Data Quality Reports for Session: 104911 User: austin Completed: 03/23/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D001122.1SGP/MWR/C1 - calibration checkssgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1
D001205.1SGP/MWR/C1 - Time driftsgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1
D010215.5SGP/MWR/C1 - IRT failuresgpmwrlosC1.a1, sgpmwrlosC1.b1
D030312.10SGP/MWR/C1 - Intermittent Negative Sky Brightness TemperaturessgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgC1.c1
D040824.1SGP/MWR/C1 - Wet window flag "on" more frequently than expectedsgpmwrlosC1.a1, sgpmwrlosC1.b1


DQRID : D001122.1
Start DateStart TimeEnd DateEnd Time
02/16/2000221002/16/20002250
09/21/2000142309/21/20001434
09/21/2000150609/21/20001517
09/26/2000142609/26/20001434
10/02/2000173210/02/20001752
10/02/2000205210/02/20002107
10/03/2000140610/03/20001421
09/06/2001190009/06/20012000
Subject:
SGP/MWR/C1 - calibration checks
DataStreams:sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1
Description:
The MWR calibration was checked by a cryogenic (liquid nitrogen) 
blackbody target or (in the case of the Sept 2001 time period)
by pointing the mirror at an internal blackbody target.  The 
brightness temperatures and vap and liq retrievals are not
representative of the sky/atmosphere.
Measurements:sgpmwrtipC1.a1:
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)

sgpmwrlosC1.b1:
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Mean total water vapor amount along LOS path(vap)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean total liquid water amount along LOS path(liq)

sgpmwrlosC1.a1:
  • Mean total liquid water amount along LOS path(liq)
  • Mean total water vapor amount along LOS path(vap)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)


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DQRID : D001205.1
Start DateStart TimeEnd DateEnd Time
05/05/2000195509/18/20002145
Subject:
SGP/MWR/C1 - Time drift
DataStreams:sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1
Description:
On 9/18/00, I found that the time on the MWR laptop was 1m 21s slow. The Dimension4 
utility had last synchronized the time on 5/5/00. Found that the network DNS settings had been 
disabled. Added the DNS entry for ntp host CF10. Dimension4 synchronized the clock by 
adding 80.91s. The time had drifted at a rate of -0.59s/day.
Measurements:sgpmwrtipC1.a1:
  • 31.4 GHz blackbody+noise injection signal(bbn31)
  • 31.4 GHz Blackbody signal(bb31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Noise diode mount temperature(tknd)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Actual elevation angle(actel)
  • Blackbody kinetic temperature(tkbb)
  • 23.8 GHz Blackbody signal(bb23)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Ambient temperature(tkair)
  • Mixer kinetic (physical) temperature(tkxc)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • 31.4 GHz sky signal(tipsky31)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Actual Azimuth(actaz)
  • Time offset from base_time(base_time)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • 23.8 GHz sky signal(tipsky23)
  • Time offset of tweaks from base_time(time_offset)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • 23.8 GHz goodness-of-fit coefficient(r23)

sgpmwrlosC1.b1:
  • 31.4 GHz sky signal(sky31)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 31.4 GHz blackbody+noise injection signal(bbn31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • 23.8 GHz sky signal(sky23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Mean total liquid water amount along LOS path(liq)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz Blackbody signal(bb31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Blackbody kinetic temperature(tkbb)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)
  • Mean total water vapor amount along LOS path(vap)
  • Ambient temperature(tkair)
  • 23.8 GHz Blackbody signal(bb23)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
  • Noise diode mount temperature(tknd)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Temperature correction coefficient at 23.8 GHz(tc23)

sgpmwrlosC1.a1:
  • 31.4 GHz blackbody+noise injection signal(bbn31)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • 23.8 GHz sky signal(sky23)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Mean total water vapor amount along LOS path(vap)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Noise diode mount temperature(tknd)
  • Ambient temperature(tkair)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 23.8 GHz Blackbody signal(bb23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 31.4 GHz sky signal(sky31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • 31.4 GHz Blackbody signal(bb31)
  • Blackbody kinetic temperature(tkbb)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Mean total liquid water amount along LOS path(liq)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Time offset from base_time(base_time)
  • Time offset of tweaks from base_time(time_offset)


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DQRID : D010215.5
Start DateStart TimeEnd DateEnd Time
10/17/2000000001/24/20011600
Subject:
SGP/MWR/C1 - IRT failure
DataStreams:sgpmwrlosC1.a1, sgpmwrlosC1.b1
Description:
The IRT was damaged by internal moisture causing sky temperature
measurements that are negatively biased compared to those from
the AERI. IRT#0517 was returned to the manufacturer for repair
and was replaced with spare IRT#1254.
Measurements:sgpmwrlosC1.b1:
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)

sgpmwrlosC1.a1:
  • Sky/Cloud Infra-Red 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:sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgC1.c1
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:
  • Mean total liquid water amount along LOS path(liq)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean total water vapor amount along LOS path(vap)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)

sgpmwrlosC1.b1:
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Mean total liquid water amount along LOS path(liq)
  • Mean total water vapor amount along LOS path(vap)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)

sgp1mwravgC1.c1:
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean total liquid water amount along LOS path(liq)
  • Mean total water vapor amount along LOS path(vap)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)

sgpmwrlosC1.a1:
  • Mean total water vapor amount along LOS path(vap)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Mean total liquid water amount along LOS path(liq)


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DQRID : D040824.1
Start DateStart TimeEnd DateEnd Time
12/01/1999000012/21/19992359
11/10/2000000012/08/20002359
01/26/2001000003/05/20012359
12/18/2001000012/31/20012359
02/11/2002000002/28/20022359
02/19/2003000003/26/20032359
10/15/2003000011/03/20032359
Subject:
SGP/MWR/C1 - Wet window flag "on" more frequently than expected
DataStreams:sgpmwrlosC1.a1, sgpmwrlosC1.b1
Description:
The wet window flag was set "on" more frequently than expected during the time periods 
specified.  This indicates the heater has been running more than necessary.  In most 
instances the moisture sensitivity was adjusted at the end of these periods.
Measurements:sgpmwrlosC1.b1:
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Mean total water vapor amount along LOS path(vap)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Mean total liquid water amount along LOS path(liq)

sgpmwrlosC1.a1:
  • Mean total liquid water amount along LOS path(liq)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Mean total water vapor amount along LOS path(vap)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)


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