DQRs for Session: 131631 User:gongweiCompleted: 11-16-2010

Data Quality Reports for Session: 131631 User: gongwei Completed: 11/16/2010

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D000308.1	SGP/SONDE - Questionable absolute pressures	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D000308.2	SGP/SONDE - Questionable absolute pressures	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D020611.2	SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020626.34	SGP/SONDE/C1 - Incorrect Surface Pressure	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020626.35	SGP/SONDE/C1 - Bad Temperature Sensor	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020703.1	SGP/SONDE/C1 - Temperature sensor failure	sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D021117.1	SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D021121.1	SGP/SONDE/C1 - Contaminated by interference	sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D021123.2	SGP/SONDE/C1 - Interference CF sounding 20021120:0225	sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D021201.1	SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D980126.1	Incorrect radiosonde serial numbers	sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D980507.4	Incorrect surface pressure	sgpsondewrpnC1.a1
D980511.2	Incorrect surface pressure	sgpsondewrpnC1.a1
D980917.1	Incorrect surface readings	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D980917.2	Incorrect surface RH	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D990124.2	SGP/SONDE - Dry bias in sonde RH	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

DQRID : D000308.1

Start Date	Start Time	End Date	End Time
03/03/2000	2328	03/04/2000	0051

Subject:	SGP/SONDE - Questionable absolute pressures
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	The sonde surface pressure reading was considerably higher than the corresponding THWAPS pressure (988.0 hPa vs 982.3 hPa). The sonde readings are consistent during the sounding, however, suggesting that this is not a case of a pressure jump at launch but one of sensor offset. This problem will only affect those who use the absolute pressure values. The file altitudes, which are based on the relative pressure changes from the surface, should be fine.
Measurements:	sgpsondewrpnC1.00: Raw data stream - documentation not supported sgpsondewrpnC1.a1: Pressure, atmospheric, constant value of model level, RUC model output(pres) sgpsondewrpnC1.a0: Pressure, atmospheric, constant value of model level, RUC model output(pres)

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DQRID : D000308.2

Start Date	Start Time	End Date	End Time
03/04/2000	0229	03/04/2000	0359

Subject:	SGP/SONDE - Questionable absolute pressures
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	The sonde surface pressure reading was considerably higher than the corresponding THWAPS pressure (992.9 hPa vs 983.0 hPa). The sonde readings are consistent during the sounding, however, suggesting that this is not a case of a pressure jump at launch but one of sensor offset. This problem will only affect those who use the absolute pressure values. The file altitudes, which are based on the relative pressure changes from the surface, should be fine.
Measurements:	sgpsondewrpnC1.00: Raw data stream - documentation not supported sgpsondewrpnC1.a1: Pressure, atmospheric, constant value of model level, RUC model output(pres) sgpsondewrpnC1.a0: Pressure, atmospheric, constant value of model level, RUC model output(pres)

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DQRID : D020611.2

Start Date	Start Time	End Date	End Time
06/09/2002	0229	06/09/2002	0236

Subject:	SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc
DataStreams:	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:	The temperature and RH for this sounding look bad, either because of interference from another sonde or because the temperature sensor was broken on launch. The sounding terminated early in any event.
Measurements:	sgpsondewnpnC1.b1: alt Dry Bulb Temperature(tdry) Dewpoint Temperature(dp) Humidity, relative(rh) asc sgpsondewnpnC1.a1: Dry Bulb Temperature(tdry) Dewpoint Temperature(dp) alt Humidity, relative(rh) asc

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DQRID : D020626.34

Start Date	Start Time	End Date	End Time
06/17/2002	1128	06/17/2002	1313

Subject:	SGP/SONDE/C1 - Incorrect Surface Pressure
DataStreams:	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:	It appears that the operator made a typographical error when entering the surface pressure. The file has 987.0 hPa and it probably should be 978.0 which would be consistent with the first sample provided by the radiosonde (977.3 hPa), the surface pressures recorded for the adjacent soundings, and the THWAPS pressure. Because the sounding altitude is calculated assuming the surface pressure is correct, the altitude values for the entire flight and the ascent rate values for the first 30 seconds of the sounding will be incorrect.
Measurements:	sgpsondewnpnC1.b1: alt asc sgpsondewnpnC1.a1: alt asc

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DQRID : D020626.35

Start Date	Start Time	End Date	End Time
06/19/2002	2329	06/20/2002	0036

Subject:	SGP/SONDE/C1 - Bad Temperature Sensor
DataStreams:	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:	It appears that the temperature sensor broke shortly after launch. As a result, the temperature and dewpoint values are incorrect.
Measurements:	sgpsondewnpnC1.b1: Dry Bulb Temperature(tdry) Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewnpnC1.a1: Dry Bulb Temperature(tdry) Dewpoint Temperature(dp) Humidity, relative(rh)

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DQRID : D020703.1

Start Date	Start Time	End Date	End Time
06/27/2002	1728	06/27/2002	1908

Subject:	SGP/SONDE/C1 - Temperature sensor failure
DataStreams:	sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:	Temperature sensor broke at launch. All temperature-related variables are incorrect.
Measurements:	sgpqmemwrcolC1.c1: Water vapor, total integrated from radiosonde(integ_vap_sonde) integ_vap_sonde_direct sgpsondewnpnC1.b1: Dry Bulb Temperature(tdry) Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewnpnC1.a1: Dry Bulb Temperature(tdry) Dewpoint Temperature(dp) Humidity, relative(rh)

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DQRID : D021117.1

Start Date	Start Time	End Date	End Time
11/13/2002	2044	11/13/2002	2205

Subject:	SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044
DataStreams:	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:	The RH data in this sounding is erratic between 2km and 10 km, oscillating between reasonable values (~40%RH) and zero. I certainly doubt that this is a real, heretofore unreported, atmospheric phenomenon so I have to conclude that something is probably wrong with the sensor. I have not seen this behavior before. One would have to look at the absolutely raw RH data to explore further.
Measurements:	sgpsondewnpnC1.b1: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewnpnC1.a1: Dewpoint Temperature(dp) Humidity, relative(rh)

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DQRID : D021121.1

Start Date	Start Time	End Date	End Time
11/19/2002	1423	11/19/2002	1623
11/19/2002	1726	11/19/2002	1917
11/19/2002	2026	11/19/2002	2204

Subject:	SGP/SONDE/C1 - Contaminated by interference
DataStreams:	sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:	These three soundings are contaminated by interference from another radiosonde. It is not clear why; this doesn't usually happen at the CF where the operators are very experienced and frequency separation is not usually a problem.
Measurements:	sgpsondeC1.00: Raw data stream - documentation not supported sgpsondewnpnC1.b1: Dewpoint Temperature(dp) asc Pressure, atmospheric, constant value of model level, RUC model output(pres) Eastward Wind Component(u_wind) Dry Bulb Temperature(tdry) lon Mean Wind Speed(wspd) base_time Wind Direction(deg) Northward Wind Component(v_wind) time_offset lat alt wstat Humidity, relative(rh) sgpsondewnpnC1.a1: lon Wind Direction(deg) Dewpoint Temperature(dp) wstat Humidity, relative(rh) Mean Wind Speed(wspd) asc Northward Wind Component(v_wind) alt lat base_time Eastward Wind Component(u_wind) time_offset Dry Bulb Temperature(tdry) Pressure, atmospheric, constant value of model level, RUC model output(pres)

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DQRID : D021123.2

Start Date	Start Time	End Date	End Time
11/20/2002	0225	11/20/2002	0412

Subject:	SGP/SONDE/C1 - Interference CF sounding 20021120:0225
DataStreams:	sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:	Like several soundings on 11/19, this sounding was affected by interference from another radiosonde.
Measurements:	sgpsondeC1.00: Raw data stream - documentation not supported sgpsondewnpnC1.b1: Dewpoint Temperature(dp) asc Pressure, atmospheric, constant value of model level, RUC model output(pres) Eastward Wind Component(u_wind) Dry Bulb Temperature(tdry) lon Mean Wind Speed(wspd) base_time Wind Direction(deg) Northward Wind Component(v_wind) time_offset lat alt wstat Humidity, relative(rh) sgpsondewnpnC1.a1: lon Wind Direction(deg) Dewpoint Temperature(dp) wstat Humidity, relative(rh) Mean Wind Speed(wspd) asc Northward Wind Component(v_wind) alt lat base_time Eastward Wind Component(u_wind) time_offset Dry Bulb Temperature(tdry) Pressure, atmospheric, constant value of model level, RUC model output(pres)

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DQRID : D021201.1

Start Date	Start Time	End Date	End Time
11/21/2002	1130	11/21/2002	1311

Subject:	SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130
DataStreams:	sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:	The RH samples in this sounding oscillate between reasonable values (60-80%) and zero. This may be a problem with the RH sensor or the software that alternates between the heated and non-heated RH elements. In either case, the reported values are questionable. More investigation of the raw binary data would be required to diagnose further.
Measurements:	sgpsondewnpnC1.b1: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewnpnC1.a1: Dewpoint Temperature(dp) Humidity, relative(rh)

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DQRID : D980126.1

Start Date	Start Time	End Date	End Time
01/01/1998	0000	12/31/1999	2359

Subject:	Incorrect radiosonde serial numbers
DataStreams:	sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	Radiosondes manufactured at Vaisala's Woburn, MA factory during the first of January 1998 have incorrect serial numbers. Instead of being numbered 8012XXXXX these sondes are numbered 7012XXXXX. Vaisala has been informed of this, has confirmed the problem, and has corrected their numbering for all subsequent sondes. 163 incorrectly numbered sondes were shipped to ARM on 1/9/98. Some have been used at the CF since 1/19/98:1430.
Measurements:	sgpsondewrpnB4.a0: lon Humidity, relative(rh) Mean Wind Speed(wspd) Wind Direction(deg) Dry Bulb Temperature(tdry) base_time time_offset asc Pressure, atmospheric, constant value of model level, RUC model output(pres) Dewpoint Temperature(dp) wstat lat alt sgpsondewrpnB5.a0: wstat Humidity, relative(rh) Pressure, atmospheric, constant value of model level, RUC model output(pres) Wind Direction(deg) lon alt asc time_offset Mean Wind Speed(wspd) base_time Dewpoint Temperature(dp) lat Dry Bulb Temperature(tdry) sgpsondewrpnB5.a1: Dry Bulb Temperature(tdry) time_offset wstat Dewpoint Temperature(dp) alt Pressure, atmospheric, constant value of model level, RUC model output(pres) lat Humidity, relative(rh) asc base_time Eastward Wind Component(u_wind) Wind Direction(deg) lon Northward Wind Component(v_wind) Mean Wind Speed(wspd) sgpsondewrpnB4.a1: asc Dewpoint Temperature(dp) lon Northward Wind Component(v_wind) time_offset Eastward Wind Component(u_wind) Humidity, relative(rh) Dry Bulb Temperature(tdry) base_time alt wstat Pressure, atmospheric, constant value of model level, RUC model output(pres) lat Mean Wind Speed(wspd) Wind Direction(deg) sgpsondewrpnB1.a1: Pressure, atmospheric, constant value of model level, RUC model output(pres) Northward Wind Component(v_wind) lat asc Wind Direction(deg) lon Dry Bulb Temperature(tdry) wstat Humidity, relative(rh) Eastward Wind Component(u_wind) alt base_time Mean Wind Speed(wspd) Dewpoint Temperature(dp) time_offset sgpsondewrpnB1.a0: alt wstat asc Humidity, relative(rh) lon lat base_time Mean Wind Speed(wspd) time_offset Dewpoint Temperature(dp) Wind Direction(deg) Pressure, atmospheric, constant value of model level, RUC model output(pres) Dry Bulb Temperature(tdry) sgpsondewrpnB6.a0: base_time wstat asc Dry Bulb Temperature(tdry) lat Dewpoint Temperature(dp) Wind Direction(deg) Pressure, atmospheric, constant value of model level, RUC model output(pres) time_offset Humidity, relative(rh) lon alt Mean Wind Speed(wspd) sgpsondewrpnC1.a1: Eastward Wind Component(u_wind) alt Mean Wind Speed(wspd) Wind Direction(deg) Pressure, atmospheric, constant value of model level, RUC model output(pres) lat Northward Wind Component(v_wind) time_offset Dewpoint Temperature(dp) lon base_time Humidity, relative(rh) asc Dry Bulb Temperature(tdry) wstat sgpsondewrpnC1.a0: Pressure, atmospheric, constant value of model level, RUC model output(pres) Humidity, relative(rh) alt lat lon base_time asc Dewpoint Temperature(dp) wstat Dry Bulb Temperature(tdry) Mean Wind Speed(wspd) time_offset Wind Direction(deg) sgpsondewrpnB6.a1: Pressure, atmospheric, constant value of model level, RUC model output(pres) Mean Wind Speed(wspd) Eastward Wind Component(u_wind) time_offset lat Humidity, relative(rh) Dewpoint Temperature(dp) Dry Bulb Temperature(tdry) base_time Northward Wind Component(v_wind) wstat lon asc Wind Direction(deg) alt

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DQRID : D980507.4

Start Date	Start Time	End Date	End Time
05/06/1998	0832	05/06/1998	0832

Subject:	Incorrect surface pressure
DataStreams:	sgpsondewrpnC1.a1
Description:	The operator transposed the digits of the surface pressure entering 976.3 instead of 967.3. The ops log shows 967.3 for the sonde and 968.3 for the THWAPS. Analysis of the absolutely raw sonde data shows 968.0 at the system-identified launch time. Note that because the output pressure data are smoothed, under the assumption that the surface data value is true, the first value reported by the sonde after launch 970.4 also is incorrect. The raw value corresponding to the sample after launch is 966.6. The absolute pressure values will be incorrect for the first few samples of the sounding, as will be the ascent rates for the first 30 seconds. The absolute altitude values also will be in error.
Measurements:	sgpsondewrpnC1.a1: Dewpoint Temperature(dp) Mean Wind Speed(wspd) Pressure, atmospheric, constant value of model level, RUC model output(pres) time_offset lat Humidity, relative(rh) Northward Wind Component(v_wind) asc Eastward Wind Component(u_wind) lon Wind Direction(deg) wstat base_time alt Dry Bulb Temperature(tdry)

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DQRID : D980511.2

Start Date	Start Time	End Date	End Time
05/09/1998	1431	05/09/1998	1431

Subject:	Incorrect surface pressure
DataStreams:	sgpsondewrpnC1.a1
Description:	The operator entered 960.2 for the surface pressure in both the log and the system. The first reading from the sonde is 950.9. Examination of the absolutely raw data shows that the sonde pressure before launch was 952.3. The THWAPS reading was 964.2. From the raw data it appears that either the system was not reset before this sounding or that a second sonde was started without resetting the system. The sonde pressure may be low in absolute terms or the operator may have mis-entered the actual sonde reading. In either case the absolute altitude will be wrong in this sounding and the ascent rates will be incorrect for the first 30 seconds.
Measurements:	sgpsondewrpnC1.a1: Dewpoint Temperature(dp) Mean Wind Speed(wspd) Pressure, atmospheric, constant value of model level, RUC model output(pres) time_offset lat Humidity, relative(rh) Northward Wind Component(v_wind) asc Eastward Wind Component(u_wind) lon Wind Direction(deg) wstat base_time alt Dry Bulb Temperature(tdry)

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DQRID : D980917.1

Start Date	Start Time	End Date	End Time
05/09/1998	2029	05/09/1998	2029

Subject:	Incorrect surface readings
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	It appears that the operator entered an incorrect set of surface data for the subject sounding. The sounding has surface PTU as 975.6 hPa, 20.0 degC, and 93% RH - the corresponding THWAPS readings are 969.7 hPa, 19.9 degC, and 72.1 %RH. The OMIS log for the subject souding shows sonde surface values of 969.2 hPa, 17.6 degC, and 70% RH.
Measurements:	sgpsondewrpnC1.00: Raw data stream - documentation not supported sgpsondewrpnC1.a1: Pressure, atmospheric, constant value of model level, RUC model output(pres) time_offset lat Humidity, relative(rh) Northward Wind Component(v_wind) asc Eastward Wind Component(u_wind) alt Dry Bulb Temperature(tdry) Dewpoint Temperature(dp) Mean Wind Speed(wspd) lon Wind Direction(deg) wstat base_time sgpsondewrpnC1.a0: base_time alt Pressure, atmospheric, constant value of model level, RUC model output(pres) asc Wind Direction(deg) Dewpoint Temperature(dp) lat Dry Bulb Temperature(tdry) wstat Humidity, relative(rh) Mean Wind Speed(wspd) lon time_offset

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DQRID : D980917.2

Start Date	Start Time	End Date	End Time
05/07/1998	2329	05/07/1998	2329

Subject:	Incorrect surface RH
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	Because of what appears to be a typographical error, the operator entered 5% RH when the surface RH was 54% RH. The corresponding THWAPS reading is 50.1% RH and the OMIS log shows 54%RH.
Measurements:	sgpsondewrpnC1.00: Raw data stream - documentation not supported sgpsondewrpnC1.a1: Pressure, atmospheric, constant value of model level, RUC model output(pres) time_offset lat Humidity, relative(rh) Northward Wind Component(v_wind) asc Eastward Wind Component(u_wind) alt Dry Bulb Temperature(tdry) Dewpoint Temperature(dp) Mean Wind Speed(wspd) lon Wind Direction(deg) wstat base_time sgpsondewrpnC1.a0: base_time alt Pressure, atmospheric, constant value of model level, RUC model output(pres) asc Wind Direction(deg) Dewpoint Temperature(dp) lat Dry Bulb Temperature(tdry) wstat Humidity, relative(rh) Mean Wind Speed(wspd) lon time_offset

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DQRID : D990124.2

Start Date	Start Time	End Date	End Time
05/27/1992	0000	05/31/2002	2359

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:	sgpsondeptuC1.00: Raw data stream - documentation not supported sgpsondeB4.a1: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondeB4.a0: Humidity, relative(rh) Dewpoint Temperature(dp) DsgpsondeptuB4.00: Development raw data stream - documentation not supported sgpsondewrprB1.00: Raw data stream - documentation not supported DsgpsondeC1.a1: Development data stream - documentation not supported DsgpsondeB5.a0: Development data stream - documentation not supported DsgpsondeC1.a0: Development data stream - documentation not supported sgpsondewrpnC1.a1: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewnprC1.a1: Dewpoint Temperature(dp) Humidity, relative(rh) DsgpsondenogcptucalcC1.c1: Development data stream - documentation not supported sgpsondewrpnB5.00: Raw data stream - documentation not supported sgpsondewrpnB4.a0: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondewnpnB1.a0: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewnpnB1.a1: Humidity, relative(rh) Dewpoint Temperature(dp) DsgpsondeB5.a1: Development data stream - documentation not supported sgpsondewrprB4.a1: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewrpnB4.a1: Dewpoint Temperature(dp) Humidity, relative(rh) DsgpsondeB4.a0: Development data stream - documentation not supported sgpsondewrpnB6.00: Raw data stream - documentation not supported DsgpsondeB4.a1: Development data stream - documentation not supported sgpsondewrprB4.a0: Humidity, relative(rh) Dewpoint Temperature(dp) DsgpsondeptuB6.00: Development raw data stream - documentation not supported sgpsondewnpnC1.a0: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewrpnB6.a0: Dewpoint Temperature(dp) Humidity, relative(rh) DsgpsondeptuB5.00: Development raw data stream - documentation not supported sgpsondewnpnC1.a1: Humidity, relative(rh) Dewpoint Temperature(dp) DsgpsondenogcwrpnB4.c1: Development data stream - documentation not supported DsgpsondeB4.00: Development raw data stream - documentation not supported sgpsondewrpnB6.a1: Humidity, relative(rh) Dewpoint Temperature(dp) DsgpsondenogcptucalcB4.c1: Development data stream - documentation not supported DsgpsondeC1.00: Development raw data stream - documentation not supported DsgpsondeptuC1.00: Development raw data stream - documentation not supported DsgpsondeptucalcB1.c1: Development data stream - documentation not supported DsgpsondeptucalcB5.c1: Development data stream - documentation not supported sgpsondewrpnB1.00: Raw data stream - documentation not supported sgpsondewrpnB1.a1: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondewrpnB1.a0: Humidity, relative(rh) Dewpoint Temperature(dp) DsgpsondeptuB1.00: Development raw data stream - documentation not supported DsgpsondeB1.00: Development raw data stream - documentation not supported DsgpsondeptucalcB4.c1: Development data stream - documentation not supported DsgpsondenogcwrpnB5.c1: Development data stream - documentation not supported sgpsondewrpnB5.a0: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondewrpnB5.a1: Dewpoint Temperature(dp) Humidity, relative(rh) DsgpsondenogcptucalcB1.c1: Development data stream - documentation not supported sgpsondeC1.00: Raw data stream - documentation not supported sgpsondewrprB4.00: Raw data stream - documentation not supported sgpsondeB4.00: Raw data stream - documentation not supported sgpsondewrprB1.a0: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondewrprC1.00: Raw data stream - documentation not supported sgpsondewrprB1.a1: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondewnpnB5.a0: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondeB1.a0: Humidity, relative(rh) Dewpoint Temperature(dp) DsgpsondeB5.00: Development raw data stream - documentation not supported sgpsondewnpnB5.a1: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondeB1.a1: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewnpnB4.a1: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondewnpnB6.a0: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewnpnB6.a1: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewnpnB4.a0: Dewpoint Temperature(dp) Humidity, relative(rh) DsgpsondenogcwrpnB1.c1: Development data stream - documentation not supported sgpsondeB5.00: Raw data stream - documentation not supported sgpsondeB6.00: Raw data stream - documentation not supported DsgpsondenogcptucalcB5.c1: Development data stream - documentation not supported sgpsondewrprB5.00: Raw data stream - documentation not supported DsgpsondeptucalcC1.c1: Development data stream - documentation not supported DsgpsondenogcwrpnC1.c1: Development data stream - documentation not supported sgpsondeC1.a1: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondeC1.a0: Humidity, relative(rh) Dewpoint Temperature(dp) DsgpsondeB1.a0: Development data stream - documentation not supported sgpsondewrpnC1.00: Raw data stream - documentation not supported sgpsondeB5.a0: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondewrpnB4.00: Raw data stream - documentation not supported sgpsondeB5.a1: Humidity, relative(rh) Dewpoint Temperature(dp) DsgpsondeB1.a1: Development data stream - documentation not supported sgpsondewrprC1.a1: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewrprB5.a0: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondewrprB5.a1: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondewrpnC1.a0: Humidity, relative(rh) Dewpoint Temperature(dp) sgpsondewnprC1.a0: Dewpoint Temperature(dp) Humidity, relative(rh) sgpsondeB1.00: Raw data stream - documentation not supported sgpsondewrprC1.a0: Dewpoint Temperature(dp) Humidity, relative(rh)

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