Data Quality Reports for Session: 127127 User: martin1ste Completed: 04/06/2010

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060928.3SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdrysgpsondewnpnC1.b1
D081013.5SGP/MWR/C1 - Increased noise in 31.4 GHz channelsgpmwrlosC1.b1, sgpmwrtipC1.a1


DQRID : D060928.3
Start DateStart TimeEnd DateEnd Time
09/28/2006172812/31/99992359
Subject:
SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry
DataStreams:sgpsondewnpnC1.b1
Description:
The output precision of the following variables was increased 20060928

alt  changed from 1m to 0.1m
dp   changed from 0.1degC to 0.01degC
pres changed from 0.1 hPa to 0.01 hPa
RH   changed from 1%RH to 0.01%RH
tdry changed from .1degC to 0.01degC

Note that the increase in precision does not necessarily imply an increase in accuracy.  
Users are cautioned to continue to use their best scientific judgement when using these or 
any other data.
Measurements:sgpsondewnpnC1.b1:
  • Dummy altitude for Zeb(alt)
  • Dry bulb temperature(tdry)
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)
  • Retrieved pressure profile(pres)

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DQRID : D081013.5
Start DateStart TimeEnd DateEnd Time
05/01/2008000011/30/20082300
Subject:
SGP/MWR/C1 - Increased noise in 31.4 GHz channel
DataStreams:sgpmwrlosC1.b1, sgpmwrtipC1.a1
Description:
The 31.4 GHz channel has been showing an increased level of noise which results in 
increased noise in the LWP retrievals. The instrument is tipping and all other parameters seem 
to be in the range. The elevate noise started in May, but it seems to have become slightly 
worse after summer. After November the noise level seems to have gone back to normal.
Measurements:sgpmwrtipC1.a1:
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
sgpmwrlosC1.b1:
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Averaged total liquid water along LOS path(liq)

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