Data Quality Reports for Session: 134476 User: zzwang Completed: 04/14/2011

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D080828.1HFE/MWR/M1 - Insufficient calibration stabilityhfemwrlosM1.b1, hfemwrtipM1.a1
D090203.2HFE/MWRHF/M1 - 150-GHz data drop outhfemwrhfM1.b1
D090213.2HFE/MWRHF/M1 - Frosting/CondensationhfemwrhfM1.b1
D090213.3HFE/MWRHF/M1 - Calibration updateshfemwrhfM1.b1
D090213.4HFE/MWRHF/M1 - Rain sensor failurehfemwrhfM1.b1
D090310.2HFE/MWRHF/M1 - Elevated noise in 150 GHz datahfemwrhfM1.b1
D090311.3HFE/MWR/M1 - Missing datahfemwrlosM1.b1, hfemwrtipM1.a1


DQRID : D080828.1
Start DateStart TimeEnd DateEnd Time
09/06/2008000009/26/20082359
10/01/2008000010/06/20081500
10/16/2008020110/16/20082359
10/20/2008000010/23/20082359
Subject:
HFE/MWR/M1 - Insufficient calibration stability
DataStreams:hfemwrlosM1.b1, hfemwrtipM1.a1
Description:
The noise diode temperature suddenly jumped to > 60 C after a power outage. Following 
additional power problems the noise diode injection temperature drifted fast and the 
radiometer was not able to calibrate properly.

Data during the indicated time periods are poorly calibrated and sometimes erratic. Users 
should be aware that the accuracy of the measurements is dramatically degraded. 

Users can use the microwave profiler (MWRP) data to supplement the MWR data.
Measurements:hfemwrlosM1.b1:
  • tc23
  • Total water vapor along LOS path(vap)
  • tnd31
  • tc31
  • tknd
  • tnd_nom31
  • tkxc
  • 31.4 GHz sky brightness temperature(tbsky31)
  • Total liquid water along LOS path(liq)
  • tnd23
  • 23.8 GHz sky brightness temperature(tbsky23)
  • tnd_nom23
hfemwrtipM1.a1:
  • tbsky31tip
  • tc31
  • tnd23
  • tnd_nom23
  • tnd23I
  • tnd31I
  • tc23
  • tbsky23tip
  • tkxc
  • tnd_nom31
  • tknd
  • tnd31
  • liqtip
  • vaptip

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DQRID : D090203.2
Start DateStart TimeEnd DateEnd Time
08/04/2008122910/02/20082340
Subject:
HFE/MWRHF/M1 - 150-GHz data drop out
DataStreams:hfemwrhfM1.b1
Description:
The sky brightness temperature at 150 GHz (tbsky150) dropped to zero at 12:29 GMT on 
20080804 and stayed flat lined until 23:40 GMT on 20081002.
Measurements:hfemwrhfM1.b1:
  • Sky brightness temperature (150 GHz)(tbsky150)

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DQRID : D090213.2
Start DateStart TimeEnd DateEnd Time
05/09/2008000006/04/20080310
08/18/2008000008/28/20082359
Subject:
HFE/MWRHF/M1 - Frosting/Condensation
DataStreams:hfemwrhfM1.b1
Description:
The heater module was installed on 6/4/2008. Before this time there is condensation on the 
window during night time and early morning. On 8/18 the heater appears to have failed 
and nighttime condensation re-occurred on the radome during conditions of high humidity.

Users can identify the segments affected by observing a smooth steady increase in the 
brightness temperature (BT). BT values can increase to more than 250 K and then smoothly 
decrease. The RH during these events is usually above 70%. Users should disregard data 
affected by condensation.
Measurements:hfemwrhfM1.b1:
  • Sky brightness temperature (90 GHz)(tbsky90)
  • Sky brightness temperature (150 GHz)(tbsky150)

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DQRID : D090213.3
Start DateStart TimeEnd DateEnd Time
05/09/2008050012/28/20082359
Subject:
HFE/MWRHF/M1 - Calibration updates
DataStreams:hfemwrhfM1.b1
Description:
The MWRHF calibration algorithm updates the calibration parameters every time a new 
successful tip curve is acquired. 

This results in small jumps (1-2 K) in the brightness temperatures each time calibration 
is updated. During times of frequent calibrations the data appear discontinuous with short 
data segments interrupted by small jumps.
Measurements:hfemwrhfM1.b1:
  • Sky brightness temperature (90 GHz)(tbsky90)
  • Sky brightness temperature (150 GHz)(tbsky150)

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DQRID : D090213.4
Start DateStart TimeEnd DateEnd Time
05/28/2008000008/04/20080300
Subject:
HFE/MWRHF/M1 - Rain sensor failure
DataStreams:hfemwrhfM1.b1
Description:
The rain sensor failed and the rain flag was always on.  When the rain flag is on the 
radiometer does not perform tip curves. The rain sensor was replaced 8/4.
Measurements:hfemwrhfM1.b1:
  • Rain flag(rain_flag)

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DQRID : D090310.2
Start DateStart TimeEnd DateEnd Time
10/02/2008234112/28/20082359
Subject:
HFE/MWRHF/M1 - Elevated noise in 150 GHz data
DataStreams:hfemwrhfM1.b1
Description:
The noise level of the 150 GHz channel was about 4 times higher than expected, likely due 
to failure of the noise diode.  Disregard the 150 GHz data.
Measurements:hfemwrhfM1.b1:
  • Sky brightness temperature (150 GHz)(tbsky150)

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DQRID : D090311.3
Start DateStart TimeEnd DateEnd Time
10/06/2008150110/16/20080200
10/17/2008000010/19/20082359
10/24/2008000010/26/20082359
11/09/2008000012/28/20080000
Subject:
HFE/MWR/M1 - Missing data
DataStreams:hfemwrlosM1.b1, hfemwrtipM1.a1
Description:
Data are missing and unrecoverable.
Measurements:hfemwrlosM1.b1:
  • bb23
  • tnd31
  • time_offset
  • tkxc
  • alt
  • 31.4 GHz sky brightness temperature(tbsky31)
  • bb31
  • tnd23
  • 23.8 GHz sky brightness temperature(tbsky23)
  • wet_window
  • tnd_nom23
  • tc23
  • tkbb
  • sky23
  • bbn23
  • Total water vapor along LOS path(vap)
  • tc31
  • tknd
  • tkair
  • tnd_nom31
  • bbn31
  • lat
  • Total liquid water along LOS path(liq)
  • base_time
  • lon
  • sky31
  • time
  • Temperature, Sky Infra-Red(sky_ir_temp)
hfemwrtipM1.a1:
  • tipsky31
  • bb23
  • base_time
  • tc31
  • tnd31I
  • time_offset
  • lon
  • bb31
  • tipsky23
  • tbsky23tip
  • tc23
  • tkair
  • wet_window
  • tbsky31tip
  • r31
  • tnd23
  • tnd_nom23
  • lat
  • time
  • tnd23I
  • actaz
  • bbn31
  • alt
  • r23
  • tnd_nom31
  • tkxc
  • actel
  • tknd
  • tkbb
  • tnd31
  • liqtip
  • vaptip
  • bbn23

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