Data Quality Reports for Session: 125500 User: gaustad Completed: 01/27/2010

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040318.8SGP/SMOS/E13 - 6-month Calibration Checkssgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1
D961111.2SGP/TWR/C1 - Reprocess: RH recalibrationsgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
D970214.2SGP/SMOS/E13 - Questionable datasgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1
D970314.2SGP/TWR/C1 - RH Probe affected by tower damagesgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
D970325.5SGP/SMOS/E13 - T/RH Probe Malfunctionsgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1
D970325.6SGP/SMOS/E13 - T/RH Probe Malfunctionsgp1smosE13.a0, sgp30smosE13.a1
D970325.7SGP/SMOS/E13 - T/RH Probe Malfunctionsgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1
D970605.1SGP/TWR/C1 - Reprocess: 25m and 60m T/RH Comm Lines Switchedsgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1, sgp30twr60mC1.a1
D970925.1SGP/TWR/C1 - 25m Low battery voltage affected datasgp1twr25mC1.a0, sgp30twr25mC1.a1
D970925.2SGP/TWR/C1 - Incorrect temperature coefficientsgp1twr25mC1.a0, sgp30twr25mC1.a1
D971027.4SGP/TWR/C1 - SE 25m RH Incorrectsgp1twr10xC1.a1, sgp1twr10xC1.b1, sgp30twr10xC1.a1, sgp30twr10xC1.b1
D980114.2SGP/TWR/C1 - Tower lowered for maintenancesgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
D980306.1SGP/TWR/C1 - Westside 25m RH Probe Replacementsgp1440twr25mC1.a0, sgp1twr25mC1.a0, sgp30twr25mC1.a1
D980518.1SGP/TWR/C1 - West RH Probe Replacementsgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
D980528.11SGP/TWR/C1 - Tower SE-side lowered for maintenancesgp1twr10xC1.a1, sgp1twr10xC1.b1, sgp30twr10xC1.a1, sgp30twr10xC1.b1
D990415.5SGP/TWR/C1 - Missing datasgp1440twr60mC1.a0, sgp1twr60mC1.a0, sgp30twr60mC1.a1
D990421.1SGP/TWR/C1 - Missing datasgp1twr10xC1.a1, sgp1twr10xC1.b1, sgp30twr10xC1.a1, sgp30twr10xC1.b1
D991117.1SGP/TWR/C1 - SE side power lowsgp1twr10xC1.b1, sgp30twr10xC1.b1
D991117.2SGP/TWR/C1 - West-side power lowsgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
D991117.7SGP/TWR/C1 - West Side 25m RH Zerosgp1twr25mC1.a0, sgp30twr25mC1.a1


DQRID : D040318.8
Start DateStart TimeEnd DateEnd Time
06/17/1994141506/17/19941615
11/18/1994200011/18/19942100
05/05/1995194205/05/19952030
10/06/1995180010/06/19951858
05/03/1996185005/03/19962100
11/18/1996213011/19/19960030
04/20/1997000004/20/19972359
10/10/1997151510/10/19971845
05/07/1998203005/07/19982115
12/04/1998160012/04/19981621
04/09/1999173004/09/19992100
10/07/1999190010/07/19991945
04/20/2000172704/20/20001927
05/04/2000184405/04/20001910
10/19/2000191510/19/20002020
Subject:
SGP/SMOS/E13 - 6-month Calibration Checks
DataStreams:sgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1
Description:
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.
Measurements:sgp1440smosE13.a0:
  • 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)
sgp30smosE13.a1:
  • 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)
sgp1smosE13.a0:
  • 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)

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DQRID : D961111.2
Start DateStart TimeEnd DateEnd Time
05/23/1996000010/21/19961830
Subject:
SGP/TWR/C1 - Reprocess: RH recalibration
DataStreams:sgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
Description:
Comparisons of the RH probes with Oklahoma Mesonet probes in the laboratory and 
comparisons of the RH probes with the EBBR over a four day period after the Water Vapor IOP 
indicate the TOWER RH probes were incorrectly  calibrated. Corrections required are summarized 
below.

60 meter level: 
RH data greater than 85% are incorrect for 23 May 1996 through 10 September 2000 GMT.

RH data for 10 September 2330 GMT through 13 September 2130 GMT can be corrected with the 
following equation:
  -1.6 + 0.955*RH 
for original RH of 83% or less. Original RH values of greater than 83% cannot be 
adequately corrected.

RH data for 14 September 0000 GMT through 30 September 2000 GMT can be corrected with the 
equation:
  -1.6 + 0.87*RH
for original RH of 83% or less. Original RH values of greater than 83% cannot be 
adequately corrected. 

RH data for 30 September 2030 GMT through 21 October 1830 GMT can be corrected with the 
equation: 
  0.3 + 1.107*RH
for original RH of 85% or less.  Original RH values of greater than 85% cannot be 
adequately corrected. 


25 meter level:
RH data greater than 90% are incorrect for 23 May 1996 through 10 September 2000 GMT.

RH data for 10 September 0000 GMT through 21 October 1830 GMT can be corrected with the 
equation:
  4.098 + 0.953*RH 
for original RH of 90% or less.  Original RH values of greater than 90% cannot be 
adequately corrected. 

Vapor pressure is also incorrect because RH was incorrect.  Recalculate vapor pressure 
from the recalibrated RH.
Measurements:sgp30twr25mC1.a1:
  • Standard Deviation of Relative Humidity(sd_rh)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr60mC1.a0:
  • Relative humidity inside the instrument enclosure(rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1440twr60mC1.a0:
  • Maximum Relative Humidity(max_rh)
  • Maximum Vapor Pressure(max_vap_pres)
  • Minimum Vapor Pressure(min_vap_pres)
  • Minimum Relative Humidity(min_rh)
sgp30twr60mC1.a1:
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr25mC1.a0:
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
sgp1440twr25mC1.a0:
  • Maximum Vapor Pressure(max_vap_pres)
  • Minimum Relative Humidity(min_rh)
  • Maximum Relative Humidity(max_rh)
  • Minimum Vapor Pressure(min_vap_pres)

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DQRID : D970214.2
Start DateStart TimeEnd DateEnd Time
11/13/1996000001/30/19971930
Subject:
SGP/SMOS/E13 - Questionable data
DataStreams:sgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1
Description:
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.
Measurements:sgp1440smosE13.a0:
  • 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)
sgp30smosE13.a1:
  • 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)
sgp1smosE13.a0:
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D970314.2
Start DateStart TimeEnd DateEnd Time
10/22/1996173002/05/19971400
Subject:
SGP/TWR/C1 - RH Probe affected by tower damage
DataStreams:sgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
Description:
On Feb. 3 and 4 the SGP CART 60 m tower western elevator was repaired.
This included the replacement of cables on the 60 m carriage and connectors on
the 25 m carriage.  Although damaged, the 60 m carriage cable had been 
temporarily repaired by Site Operations several months ago, with apparent 
success.  However, evidence since then suggests that the repair was not 
totally successful.  Tests since then suggest that the low return for the 
RH sensor may have been floating, or at least the connection was poor.  At 
the same time, the 25 m carriage connectors and tower receptacles were bent
in planes perpendicular to each other, apparently resulting in the same 
condition as existed for the 60 m carriage.  The damage was partially the
result of improper routing of the cables on the 60 m carriage by the tower 
installer and partially the result of improper parking of the carriages 
(damaging the 25 m carriage connectors and receptacles).  The cables were 
reoriented and the connectors and receptacles replaced by the tower 
installer on 3-4 Feb 97.

Because of the damage to the 25 m carriage connectors, the 25 m carriage 
was left off of the tower and no correct data was collected from the 25 m 
level from 22 Oct 97 at 1730 GMT until 4 Feb 97 at 1400 GMT.  Only the 60 m 
level reported useful data during this period.  During this period a slope 
of 1.107 was applied in the datalogger programming before the 60 m RH value
was output to the logger memory.  Calibrations of the probe by Vaisala last 
month show that the logger slope was appropriate for the sensor behavior at RH 
less than 85%.  Calibration of sensors SN 109 and 231 by Vaisala showed the 
outputs to be several percent low near 0% RH and nearly correct at 100%.  The 
calibrations by the original manufacturer caused the outputs to be outside 
the specifications for the bottom 3/4 of the sensors' range.  Vaisala 
adjusted the slope and offset for both sensors.

In use at 60 m on the tower, the RH probe slope changed above 85% RH, becoming
larger with increasing RH.  At saturation the 60 m sensor RH value was being 
reported as 110.7% to 111.0% (in other words the slope in the logger of 
1.107 X 100%).  Apparently, at higher voltages the poor low side connection 
was less of a factor in the voltage output by the probe.  Comparison with 
sonde data for RH above 85% yields the correction in the next paragraph.

Therefore, my recommendation for the period listed above is to use the 60 m 
RH data as is for RH less than 85%.  Reported RH above 85% can be roughly 
corrected with the following: actual RH = 36 + 0.577 X (60 m reported RH) . 

Vapor pressure can then be recalculated by the user from the correct RH 
values and the temperature.

On Feb. 4 and 5, I conducted a number of tests on the carriages and RH 
probes (SN 231 at 25 m, SN 109 at 60 m), then replaced the RH probes with 
the probes recently (SN 234 at 25 m, SN 226 at 60 m) calibrated by Vaisala.  

One minute 60 m T and RH data is extremely consistent with the data 
from the sonde at 60 m height since 5 Feb 1997.  In fact, the 
comparisons have never been better, reflecting the problem with obtaining 
correct calibrations from the original manufacturer (even before the tower 
was damaged), and the problems created by the damage on the tower.

The problems resulting from damage to the tower carriage cables and 
connectors began around June 1995 (although the 60 m AC cable and 25 m 
receptacles had been damaged at least twice previously).  I made a number of
corrections to the RH data between June 1995 and when the tower was 
repaired this past February. 

25 and 60 m T and RH data since the tower repairs and the Feb. 5, 1997 
replacement of the RH probes are very consistent with the sonde data.  The 
only significant difference between the 60 m RH probe and the sonde RH probe 
occurs when the surface to 60 m RH gradient is large; this is expected since 
the RH probe on the sonde cannot respond to large changes in gradient quickly 
enough to produce the same measurement as the 60 m tower RH probe.

I will continue to compare the sonde, SMOS, and tower sensors for data quality 
purposes, as I have routinely for the past year.
Measurements:sgp30twr25mC1.a1:
  • Standard Deviation of Relative Humidity(sd_rh)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr60mC1.a0:
  • Relative humidity inside the instrument enclosure(rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1440twr60mC1.a0:
  • Maximum Relative Humidity(max_rh)
  • Maximum Vapor Pressure(max_vap_pres)
  • Minimum Vapor Pressure(min_vap_pres)
  • Minimum Relative Humidity(min_rh)
sgp30twr60mC1.a1:
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr25mC1.a0:
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
sgp1440twr25mC1.a0:
  • Maximum Vapor Pressure(max_vap_pres)
  • Minimum Relative Humidity(min_rh)
  • Maximum Relative Humidity(max_rh)
  • Minimum Vapor Pressure(min_vap_pres)

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DQRID : D970325.5
Start DateStart TimeEnd DateEnd Time
02/20/1997073002/22/19971230
Subject:
SGP/SMOS/E13 - T/RH Probe Malfunction
DataStreams:sgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1
Description:
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.
Measurements:sgp1440smosE13.a0:
  • 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)
sgp30smosE13.a1:
  • 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)
sgp1smosE13.a0:
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Beam 0 Temperature(temp)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D970325.6
Start DateStart TimeEnd DateEnd Time
02/26/1997153002/26/19972130
Subject:
SGP/SMOS/E13 - T/RH Probe Malfunction
DataStreams:sgp1smosE13.a0, sgp30smosE13.a1
Description:
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.
Measurements:sgp30smosE13.a1:
  • 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)
sgp1smosE13.a0:
  • Relative humidity inside the instrument enclosure(rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Beam 0 Temperature(temp)

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DQRID : D970325.7
Start DateStart TimeEnd DateEnd Time
02/27/1997023002/27/19971630
Subject:
SGP/SMOS/E13 - T/RH Probe Malfunction
DataStreams:sgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1
Description:
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.
Measurements:sgp1440smosE13.a0:
  • 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)
sgp30smosE13.a1:
  • 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)
sgp1smosE13.a0:
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Beam 0 Temperature(temp)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D970605.1
Start DateStart TimeEnd DateEnd Time
03/03/1997163005/28/19972110
Subject:
SGP/TWR/C1 - Reprocess: 25m and 60m T/RH Comm Lines Switched
DataStreams:sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1, sgp30twr60mC1.a1
Description:
On 3 March 1997 an activity of unknown nature took place at SGP, causing 
the communication lines to the 25 and 60 meter T/RH to be switched.  The 
data indicates that the switch occurred between 1630 and 1700 GMT.  I 
submitted a work request to site operations to determine if the two levels 
were switched; they found that they were, as I suspected.  It is not clear 
where this occurred, although we do know that it did not happen at the 
tower CR21X dataloggers location.  The communication lines were temporarily 
"switched back" at the logger location on May 28 at 2110 GMT until it can be 
determined where the switch was actually made.
Measurements:sgp30twr25mC1.a1:
  • Standard Deviation of Relative Humidity(sd_rh)
  • Standard Deviation of Air Temperature(sd_temp)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr60mC1.a0:
  • Relative humidity inside the instrument enclosure(rh)
  • Beam 0 Temperature(temp)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp30twr60mC1.a1:
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Standard Deviation of Air Temperature(sd_temp)
  • Relative humidity inside the instrument enclosure(rh)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr25mC1.a0:
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Beam 0 Temperature(temp)

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DQRID : D970925.1
Start DateStart TimeEnd DateEnd Time
09/02/1997200409/04/19972057
Subject:
SGP/TWR/C1 - 25m Low battery voltage affected data
DataStreams:sgp1twr25mC1.a0, sgp30twr25mC1.a1
Description:
Shortly after 2003 GMT on 2 September 1997 a GFCI circuit breaker tripped in the tower 
base AC box, resulting in a drop in CR21X voltage of 0.4 volts in seven minutes.  This 
resulted in a steady drop in battery voltage for the next 30 hours, and incorrect, out of 
range, or missing values for temp, rh, and vap_pres.
Measurements:sgp30twr25mC1.a1:
  • lat(lat)
  • Time offset of tweaks from base_time(time_offset)
  • lon(lon)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Standard Deviation of Air Temperature(sd_temp)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • base time(base_time)
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • Beam 0 Temperature(temp)
  • Dummy altitude for Zeb(alt)
sgp1twr25mC1.a0:
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • Batter Voltage(vbat)
  • Dummy altitude for Zeb(alt)
  • Time offset of tweaks from base_time(time_offset)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • lat(lat)
  • base time(base_time)
  • lon(lon)
  • Beam 0 Temperature(temp)

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DQRID : D970925.2
Start DateStart TimeEnd DateEnd Time
09/04/1997205809/25/19972100
Subject:
SGP/TWR/C1 - Incorrect temperature coefficient
DataStreams:sgp1twr25mC1.a0, sgp30twr25mC1.a1
Description:
When the power was restored to the TWR25m following a battery failure, the program 
downloaded to the logger had an old coefficient in it for temperature (1.0043; should be 
1.0041).  The difference in temperature reported was less than 0.05 degrees; this data does not 
need to be corrected. Site Operations corrected the coefficient on 25 September 1997.
Measurements:sgp30twr25mC1.a1:
  • Standard Deviation of Air Temperature(sd_temp)
  • Beam 0 Temperature(temp)
sgp1twr25mC1.a0:
  • Beam 0 Temperature(temp)

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DQRID : D971027.4
Start DateStart TimeEnd DateEnd Time
09/12/1997000009/26/19972047
Subject:
SGP/TWR/C1 - SE 25m RH Incorrect
DataStreams:sgp1twr10xC1.a1, sgp1twr10xC1.b1, sgp30twr10xC1.a1, sgp30twr10xC1.b1
Description:
The RH and therefore vapor pressure measurements on the 25 meter level, southeast side of 
the 60 m tower (data from CR10X) were incorrect because the relative humidity portion of 
the T/RH probe malfunctioned.  It is unknown at what day and time the failure occurred 
(it should be obvious from the data), although it was in the middle of the Fall combined 
IOP; I was not receiving the data at the time. The T/RH probe was replaced on 26 September.
Measurements:sgp1twr10xC1.b1:
  • Relative humidity at 60 m(rh_60m)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Relative humidity at 25 m(rh_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
sgp30twr10xC1.a1:
  • Standard Deviation of 60 m Vapor Pressure(sd_vap_pres_60m)
  • Standard Deviation of 25 m Vapor Pressure(sd_vap_pres_25m)
  • Relative humidity at 25 m(rh_25m)
  • Standard Deviation of 25 m Relative Humidity(sd_rh_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Relative humidity at 60 m(rh_60m)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Standard Deviation of 60 m Relative Humidity(sd_rh_60m)
sgp1twr10xC1.a1:
  • Relative humidity at 60 m(rh_60m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Relative humidity at 25 m(rh_25m)
sgp30twr10xC1.b1:
  • Vapor pressure at 25 m(vap_pres_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Standard Deviation of 60 m Vapor Pressure(sd_vap_pres_60m)
  • Standard Deviation of 25 m Relative Humidity(sd_rh_25m)
  • Relative humidity at 25 m(rh_25m)
  • Relative humidity at 60 m(rh_60m)
  • Standard Deviation of 60 m Relative Humidity(sd_rh_60m)
  • Standard Deviation of 25 m Vapor Pressure(sd_vap_pres_25m)

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DQRID : D980114.2
Start DateStart TimeEnd DateEnd Time
05/21/1996153005/24/19961700
05/01/1997172405/01/19971911
05/09/1997145405/09/19971501
08/05/1997180408/05/19972012
08/13/1997160008/14/19971602
09/10/1997191509/10/19971950
09/11/1997130009/11/19972230
09/26/1997201009/26/19972047
12/19/1997205812/19/19972211
01/27/1998175001/27/19981840
03/13/1998164803/13/19981725
03/13/1998193303/13/19982020
04/24/1998141604/24/19981504
05/22/1998135905/22/19981443
07/16/1998144207/16/19981512
10/15/1998132910/15/19981530
10/16/1998134610/16/19981530
Subject:
SGP/TWR/C1 - Tower lowered for maintenance
DataStreams:sgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
Description:
The west-side tower elevators were lowered for maintenance and/or data are offscale during 
routine maintenance.
Measurements:sgp30twr25mC1.a1:
  • Standard Deviation of Air Temperature(sd_temp)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Beam 0 Temperature(temp)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Relative humidity inside the instrument enclosure(rh)
sgp1twr60mC1.a0:
  • Relative humidity inside the instrument enclosure(rh)
  • Beam 0 Temperature(temp)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1440twr60mC1.a0:
  • Maximum Relative Humidity(max_rh)
  • Maximum Temperature(max_temp)
  • Time of Minimum Relative Humidity(time_min_rh)
  • Time of Maximum Temperature(time_max_temp)
  • Minimum Temperature(min_temp)
  • Time of Maximum Relative Humidity(time_max_rh)
  • Maximum Vapor Pressure(max_vap_pres)
  • Time of Maximum Vapor Pressure(time_max_vap_pres)
  • Time of Minimum Temperature(time_min_temp)
  • Time of Minimum Vapor Pressure(time_min_vap_pres)
  • Minimum Vapor Pressure(min_vap_pres)
  • Minimum Relative Humidity(min_rh)
sgp30twr60mC1.a1:
  • Beam 0 Temperature(temp)
  • Standard Deviation of Air Temperature(sd_temp)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr25mC1.a0:
  • Beam 0 Temperature(temp)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
sgp1440twr25mC1.a0:
  • Time of Maximum Relative Humidity(time_max_rh)
  • Time of Maximum Vapor Pressure(time_max_vap_pres)
  • Minimum Relative Humidity(min_rh)
  • Maximum Relative Humidity(max_rh)
  • Minimum Temperature(min_temp)
  • Time of Minimum Relative Humidity(time_min_rh)
  • Time of Minimum Temperature(time_min_temp)
  • Maximum Temperature(max_temp)
  • Maximum Vapor Pressure(max_vap_pres)
  • Time of Maximum Temperature(time_max_temp)
  • Time of Minimum Vapor Pressure(time_min_vap_pres)
  • Minimum Vapor Pressure(min_vap_pres)

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DQRID : D980306.1
Start DateStart TimeEnd DateEnd Time
01/05/1998224702/13/19982015
Subject:
SGP/TWR/C1 - Westside 25m RH Probe Replacement
DataStreams:sgp1440twr25mC1.a0, sgp1twr25mC1.a0, sgp30twr25mC1.a1
Description:
The 25 meter west RH part of the T/RH probe died suddenly on 5 January at about 2247 GMT.  
All RH and vapor pressure from that probe are incorrect until 13 February at 2015 GMT, 
after replacement of the probe.
Measurements:sgp30twr25mC1.a1:
  • 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)
sgp1twr25mC1.a0:
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
sgp1440twr25mC1.a0:
  • Time of Minimum Relative Humidity(time_min_rh)
  • Time of Maximum Relative Humidity(time_max_rh)
  • Maximum Vapor Pressure(max_vap_pres)
  • Minimum Relative Humidity(min_rh)
  • Time of Maximum Vapor Pressure(time_max_vap_pres)
  • Maximum Relative Humidity(max_rh)
  • Time of Minimum Vapor Pressure(time_min_vap_pres)
  • Minimum Vapor Pressure(min_vap_pres)

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DQRID : D980518.1
Start DateStart TimeEnd DateEnd Time
11/04/1997203011/05/19972230
Subject:
SGP/TWR/C1 - West RH Probe Replacement
DataStreams:sgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
Description:
On 4-5 November 1997, the Qualimetrics RH probes were removed from the west
elevator 25 and 60 meter levels and replaced with Vaisala probes.  The
Vaisala probes had to be inserted upside down in the Qualimetrics
aspirators to make them fit.  Data during the period above is incorrect.
The west temperature probes appeared to need recalibration, so that was
done on 5 November.  Little improvement in the comparison of west and
southeast carriage temperatures can be detected in the data after 5
November.  RH comparisons show that the west and southeast side Vaisala
probes agree within 1% normally, with only a very occasional 3% to 4%
difference (when RH is greater than 90%).  West side temperatures are normally
greater in the daytime especially, an indication that the aspiration rate in
the west side aspirators is marginal, as I reported when they were installed 5
years ago.  The west side metal aspirators also have more thermal mass than the
plastic southeast aspirators; the combination of this with the lower aspiration
rate causes the west side temperatures to not drop as rapidly as those
measured on the southeast side when the temperature is decreasing.  The west
side temperatures are often 0.2 to 0.6 degrees higher than the southeast
side during the midday.  Obviously, when the temperature differences are large,
the RH tends to be slightly smaller on the west side.

The vapor pressure differences between the west and southeast sides are very
small, 0.03 kPa or less, usually much less, a result that should make the
WVIOP community happy.
Measurements:sgp30twr25mC1.a1:
  • Standard Deviation of Relative Humidity(sd_rh)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr60mC1.a0:
  • Relative humidity inside the instrument enclosure(rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1440twr60mC1.a0:
  • Maximum Relative Humidity(max_rh)
  • Maximum Vapor Pressure(max_vap_pres)
  • Minimum Vapor Pressure(min_vap_pres)
  • Minimum Relative Humidity(min_rh)
sgp30twr60mC1.a1:
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr25mC1.a0:
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
sgp1440twr25mC1.a0:
  • Maximum Vapor Pressure(max_vap_pres)
  • Minimum Relative Humidity(min_rh)
  • Maximum Relative Humidity(max_rh)
  • Minimum Vapor Pressure(min_vap_pres)

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DQRID : D980528.11
Start DateStart TimeEnd DateEnd Time
09/26/1997201009/26/19972047
10/24/1997174610/24/19971823
05/01/1998182705/01/19981936
05/18/1998194705/18/19982106
07/16/1998144207/16/19981512
08/03/1998190408/03/19982035
08/06/1998191808/06/19981939
12/08/1998210712/08/19982200
05/19/1999175505/19/19991915
07/02/1999172007/02/19991735
09/07/1999161009/07/19991641
09/15/1999135309/15/19991536
09/15/1999175009/15/19991850
09/16/1999184609/16/19991933
11/15/1999201111/15/19992220
11/16/1999170111/16/19991827
11/18/1999162111/18/19991748
11/19/1999141511/19/19991615
01/06/2000194201/06/20002127
08/14/2000144708/14/20002138
11/27/2000184211/27/20002016
11/29/2000140011/29/20001446
05/04/2001183905/04/20011855
05/14/2001145405/14/20011507
05/18/2001170705/18/20011720
07/12/2001210307/12/20012136
07/13/2001201807/13/20012141
07/20/2001145107/20/20011657
08/07/2001134308/07/20011841
08/08/2001135608/08/20011901
09/26/2001183409/26/20012122
09/27/2001150409/27/20011918
10/02/2001154910/02/20011610
10/02/2001200610/02/20012103
10/04/2001182810/04/20011913
11/12/2001205011/12/20012110
12/19/2001205512/19/20012121
04/11/2002200304/11/20022131
08/01/2002133008/01/20022201
08/02/2002135408/02/20021912
09/03/2002193709/03/20022032
09/10/2002173409/10/20021843
10/24/2002141810/24/20021436
10/25/2002180610/31/20021621
10/31/2002191410/31/20022209
11/06/2002155211/06/20021804
11/06/2002201711/06/20022222
11/07/2002155711/07/20021731
12/16/2002163112/16/20021710
12/18/2002203712/18/20022140
01/30/2003165501/30/20031814
02/21/2003195502/21/20032057
02/22/2003191702/22/20032110
03/17/2003162203/17/20031704
03/21/2003182503/21/20032027
08/14/2003144508/14/20031521
08/14/2003190208/14/20031937
08/15/2003134408/15/20031945
08/19/2003141608/19/20031604
10/06/2003171310/06/20031828
Subject:
SGP/TWR/C1 - Tower SE-side lowered for maintenance
DataStreams:sgp1twr10xC1.a1, sgp1twr10xC1.b1, sgp30twr10xC1.a1, sgp30twr10xC1.b1
Description:
The SE-side carriage was lowered for maintenance and/or data values are off-scale during 
maintenance.
Measurements:sgp1twr10xC1.b1:
  • Vapor pressure at 25 m(vap_pres_25m)
  • Temperature at 25 m(temp_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Temperature at 60 m(temp_60m)
  • Relative humidity at 60 m(rh_60m)
  • Relative humidity at 25 m(rh_25m)
sgp30twr10xC1.a1:
  • Standard Deviation of 25 m Temperature(sd_temp_25m)
  • Standard Deviation of 25 m Vapor Pressure(sd_vap_pres_25m)
  • Temperature at 25 m(temp_25m)
  • Relative humidity at 25 m(rh_25m)
  • Standard Deviation of 25 m Relative Humidity(sd_rh_25m)
  • Relative humidity at 60 m(rh_60m)
  • Standard Deviation of 60 m Temperature(sd_temp_60m)
  • Standard Deviation of 60 m Vapor Pressure(sd_vap_pres_60m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Temperature at 60 m(temp_60m)
  • Standard Deviation of 60 m Relative Humidity(sd_rh_60m)
sgp1twr10xC1.a1:
  • Temperature at 25 m(temp_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Temperature at 60 m(temp_60m)
  • Relative humidity at 60 m(rh_60m)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Relative humidity at 25 m(rh_25m)
sgp30twr10xC1.b1:
  • Vapor pressure at 25 m(vap_pres_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Temperature at 60 m(temp_60m)
  • Standard Deviation of 60 m Vapor Pressure(sd_vap_pres_60m)
  • Standard Deviation of 60 m Relative Humidity(sd_rh_60m)
  • Standard Deviation of 25 m Vapor Pressure(sd_vap_pres_25m)
  • Temperature at 25 m(temp_25m)
  • Standard Deviation of 25 m Temperature(sd_temp_25m)
  • Standard Deviation of 25 m Relative Humidity(sd_rh_25m)
  • Relative humidity at 60 m(rh_60m)
  • Relative humidity at 25 m(rh_25m)
  • Standard Deviation of 60 m Temperature(sd_temp_60m)

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DQRID : D990415.5
Start DateStart TimeEnd DateEnd Time
02/18/1996210502/20/19960057
06/21/1996064306/26/19962241
10/26/1997220610/28/19970100
Subject:
SGP/TWR/C1 - Missing data
DataStreams:sgp1440twr60mC1.a0, sgp1twr60mC1.a0, sgp30twr60mC1.a1
Description:
Data are missing and unrecoverable.
Measurements:sgp1twr60mC1.a0:
  • Dummy altitude for Zeb(alt)
  • base time(base_time)
  • Time offset of tweaks from base_time(time_offset)
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • lon(lon)
  • Relative humidity inside the instrument enclosure(rh)
  • Beam 0 Temperature(temp)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • lat(lat)
  • Batter Voltage(vbat)
sgp1440twr60mC1.a0:
  • Maximum Relative Humidity(max_rh)
  • Maximum Temperature(max_temp)
  • Time of Minimum Relative Humidity(time_min_rh)
  • Time of Maximum Temperature(time_max_temp)
  • base time(base_time)
  • Dummy altitude for Zeb(alt)
  • Minimum Temperature(min_temp)
  • Time of Maximum Relative Humidity(time_max_rh)
  • Maximum Vapor Pressure(max_vap_pres)
  • lon(lon)
  • Time of Maximum Vapor Pressure(time_max_vap_pres)
  • lat(lat)
  • Time of Minimum Temperature(time_min_temp)
  • Time offset of tweaks from base_time(time_offset)
  • Time of Minimum Vapor Pressure(time_min_vap_pres)
  • Minimum Vapor Pressure(min_vap_pres)
  • Minimum Relative Humidity(min_rh)
sgp30twr60mC1.a1:
  • Beam 0 Temperature(temp)
  • lat(lat)
  • Standard Deviation of Air Temperature(sd_temp)
  • lon(lon)
  • Dummy altitude for Zeb(alt)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • base time(base_time)
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • Relative humidity inside the instrument enclosure(rh)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Time offset of tweaks from base_time(time_offset)
  • Vapor Pressure (kiloPascals)(vap_pres)

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DQRID : D990421.1
Start DateStart TimeEnd DateEnd Time
09/18/1997003609/22/19970130
08/21/1998200409/18/19981538
10/31/1998110411/03/19981500
08/08/1999000008/08/19992359
10/18/2000150410/20/20001150
12/16/2000000012/18/20001214
02/08/2002044302/19/20021615
02/22/2002173902/25/20021918
03/09/2002200203/11/20022001
12/14/2002070212/16/20021330
10/06/2003170210/08/20031401
Subject:
SGP/TWR/C1 - Missing data
DataStreams:sgp1twr10xC1.a1, sgp1twr10xC1.b1, sgp30twr10xC1.a1, sgp30twr10xC1.b1
Description:
Data are missing and unrecoverable.
Measurements:sgp1twr10xC1.b1:
  • Temperature at 25 m(temp_25m)
  • base time(base_time)
  • Dummy altitude for Zeb(alt)
  • lon(lon)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Temperature at 60 m(temp_60m)
  • lat(lat)
  • Relative humidity at 60 m(rh_60m)
  • Relative humidity at 25 m(rh_25m)
  • Batter Voltage(vbat)
  • Time offset of tweaks from base_time(time_offset)
sgp30twr10xC1.a1:
  • Dummy altitude for Zeb(alt)
  • Temperature at 25 m(temp_25m)
  • Relative humidity at 25 m(rh_25m)
  • Time offset of tweaks from base_time(time_offset)
  • Standard Deviation of 60 m Temperature(sd_temp_60m)
  • lon(lon)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Temperature at 60 m(temp_60m)
  • Standard Deviation of 25 m Temperature(sd_temp_25m)
  • Standard Deviation of 25 m Vapor Pressure(sd_vap_pres_25m)
  • Standard Deviation of 25 m Relative Humidity(sd_rh_25m)
  • Relative humidity at 60 m(rh_60m)
  • lat(lat)
  • Standard Deviation of 60 m Vapor Pressure(sd_vap_pres_60m)
  • base time(base_time)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Standard Deviation of 60 m Relative Humidity(sd_rh_60m)
sgp1twr10xC1.a1:
  • Temperature at 25 m(temp_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • base time(base_time)
  • lon(lon)
  • Batter Voltage(vbat)
  • Time offset of tweaks from base_time(time_offset)
  • Dummy altitude for Zeb(alt)
  • Temperature at 60 m(temp_60m)
  • lat(lat)
  • Relative humidity at 60 m(rh_60m)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Relative humidity at 25 m(rh_25m)
sgp30twr10xC1.b1:
  • Vapor pressure at 60 m(vap_pres_60m)
  • Temperature at 60 m(temp_60m)
  • Standard Deviation of 60 m Vapor Pressure(sd_vap_pres_60m)
  • Standard Deviation of 60 m Relative Humidity(sd_rh_60m)
  • Temperature at 25 m(temp_25m)
  • base time(base_time)
  • Standard Deviation of 25 m Relative Humidity(sd_rh_25m)
  • Relative humidity at 60 m(rh_60m)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Time offset of tweaks from base_time(time_offset)
  • lon(lon)
  • Standard Deviation of 25 m Vapor Pressure(sd_vap_pres_25m)
  • Dummy altitude for Zeb(alt)
  • lat(lat)
  • Standard Deviation of 25 m Temperature(sd_temp_25m)
  • Relative humidity at 25 m(rh_25m)
  • Standard Deviation of 60 m Temperature(sd_temp_60m)

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DQRID : D991117.1
Start DateStart TimeEnd DateEnd Time
01/04/1998094001/07/19982117
Subject:
SGP/TWR/C1 - SE side power low
DataStreams:sgp1twr10xC1.b1, sgp30twr10xC1.b1
Description:
A power outage caused a GFCI breaker to trip.  This removed power from the instruments on 
the tower.  Temperature, relative humidity, and the calculated vapor pressure at both 25 
m and 60 m levels are suspect because the sensors were not properly aspirated.
Measurements:sgp1twr10xC1.b1:
  • Relative humidity at 60 m(rh_60m)
  • Vapor pressure at 25 m(vap_pres_25m)
  • Relative humidity at 25 m(rh_25m)
  • Temperature at 25 m(temp_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Temperature at 60 m(temp_60m)
  • Batter Voltage(vbat)
sgp30twr10xC1.b1:
  • Vapor pressure at 25 m(vap_pres_25m)
  • Vapor pressure at 60 m(vap_pres_60m)
  • Standard Deviation of 25 m Temperature(sd_temp_25m)
  • Temperature at 60 m(temp_60m)
  • Standard Deviation of 60 m Vapor Pressure(sd_vap_pres_60m)
  • Standard Deviation of 25 m Relative Humidity(sd_rh_25m)
  • Relative humidity at 25 m(rh_25m)
  • Relative humidity at 60 m(rh_60m)
  • Standard Deviation of 60 m Relative Humidity(sd_rh_60m)
  • Standard Deviation of 60 m Temperature(sd_temp_60m)
  • Standard Deviation of 25 m Vapor Pressure(sd_vap_pres_25m)
  • Temperature at 25 m(temp_25m)

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DQRID : D991117.2
Start DateStart TimeEnd DateEnd Time
01/04/1998114401/04/19981420
Subject:
SGP/TWR/C1 - West-side power low
DataStreams:sgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1
Description:
A power outage caused a GFCI breaker to trip.  This removed power from the instruments on 
the tower. Temperature, relative humidity, and the calculated vapor pressure at both 25m 
and 60m levels are suspect because the sensors were not properly aspirated.
Measurements:sgp30twr25mC1.a1:
  • Standard Deviation of Air Temperature(sd_temp)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • Beam 0 Temperature(temp)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Relative humidity inside the instrument enclosure(rh)
sgp1twr60mC1.a0:
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • Relative humidity inside the instrument enclosure(rh)
  • Beam 0 Temperature(temp)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Batter Voltage(vbat)
sgp1440twr60mC1.a0:
  • Maximum Relative Humidity(max_rh)
  • Maximum Temperature(max_temp)
  • Minimum Temperature(min_temp)
  • Maximum Vapor Pressure(max_vap_pres)
  • Minimum Vapor Pressure(min_vap_pres)
  • Minimum Relative Humidity(min_rh)
sgp30twr60mC1.a1:
  • Beam 0 Temperature(temp)
  • Standard Deviation of Air Temperature(sd_temp)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • Relative humidity inside the instrument enclosure(rh)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
sgp1twr25mC1.a0:
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • Beam 0 Temperature(temp)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
sgp1440twr25mC1.a0:
  • Minimum Relative Humidity(min_rh)
  • Maximum Relative Humidity(max_rh)
  • Minimum Temperature(min_temp)
  • Maximum Temperature(max_temp)
  • Maximum Vapor Pressure(max_vap_pres)
  • Minimum Vapor Pressure(min_vap_pres)

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DQRID : D991117.7
Start DateStart TimeEnd DateEnd Time
01/05/1998224702/13/19982007
Subject:
SGP/TWR/C1 - West Side 25m RH Zero
DataStreams:sgp1twr25mC1.a0, sgp30twr25mC1.a1
Description:
On 5 January 1998, decreased battery voltage in the CR21X datalogger for the 25m level of 
the west side of the SGP CF tower apparently damaged the electronics of the RH probe.  
The RH was zero (and the vapor pressure was therefore incorrect) during the period. The RH 
probe was replaced.
Measurements:sgp30twr25mC1.a1:
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • Standard Deviation of Air Temperature(sd_temp)
  • Standard Deviation of Relative Humidity(sd_rh)
  • Beam 0 Temperature(temp)
  • Standard Deviation of Vapor Pressure(sd_vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
sgp1twr25mC1.a0:
  • Aspirator Flow Status (% of time with proper flow)(aspirator)
  • Batter Voltage(vbat)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Beam 0 Temperature(temp)

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END OF DATA