DQRID : D991102.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/05/1999000006/08/19991710Suspect
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Subject:
SGP/MWR/B4 - power lines in field of view
DataStreams:sgp5mwravgB4.c1, sgpmwrtipB4.00, sgpmwrtipB4.a1, sgpmwrlosB4.a1, sgpmwrlosB4.b1,
sgpmwrlosB4.00
Description:
On 5 March 1999, the local power company installed transmission lines north 
of BF4 at an elevation angle of about 30 degrees from the MWR, in the field 
of view of tip scans. This affected the calibration of the instrument and 
the retrieved values of precipitable water vapor and liquid water path. 
On 8 June 1999 at 1710 GMT, the MWR was remotely rotated 90 degrees so the 
instrument would scan from east to west.
This reorientation has corrected the problem.
Suggestions: 
Reprocess the data using the calibration from the time just prior to the installation 

of the power lines.
Measurements:sgpmwrlosB4.00:
  • Raw data stream - documentation not supported
more
sgpmwrlosB4.a1:
  • vap
  • liq
more
sgpmwrtipB4.a1:
  • r31
  • bb31
  • tnd_nom23
  • tnd31I
  • tc23
  • bbn23
  • tipsky31
  • tnd23
  • bb23
  • r23
  • tipsky23
  • tnd_nom31
  • tc31
  • bbn31
  • tnd23I
  • tnd31
more
sgpmwrtipB4.00:
  • Raw data stream - documentation not supported
more
sgp5mwravgB4.c1:
  • 23tbsky
  • vap
  • liq_sdev
  • vap_sdev
  • tbsky31_sdev
  • tbsky23_sdev
  • 31tbsky
  • liq
more
sgpmwrlosB4.b1:
  • vap
  • tbsky23
  • liq
  • tbsky31
more

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