Data Quality Reports for Session: 110994 User: gaustad Completed: 03/13/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D961111.2SGP/TWR/C1 - Reprocess: RH recalibrationsgp1440twr25mC1.a0, sgp1440twr60mC1.a0, sgp1twr25mC1.a0, sgp1twr60mC1.a0, sgp30twr25mC1.a1,
sgp30twr60mC1.a1


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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