 
installed on 17 MAY 95 at 1732 GMT.

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

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

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

SGP/SMOS/E8 - Reprocess: Incorrect wind speed calibration

The wrong data logger program file was loaded into the data logger.
The best guess is that this was done when the system was relocated
on 10 MAY 95.  It was discovered and corrected during the 6 month 
sensor verification.

• 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)

• 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)

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

SGP/SMOS/E7 - Reprocess: Wind direction incorrect

The 10m tower at E7 fell on 20 FEB 97 some time after 2130 GMT.  It was returned to 
service on 13 MAR 97 at 0600 GMT, but the wind monitor was incorrectly installed resulting in 
wind directions being 180 deg out until it was re-oriented on 20 MAR 97 at 1600 GMT.

• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Unit Vector Wind Direction(wdir)

• Wind direction, 30-min intervals, standard deviation(sd_deg)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E7 - Humidity data drifted out of tolerance

The humidity data reported by the Elk Falls (E7) SMOS drifted out of tolerance starting on 
approximately 4 OCT 96.  The RH probe started reporting values exceeding 104% RH.  The 
SMOS underwent a 6-month verification check on 13 NOV 96, but the reference RH sensor was 
not operating properly at the time.  At the mentor's request, the T/RH probe was replaced 
on 4 FEB 97, but the replacement probe was not operating within specifications.  Due to 
lack of calibrated spare probes, the bad replacement T/RH probe was not replaced until 16 
APR 97.

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

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

SGP/SMOS/E8 - Reprocess: Incorrect wind directions from E8 SMOS

When the Wind Monitor was changed at E8 for scheduled PM, the replacement sensor was 
incorrectly wired to the data logger.  It did not effect the wind speed readings, but wind 
directions had E and W reversed.  Thus winds from 15 deg were reported as being from 345 
deg, and vice-versa, and winds from 165 deg were reported as being from 195 degrees, and 
vice-versa.

• Unit Vector Wind Direction(wdir)
• Wind direction, 30-min intervals, standard deviation(sd_deg)

• Unit Vector Wind Direction(wdir)
• Wind direction, 30-min intervals, standard deviation(sd_deg)

SGP/SMOS/E8 - Questionable E8 SMOS rain data

The E8 SMOS rain gauge pulse counter was found to be non-operational during the 16 SEP 97 
PM.  It was repaired by replacing the CR10 wiring harness on 29 OCT 97 at 1815 GMT.

• Precipitation, total(precip)

• Raw data stream - documentation not supported

• Precipitation, total(precip)

SGP/SMOS/E8 - Icing affected E8 SMOS wind speed

Icing conditions at E8 caused the SMOS wind speed data to be questionable
between 1400 and 2130 GMT on 16 MAR 98 and again between 0430 and 1630 GMT
on 17 MAR 98. The data appear to be unaffected between those two periods,
but may also be questionable.

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

• 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

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

SGP/SMOS/E8 - E8 SMOS lowered to surface to install couterweights

The E8 SMOS was lowered to the surface on 5 OCT 1999 between 1325 and 1350 GMT 
while counterweights were installed.  All temperature and humidity data are questionable 
during this period.

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

• Raw data stream - documentation not supported

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

• Raw data stream - documentation not supported

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

SGP/SMOS/E7 - E7 SMOS lowered to surface to install counterweights

The E7 SMOS was lowered to the surface on 8 OCT 1999 between 0740 and 0755 GMT 
while counterweights were installed.  All temperature and humidity data are questionable 
during this period.

• Raw data stream - documentation not supported

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

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

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

• Raw data stream - documentation not supported

SGP/SMOS/E6 - E6 SMOS down for tower replacement

The E6 SMOS was shut down from 19 MAY 1999 at 2125 GMT until 27 MAY 1999 at 2000 GMT 
while the tower was replaced.

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

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

• Raw data stream - documentation not supported

• Raw data stream - documentation not supported

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

SGP/SMOS/E7 - E7 SMOS down for tower replacement

The E7 SMOS was shut down from 19 MAY 1999 at 1400 GMT until 9 JUN 1999 at 1940 GMT 
while the tower was replaced.

• Raw data stream - documentation not supported

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

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

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

• Raw data stream - documentation not supported