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/E7 - E7 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.

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

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

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/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/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/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/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/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