Data Quality Reports for Session: 103219 User: bahrmann Completed: 12/13/2006


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D010202.2NSA/MWR/C1 - negative sky brightness temperaturesnsamwrlosC1.a1, nsamwrlosC1.b1
D020823.36NSA/MWR/C1 - Data spikes, possibly due to cleaning eventsnsamwrlosC1.a1, nsamwrlosC1.b1
D030312.6SGP/MWR/C1 - Intermittent Negative Sky Brightness TemperaturesnsamwrlosC1.a1, nsamwrlosC1.b1
D030822.7NSA/MWR/C1 - min/max/delta values incorrectnsamwrlosC1.b1


DQRID : D010202.2
Start DateStart TimeEnd DateEnd Time
02/03/2000000005/24/20001800
Subject:
NSA/MWR/C1 - negative sky brightness temperatures
DataStreams:nsamwrlosC1.a1, nsamwrlosC1.b1
Description:
The data exhibit occasional negative sky brightness temperatures.
The problem was corrected when the site operator cleaned the cable connectors and coated 
the terminals with dielectric grease.
Measurements:nsamwrlosC1.a1:
  • Mean total water vapor amount along LOS path(vap)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Mean total liquid water amount along LOS path(liq)
  • Mixer kinetic (physical) temperature(tkxc)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)

nsamwrlosC1.b1:
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean total water vapor amount along LOS path(vap)
  • Mean total liquid water amount along LOS path(liq)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)


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DQRID : D020823.36
Start DateStart TimeEnd DateEnd Time
12/16/1998180012/16/19981815
10/25/1999180010/25/19991810
11/04/1999190011/04/19991910
12/15/1999214012/15/19992210
02/29/2000185002/29/20001900
04/04/2000180004/04/20001830
04/06/2000181504/06/20001830
04/23/2000081004/23/20000830
05/16/2000043005/16/20000500
05/16/2000063005/16/20000700
05/16/2000153005/16/20001545
05/24/2000180005/24/20001815
Subject:
NSA/MWR/C1 - Data spikes, possibly due to cleaning events
DataStreams:nsamwrlosC1.a1, nsamwrlosC1.b1
Description:
Unreasonable spikes occurred, which may be due to cleaning of 
the instrument by the operator.  Other cleaning events did
not result in obvious data spikes and have not been included 
in this report.
Measurements:nsamwrlosC1.a1:
  • Mean total water vapor amount along LOS path(vap)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Mean total liquid water amount along LOS path(liq)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)

nsamwrlosC1.b1:
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean total water vapor amount along LOS path(vap)
  • Mean total liquid water amount along LOS path(liq)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)


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DQRID : D030312.6
Start DateStart TimeEnd DateEnd Time
11/07/1999180009/16/20021820
Subject:
SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures
DataStreams:nsamwrlosC1.a1, nsamwrlosC1.b1
Description:
Several related and recurring problems with the 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, spikes in the data, 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.

Because these all initially appeared to be hardware-related problems,
the instrument mentor and 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 did 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:nsamwrlosC1.a1:
  • Mean total water vapor amount along LOS path(vap)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Mean total liquid water amount along LOS path(liq)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)

nsamwrlosC1.b1:
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean total water vapor amount along LOS path(vap)
  • Mean total liquid water amount along LOS path(liq)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)


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DQRID : D030822.7
Start DateStart TimeEnd DateEnd Time
01/02/1998000002/08/20032359
Subject:
NSA/MWR/C1 - min/max/delta values incorrect
DataStreams:nsamwrlosC1.b1
Description:
The values of valid_min, valid_max, and valid_delta for fields tkxc and tknd were 
incorrect. They should be 303, 333, and 0.5 K, respectively.
Measurements:nsamwrlosC1.b1:
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise diode mount temperature(tknd)


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