Data Quality Reports for Session: 103217 User: bahrmann Completed: 12/13/2006


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D030822.7NSA/MWR/C1 - min/max/delta values incorrectnsamwrlosC1.b1
D060420.8NSA/MWR/C1 - software upgrade (version 3.28)nsamwrlosC1.a1, nsamwrlosC1.b1
D990106.3NSA/MWR/C1 - Software ChangensamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1


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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DQRID : D060420.8
Start DateStart TimeEnd DateEnd Time
01/02/1998000002/03/19991200
Subject:
NSA/MWR/C1 - software upgrade (version 3.28)
DataStreams:nsamwrlosC1.a1, nsamwrlosC1.b1
Description:
The MWR operating program was upgraded to version 3.28 on 3 February 1999. This version 
includes a beam width correction as well as providing the capability to automatically level 
the elevation mirror (that is, to automatically detect and correct offsets in the 
elevation angle stepper motor position.)

The improvement in the quality of the tip curves resulting from the auto-
leveling has been dramatic: differences in the brightness temperatures at
3 airmasses (19.5 and 160.5 degrees) have been reduced from +/- 5 K to
+/- 0.5 K.  In order to take full advantage of this improvement to detect and reject 
cloudy tip curves, the minimum value of the goodness-of-fit coefficient for a valid tip curve 
has been increased from 0.995 to 0.998.
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 : D990106.3
Start DateStart TimeEnd DateEnd Time
03/19/1998005311/16/19981800
Subject:
NSA/MWR/C1 - Software Change
DataStreams:nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1
Description:
The MWR operating software was changed on 16 November 1998 to provide additional 
functionality as described below. This change affects the format of the raw and ingested data. 
   
NEW FEATURES
1. Faster sampling rate
   
Standard line-of-sight (LOS) observations can now be acquired at 15-second intervals vs. 
20-second intervals previously. (The standard LOS cycle is comprised of one sky sample per 
blackbody sample and gain update.)
   
2. More flexible sampling strategy
   
Multiple sky observations can be acquired during a LOS cycle, up to 1024 per gain update. 
This permits sky samples to be acquired at intervals of 2.67 seconds for improved 
temporal resolution of cloud liquid water variations and better coordination with the millimeter 
cloud radar during IOPs.
   
3. Separation of zenith LOS observations from TIP data
   
When the radiometer is in TIP mode, the zenith LOS observations are now extracted, the PWV 
and LWP computed and reported separately in the output file. This eliminates the periods 
of missing LOS data during calibration checks/updates.
   
4. Automatic self-calibration
   
The software now permits the calibration to be updated at specified intervals or 
continuously. In the first case, LOS mode is automatically changed to TIP mode at user-specified 
intervals or whenever clear sky conditions occur, the tip data reduced, the calibration 
updated, and the radiometer returned to LOS mode without operator intervention. In the 
second case, the radiometer is continuously is TIP mode until changed by the operator.
   
5. Graphical user display
   
The graphical display is comprised of a status display, a message display, a temperature 
plot, a plot of the retrieved PWV and LWP, and (in TIP mode) a plot of the latest tip 
curves.
Measurements:nsamwrlosC1.a1:
  • Ambient temperature(tkair)
  • Noise diode mount temperature(tknd)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)

nsamwrlosC1.b1:
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Noise diode mount temperature(tknd)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Ambient temperature(tkair)

nsamwrtipC1.a1:
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • Noise diode mount temperature(tknd)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Ambient temperature(tkair)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)


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