Data Quality Reports for Session: 123325 User: dmfoper Completed: 10/02/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D000127.1TWP/MWR/C2 - Uncertainty in clock timetwpmwrlosC2.b1, twpmwrtipC2.a1
D000609.1TWP/MWR/C2 - InstallationtwpmwrlosC2.b1, twpmwrtipC2.a1
D001004.1TWP/MWR/C2 - damaged teflon windowtwpmwrtipC2.a1
D010227.4TWP/MWR/C2 - Excessive wet_window flagstwpmwrlosC2.b1, twpmwrtipC2.a1
D070412.3TWP/MWR/C1/C2 - Sun in the field of viewtwpmwrlosC1.b1, twpmwrlosC2.b1, twpmwrtipC1.a1, twpmwrtipC2.a1
D090114.4TWP/MWR/C1 - Ambient temperature data missingtwpmwrlosC1.b1, twpmwrtipC1.a1


DQRID : D000127.1
Start DateStart TimeEnd DateEnd Time
11/06/1998000007/30/19992359
Subject:
TWP/MWR/C2 - Uncertainty in clock time
DataStreams:twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
At ARCS2, the MWR computer clock was not being updated because no NTP time service 
software was installed on the computer. During Nauru99, on 6/24/99, the clock was found to be 3 
minutes and 17 seconds fast. 

Assuming that the time was properly set at installation on 10/26/98 (which is not 
indicated in the installation report) and never reset until 6/24/99, the rate of time drift on 
the computer was about +0.8 seconds per day. However, if the time was not reset since 
integration at AIS on 1/14/98 (which is recorded in my integration notes), then the rate of 
drift is about +0.4 seconds per day.

The computer was replaced and time service started on 7/30/99.
Measurements:twpmwrlosC2.b1:
  • 31.4 GHz sky signal(sky31)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Blackbody kinetic temperature(tkbb)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • 31.4 GHz blackbody(bb31)
  • MWR column precipitable water vapor(vap)
  • 23.8 GHz sky signal(sky23)
  • Ambient temperature(tkair)
  • IR Brightness Temperature(ir_temp)
  • base time(base_time)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Averaged total liquid water along LOS path(liq)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • 23.8 GHz Blackbody signal(bb23)
  • (tknd)
  • Actual Azimuth(actaz)
  • Time offset of tweaks from base_time(time_offset)
  • Actual elevation angle(actel)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Temperature correction coefficient at 31.4 GHz(tc31)
twpmwrtipC2.a1:
  • 31.4 GHz sky signal(tipsky31)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • Actual Azimuth(actaz)
  • 23.8 GHz sky signal(tipsky23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • 31.4 GHz blackbody(bb31)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Ambient temperature(tkair)
  • (tknd)
  • base time(base_time)
  • Blackbody kinetic temperature(tkbb)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • Time offset of tweaks from base_time(time_offset)
  • Actual elevation angle(actel)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • 23.8 GHz Blackbody signal(bb23)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Temperature correction coefficient at 31.4 GHz(tc31)

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DQRID : D000609.1
Start DateStart TimeEnd DateEnd Time
11/06/1998214111/19/19982359
Subject:
TWP/MWR/C2 - Installation
DataStreams:twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
The Nauru ARCS was installed during the period September-November
1998.  Data were being collected by the end of October, but for the
first several weeks of November, the site was undergoing considerable
change, so data from that period should be used with caution.  The
official site dedication occured on November 20.  Most on-site
activity ended following the dedication so we will consider November
20 to be the beginning of the Nauru operations.  The last members of
the installation team left Nauru on November 24.
Measurements:twpmwrlosC2.b1:
  • 31.4 GHz sky signal(sky31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Mixer kinetic (physical) temperature(tkxc)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Blackbody kinetic temperature(tkbb)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 23.8 GHz Blackbody signal(bb23)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • 31.4 GHz blackbody(bb31)
  • MWR column precipitable water vapor(vap)
  • 23.8 GHz sky signal(sky23)
  • (tknd)
  • Actual Azimuth(actaz)
  • Ambient temperature(tkair)
  • IR Brightness Temperature(ir_temp)
  • Actual elevation angle(actel)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Averaged total liquid water along LOS path(liq)
twpmwrtipC2.a1:
  • 31.4 GHz sky signal(tipsky31)
  • (tknd)
  • Blackbody kinetic temperature(tkbb)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • Actual Azimuth(actaz)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Actual elevation angle(actel)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • 23.8 GHz Blackbody signal(bb23)
  • 23.8 GHz sky signal(tipsky23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • 31.4 GHz blackbody(bb31)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Mixer kinetic (physical) temperature(tkxc)
  • Ambient temperature(tkair)

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DQRID : D001004.1
Start DateStart TimeEnd DateEnd Time
04/10/2000030006/27/20002200
Subject:
TWP/MWR/C2 - damaged teflon window
DataStreams:twpmwrtipC2.a1
Description:
From the RESET11N daily report for 11Apr00:
 At around 15:00 (4/10/00) it was noticed that the 50hz outside power breaker was
 tripped. When it was reset to get the WSI running the MWR heater smoked.
 The heater and cable burned out. The Teflon window sustained damage and
 needs replacing. 

From the RESET11N daily report for 27Jun00:
 22:00GMT(26JUN) - Replaced the MWR window. DM
Measurements:twpmwrtipC2.a1:
  • 31.4 GHz sky signal(tipsky31)
  • 23.8 GHz sky signal(tipsky23)

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DQRID : D010227.4
Start DateStart TimeEnd DateEnd Time
01/16/1999090003/08/19992100
11/16/1999090002/09/20002100
12/07/2000000012/17/20002359
Subject:
TWP/MWR/C2 - Excessive wet_window flags
DataStreams:twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
The wet_window flag is set high more than expected from the measured value of liquid water 
path. This may be caused by dew or, if the heater sensivity is slightly misadjusted, by 
the diurnal variation in ambient temperature.

The "wet_window" flag is an indicator of moisture on the MWR window which invalidates the 
measurements of precipitable water vapor and liquid water path. Sometimes this flag can 
be incorrectly set high or low if the heater sensivity is slightly misadjusted. The heater 
adjustment is a resistive device that is dependent on ambient temperature. Another 
indicator of moisture on the window is unreasonably high ( > 3*liquid_retrieval_rms_accuracy ) 
values of "liq".
Measurements:twpmwrlosC2.b1:
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
twpmwrtipC2.a1:
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)

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DQRID : D070412.3
Start DateStart TimeEnd DateEnd Time
03/07/2007000004/02/20072359
03/01/2008000004/02/20082359
09/10/2008000010/12/20080000
03/01/2009000004/02/20092359
Subject:
TWP/MWR/C1/C2 - Sun in the field of view
DataStreams:twpmwrlosC1.b1, twpmwrlosC2.b1, twpmwrtipC1.a1, twpmwrtipC2.a1
Description:
Every day between around noon local time (usually between 1 and 2 AM UTC time) there is an 
increase in the brightness temperatures due to the sun in the field of vie of the 
radiometer.
Measurements:twpmwrlosC2.b1:
  • 31.4 GHz sky signal(sky31)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • MWR column precipitable water vapor(vap)
  • 23.8 GHz sky signal(sky23)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Averaged total liquid water along LOS path(liq)
twpmwrlosC1.b1:
  • MWR column precipitable water vapor(vap)
  • 31.4 GHz sky signal(sky31)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Averaged total liquid water along LOS path(liq)
  • 23.8 GHz sky signal(sky23)
twpmwrtipC1.a1:
  • 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
  • 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
twpmwrtipC2.a1:
  • 31.4 GHz sky signal(tipsky31)
  • 23.8 GHz sky signal(tipsky23)

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DQRID : D090114.4
Start DateStart TimeEnd DateEnd Time
12/03/2008190002/06/20090530
Subject:
TWP/MWR/C1 - Ambient temperature data missing
DataStreams:twpmwrlosC1.b1, twpmwrtipC1.a1
Description:
The ambient temperature readings (tkair) suddenly failed. The sensor was replaced on Feb 
6.
Measurements:twpmwrlosC1.b1:
  • Ambient temperature(tkair)
twpmwrtipC1.a1:
  • Ambient temperature(tkair)

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