Data Quality Reports for Session: 143454 User: lovejoon82 Completed: 07/02/2012

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D000606.1SGP/MWR/C1 - IRT removedsgpmwrlosC1.a1, sgpmwrlosC1.b1
D030312.10SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperaturessgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrlosC1.a1, sgpmwrlosC1.b1


DQRID : D000606.1
Start DateStart TimeEnd DateEnd Time
10/19/1999223011/17/19992025
Subject:
SGP/MWR/C1 - IRT removed
DataStreams:sgpmwrlosC1.a1, sgpmwrlosC1.b1
Description:
There were no IRT data during this period because MWR #10, upon
which the IRT is mounted, was returned to the vendor for upgrades and
replaced with spare MWR #33 which does not have the mounting hardware
or the electronics to accept the IRT.
Measurements:sgpmwrlosC1.a1:
  • IR Brightness Temperature(sky_ir_temp)
sgpmwrlosC1.b1:
  • IR Brightness Temperature(sky_ir_temp)

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DQRID : D030312.10
Start DateStart TimeEnd DateEnd Time
11/17/1999180007/31/20022034
Subject:
SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures
DataStreams:sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrlosC1.a1, sgpmwrlosC1.b1
Description:
Several related and recurring problems with the SGP MWRs have been
reported dating back to 1999.  These problems were due to the
occurrence of blackbody signals (in counts) that were half of those
expected. The symptoms included noisy data (especially at Purcell),
spikes in the data (especially at Vici), negative brightness
temperatures, and apparent loss of serial communication between the
computer and the radiometer, which results in a self-termination of the
MWR program (especially at the CF).

Because these all initially appeared to be hardware-related problems,
the instrument mentor and SGP site operations personnel (1) repeatedly
cleaned and replaced the fiber optic comm. components, (2) swapped
radiometers, (3) sent radiometers back to Radiometrics for evaluation
(which has not revealed any instrument problems), and (4) reconfigured
the computer's operating system.  Despite several attempts to isolate
and correct it, the problem persisted.

It became apparent that some component of the Windows98 configuration
conflicted with the DOS-based MWR program or affected the serial port
or the contents of the serial port buffer. This problem was finally
corrected by upgrading the MWR software with a new Windows-compatible
program.
Measurements:sgp5mwravgC1.c1:
  • Total water vapor along LOS path(vap)
  • Total liquid water along LOS path(liq)
  • 31.4 GHz sky brightness temperature(tbsky31)
  • Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
sgp1mwravgC1.c1:
  • Total water vapor along LOS path(vap)
  • Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
  • 31.4 GHz sky brightness temperature(tbsky31)
  • Total liquid water along LOS path(liq)
sgpmwrlosC1.a1:
  • Total water vapor along LOS path(vap)
  • Total liquid water along LOS path(liq)
  • 31.4 GHz sky brightness temperature(tbsky31)
  • Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
sgpmwrlosC1.b1:
  • 31.4 GHz sky brightness temperature(tbsky31)
  • Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
  • Total liquid water along LOS path(liq)
  • Total water vapor along LOS path(vap)

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