Data Quality Reports for Session: 105200 User: troyan Completed: 04/13/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
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
D990124.2SGP/SONDE - Dry bias in sonde RHsgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1,
sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00,
sgpsondeC1.a0, sgpsondeC1.a1, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00,
DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1,
DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00,
DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, sgpsondewnpnB1.a0,
sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0,
sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1,
sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0,
sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00,
sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0,
sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00,
sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0,
sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00,
sgpsondewrprC1.a0, sgpsondewrprC1.a1, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1,
DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1,
DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1,
DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1


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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DQRID : D990124.2
Start DateStart TimeEnd DateEnd Time
05/27/1992000005/31/20022359
Subject:
SGP/SONDE - Dry bias in sonde RH
DataStreams:sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1,
sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00,
sgpsondeC1.a0, sgpsondeC1.a1, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00,
DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1,
DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00,
DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, sgpsondewnpnB1.a0,
sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0,
sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1,
sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0,
sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00,
sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0,
sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00,
sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0,
sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00,
sgpsondewrprC1.a0, sgpsondewrprC1.a1, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1,
DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1,
DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1,
DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1
Description:
Vaisala has confirmed ARM findings of an apparent dry bias in the
relative humidity measured by RS-80H radiosondes.  The cause of
the dry bias is thought to be contamination of the humidity sensor
by volatile organic substances originating from some plastic parts
of the radiosonde.  The amount of contamination is a function of
the time between the date of sonde manufacture and its use.  All
RS-80H sondes manufactured before week 34 of 1998 will show this
bias.  After week 34 of 1998 Vaisala changed its packaging to
reduce, but not eliminate the contamination problem.

Starting with RS-80 radiosonde manufactured in late June 2000 Vaisala
enclosed the sensor boom in an inert plastic shield, thereby eliminating
the contamination that caused the dry bias.

Starting in May 2001 at the SGP, May 2002 at the TWP, and later 2002
at the NSA, ARM has moved to using RS-90 radiosondes.  These sondes
are not subject to the contaminatino that caused the dry bias.

Vaisala is in the process of developing an algorithm that can be 
used to estimate the correct RH from knowledge of the sonde age.
All of the ARM sounding data have sufficient metadata available
to apply the correction.

Additionally, ARM has funded a Science Team effort (Milosevich) to
develop a 'best' correction algorithm for the RS-80 radiosonde humidity
data.  When completed this algorithm will allow us to reprocess the
accumulated RS-80 data and produce a new data platform with what we
hope will be more accurate data.
Measurements:sgpsondeB4.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

DsgpsondeB5.00:
  • (Development raw data stream - documentation not supported)

sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpsondewnpnC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

DsgpsondeptuB6.00:
  • (Development raw data stream - documentation not supported)

DsgpsondenogcptucalcB1.c1:
  • (Development data stream - documentation not supported)

sgpsondewrpnB6.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

DsgpsondeptuC1.00:
  • (Development raw data stream - documentation not supported)

sgpsondewnprC1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

DsgpsondenogcptucalcB5.c1:
  • (Development data stream - documentation not supported)

DsgpsondeptucalcC1.c1:
  • (Development data stream - documentation not supported)

sgpsondewnpnB4.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondeB6.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpsondewrprB4.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

DsgpsondeptuB1.00:
  • (Development raw data stream - documentation not supported)

DsgpsondenogcptucalcC1.c1:
  • (Development data stream - documentation not supported)

sgpsondewrpnC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondewrpnB1.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewrprC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpsondewrpnB1.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondewrprB5.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondeB5.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewrprB5.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

DsgpsondeC1.00:
  • (Development raw data stream - documentation not supported)

sgpsondewrprB1.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondeB1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpsondeptuC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

DsgpsondenogcptucalcB4.c1:
  • (Development data stream - documentation not supported)

DsgpsondeB1.a0:
  • (Development data stream - documentation not supported)

DsgpsondeC1.a1:
  • (Development data stream - documentation not supported)

DsgpsondeptucalcB5.c1:
  • (Development data stream - documentation not supported)

sgpsondewrprB1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpsondewrpnC1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewrpnB1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpsondeB1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

DsgpsondeC1.a0:
  • (Development data stream - documentation not supported)

DsgpsondeB4.a1:
  • (Development data stream - documentation not supported)

DsgpsondeptuB4.00:
  • (Development raw data stream - documentation not supported)

sgpsondeB1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondewrprB5.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondeC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpsondewnpnB1.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewrpnB6.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondewrprC1.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondeC1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewrprC1.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

DsgpsondeptuB5.00:
  • (Development raw data stream - documentation not supported)

sgpsondewrpnB5.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewrprB4.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

DsgpsondeB1.a1:
  • (Development data stream - documentation not supported)

sgpsondeB5.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewnpnB6.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

DsgpsondeB5.a1:
  • (Development data stream - documentation not supported)

DsgpsondenogcwrpnB1.c1:
  • (Development data stream - documentation not supported)

sgpsondewrprB1.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondewrpnB5.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

DsgpsondeB4.a0:
  • (Development data stream - documentation not supported)

DsgpsondenogcwrpnB4.c1:
  • (Development data stream - documentation not supported)

DsgpsondeB5.a0:
  • (Development data stream - documentation not supported)

sgpsondewnpnB4.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondewnprC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondewrpnB5.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewnpnB5.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

DsgpsondeB4.00:
  • (Development raw data stream - documentation not supported)

sgpsondewrpnB6.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpsondewrprB4.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewnpnB1.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondeB4.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondeC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondewrpnB4.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

DsgpsondenogcwrpnB5.c1:
  • (Development data stream - documentation not supported)

sgpsondewnpnC1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewrpnB4.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

DsgpsondeB1.00:
  • (Development raw data stream - documentation not supported)

sgpsondeB4.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

sgpsondewnpnB6.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewrpnB4.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)

sgpsondewnpnB5.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

DsgpsondeptucalcB4.c1:
  • (Development data stream - documentation not supported)

DsgpsondenogcwrpnC1.c1:
  • (Development data stream - documentation not supported)

sgpsondeB5.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

DsgpsondeptucalcB1.c1:
  • (Development data stream - documentation not supported)


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