DQRs for Session: 114894 User:sbensonCompleted: 10-15-2008

Data Quality Reports for Session: 114894 User: sbenson Completed: 10/15/2008

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D000219.1	SGP/SONDE/C1 - Incorrect surface temperature	sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
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
D000625.1	SGP/SONDE/C1 - Operator used wrong calibration tape	sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D000801.2	SGP/SONDE/C1 - Incorrect absolute pressure	sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D001107.1	SGP/SONDE/C1 - Incorrect surface temperature	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D970111.1	Incorrect surface temperature	sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D970318.2	Questionable RH	sgpsondewrpnC1.a1
D970507.2	Jump in pressure value	sgpsondewrpnC1.a1
D970624.2	Incorrect surface values	sgpsondewrpnC1.a1
D970625.1	Bad sounding file CF 970622:0228	sgpsondewrpnC1.a1
D970709.1	Bad pressure values CF sounding 970704:0525	sgpsondewrpnC1.a1
D970923.2	Pressure jump at launch	sgpsondewrpnC1.a1
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
D980126.2	Incorrect surface temperature and humidity	sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D980506.1	Incorrect surface values	sgpsondewrpnC1.a1
D980507.4	Incorrect surface pressure	sgpsondewrpnC1.a1
D980511.2	Incorrect surface pressure	sgpsondewrpnC1.a1
D980716.1	Bad sounding	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, 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	DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, 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, sgpsondeptuC1.00, 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
D990210.1	SGP/SONDE - Wrong cal tape	sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D990303.1	SGP/SONDE - Pressure jump at launch	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D990329.1	Incorrect surface RH	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D990513.1	SGP/SONDE - RH probably biased low in several soundings	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D991221.1	SGP/SONDE - Incorrect surface temperature	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D991228.1	SGP/SONDE - Incorrect surface temperature	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1

DQRID : D000219.1

Start Date	Start Time	End Date	End Time
02/17/2000	2330	02/17/2000	2330

Subject:	SGP/SONDE/C1 - Incorrect surface temperature
DataStreams:	sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	It appears as if the operator mis-typed the temperature when entering the surface values into the system. The value appears as 89.0 degC instead of 8.9 degC. Also note that there are no RH data in this sounding other than the initial value of 100%. The reason for this loss of RH is unknown.
Measurements:	sgpsondewrpnC1.a0: Relative humidity inside the instrument enclosure(rh) Surface dew point temperature(dp) Dry bulb temperature(tdry) sgpsondewrpnC1.a1: Relative humidity inside the instrument enclosure(rh) Dry bulb temperature(tdry) Surface dew point temperature(dp)

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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.a0: Retrieved pressure profile(pres) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: Retrieved pressure profile(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.a0: Retrieved pressure profile(pres) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: Retrieved pressure profile(pres)

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DQRID : D000625.1

Start Date	Start Time	End Date	End Time
06/23/2000	2330	06/24/2000	0100

Subject:	SGP/SONDE/C1 - Operator used wrong calibration tape
DataStreams:	sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	It appears as if the operators had a problem with the original sounding and launched a second radiosonde. Apparently they used the calibration tape that came with the first radiosonde (serial number 943156405) in place of the one that was correct for the second radiosonde (sn 943156406) and all the data are bad after the first sample (surface values).
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) Mean Wind Speed(wspd) Ascent Rate(asc) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Surface dew point temperature(dp) lat(lat) Dummy altitude for Zeb(alt) Wind Direction(deg) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondeC1.a0: Dummy altitude for Zeb(alt) Surface dew point temperature(dp) Ascent Rate(asc) Dry bulb temperature(tdry) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Mean Wind Speed(wspd) lat(lat) base time(base_time) lon(lon) Retrieved pressure profile(pres) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewndcalcC1.c1: W-to-E Component of wind, calculated(u_wind_calc) lon(lon) lat(lat) Flags for input v_wind values(v_wind_flags) Flags for input u_wind values(u_wind_flags) base time(base_time) S-to-N Component of Wind, calculated(v_wind_calc) Retrieved pressure profile(pres) Time offset of tweaks from base_time(time_offset) Dummy altitude for Zeb(alt) sgpsondeC1.a1: Dummy altitude for Zeb(alt) Relative humidity inside the instrument enclosure(rh) Ascent Rate(asc) base time(base_time) Mean Wind Speed(wspd) U-component(u_wind) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Retrieved pressure profile(pres) lon(lon) Time offset of tweaks from base_time(time_offset) lat(lat) Dry bulb temperature(tdry) V-component(v_wind) sgpsondeC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: Ascent Rate(asc) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) lat(lat) lon(lon) V-component(v_wind) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Retrieved pressure profile(pres) U-component(u_wind) Dry bulb temperature(tdry) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd)

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DQRID : D000801.2

Start Date	Start Time	End Date	End Time
07/25/2000	0533	07/25/2000	0724

Subject:	SGP/SONDE/C1 - Incorrect absolute pressure
DataStreams:	sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	The surface pressure (983.5 hPa) reported by this radiosonde (sn 94315713) is substantially higher than that reported by the THWAPS (~977) or by the sondes used in the previous and following soundings (976.6, 977.3). This may be a calibration problem or a mechanic problem on launch. The pressure values reported in the remainder of the sounding are consistent with the reported surface pressure, so the altitudes should be correct. The absolute pressure values may be high by about 5 hPa.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewndcalcC1.c1: Retrieved pressure profile(pres) sgpsondewrpnC1.a1: Retrieved pressure profile(pres)

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DQRID : D001107.1

Start Date	Start Time	End Date	End Time
11/03/2000	2030	11/03/2000	2030

Subject:	SGP/SONDE/C1 - Incorrect surface temperature
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	The value for air temperature at the surface in this file is 23.3 degC. This value is too high and resulted from incorrect data entry (typographic mistake) by the operator. The true value as determined from the operator pre-launch logs is 12.3 degC.
Measurements:	sgpsondewrpnC1.a0: Dry bulb temperature(tdry) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: Dry bulb temperature(tdry)

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DQRID : D970111.1

Start Date	Start Time	End Date	End Time
01/10/1997	1730	01/10/1997	1730

Subject:	Incorrect surface temperature
DataStreams:	sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	DQR No: Platform: sgpsondeC1 Subject: Incorrect surface temperature: sounding C1 01/10/97:1730 Date Submitted: 1/11/97 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member _X_ Other - Site Ops For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 01/10/97 Time 17:30 (GMT) End Date Time (GMT) Data should be labeled: ____ questionable ___ All data fields affected _X__ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The site operator noted that the surface temperature for the subject sounding was entered incorrectly. The value entered was -3.3 degC; the correct value should be -6.3 degC. This is a fairly benign error, only the surface values will be affected. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D970318.2

Start Date	Start Time	End Date	End Time
03/07/1997	1427	03/07/1997	1427

Subject:	Questionable RH
DataStreams:	sgpsondewrpnC1.a1
Description:	DQR No: Platform: sgpsondeC1 Subject: Questionable RH: sounding C1 03/07/97:1427 Date Submitted: 3/18/97 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other - Site Ops For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1.A1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 03/07/97 Time 14:27 (GMT) End Date Time (GMT) Data should be labeled: _X__ questionable _?_ All data fields affected _X__ incorrect _X_ Only some data fields affected _?_ wrong calibration ___ others Discussion of Problem: David Cook pointed out that the RH values for the subject sounding disagree substantially with values reported at the 60m tower. Review of the sounding data shows saturation (100%) values reported at the surface and during most of the sounding. The site ops log shows RH values of between 68% (1400) and 52% (1500) at the surface. Surface temperature (8.4) and pressure (983.0) obtained from the sonde are not substantially different from the surface observations (7.8/10.8) and (982.7/982.4) at 1400 and 1500 respectively, so it is unlikely that an incorrect calibration tape was used for the sonde. I think the conclusion must be that the RH sensor on this sonde was bad. As an operational issue, this sonde should have been rejected by site ops because the surface RH value of 100% is more than 7% different than the surface value obtained from an independent reference instrument. I will check the procedures that I have provided to site ops to be sure that I included this criterion. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data.
Measurements:	sgpsondewrpnC1.a1: Wind Status(wstat) lon(lon) Relative humidity inside the instrument enclosure(rh) V-component(v_wind) Ascent Rate(asc) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D970507.2

Start Date	Start Time	End Date	End Time
05/05/1997	1732	05/05/1997	1732

Subject:	Jump in pressure value
DataStreams:	sgpsondewrpnC1.a1
Description:	DQR No: Platform: sgpsondeC1 Subject: Jump in pressure value C1 sounding 970505.1732 Date Submitted: 5/06/97 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnc1/ (alt, asc, press) What level data: (raw,a0,a1,b1,c1 etc): all What location was the data collected at: SGP/CF Period of time in question Begin Date 5/05/97 Time 17:32 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable _X_ All data fields affected _X_ incorrect ___ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The first pressure value reported by the radiosonde (t = 2 sec) is 974.9. The surface pressure value was 980.9 hPa. This difference is somewhat greater than the expected (normal) change and may mean that either the pressure sensor was jarred during launch or the system mis-identified the actual launch start time. Further clarification requires analysis of the raw data which will take some time. The altitude values for this sounding will be incorrect. The ascent rate values during the first 30 seconds also will be wrong. Because the system will reject samples with out of bound ascent rates (i.e., during the first 30 seconds), the temperature and rh values also will be incorrect (result of interpolation). Relative height values after 30 seconds should be okay. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data.
Measurements:	sgpsondewrpnC1.a1: Wind Status(wstat) lon(lon) Relative humidity inside the instrument enclosure(rh) V-component(v_wind) Ascent Rate(asc) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D970624.2

Start Date	Start Time	End Date	End Time
06/21/1997	2027	06/21/1997	2027

Subject:	Incorrect surface values
DataStreams:	sgpsondewrpnC1.a1
Description:	DQR No: Platform: sgpsondeC1 Subject: Incorrect surface values sounding 970621:2027 Date Submitted: 6/23/97 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnc1 What level data: (raw,a0,a1,b1,c1 etc): all What location was the data collected at: SGP/CF Period of time in question Begin Date 6/21/97 Time 20:27 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: Site operations reports that incorrect surface values were entered into the subject sounding. Instead of 972.3, 33.7, and 46 the surface pressure, temperature, and humidity values should have been 971.8, 33.3, and 47. The incorrect surface pressure will result in incorrect altitudes throughout the profile and incorrect ascent rate values during the first 30 seconds. The effects of the incorrect temperature and relative humidty values should be negligable. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data.
Measurements:	sgpsondewrpnC1.a1: Wind Status(wstat) lon(lon) Relative humidity inside the instrument enclosure(rh) V-component(v_wind) Ascent Rate(asc) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D970625.1

Start Date	Start Time	End Date	End Time
06/22/1997	0228	06/22/1997	0236

Subject:	Bad sounding file CF 970622:0228
DataStreams:	sgpsondewrpnC1.a1
Description:	It appears that there was a problem with the radiosonde that generated this short file. The pressure values are unreasonably high and the file terminated after only 484 seconds of flight. I note that the operators started a new sounding at 0252. This entire file should be disregarded or deleted.
Measurements:	sgpsondewrpnC1.a1: Wind Status(wstat) lon(lon) Relative humidity inside the instrument enclosure(rh) V-component(v_wind) Ascent Rate(asc) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D970709.1

Start Date	Start Time	End Date	End Time
07/04/1997	0525	07/04/1997	0630

Subject:	Bad pressure values CF sounding 970704:0525
DataStreams:	sgpsondewrpnC1.a1
Description:	The pressure values and hence altitude values are most likely incorrect in this sounding. It also appears that an incorrect surface pressure value was entered by the operator. The surface pressure value in the data (986.8) is somewhat higher than the surface pressures for the neighboring soundings and higher than recorded in the raw data collected before launch (~978 hPa). The first pressure value recorded by the sonde after launch is 884.8 hPa. Analysis of the absolutely raw data reveals that the sonde was reading about 978 hPa well before launch, then suddenly dropped to 886.8 at which it remained stable for several minutes, then began slowly decreasing as would be expected after launch. My best guess is that the sonde was somehow damaged during handling before launch resulting in erroneous pressure values. Relative pressure changes from an 'apparent' surface value of 886.8 hPa may be correct, but the absolute pressure values are not.
Measurements:	sgpsondewrpnC1.a1: Wind Status(wstat) lon(lon) Relative humidity inside the instrument enclosure(rh) V-component(v_wind) Ascent Rate(asc) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D970923.2

Start Date	Start Time	End Date	End Time
09/21/1997	0530	09/21/1997	0530

Subject:	Pressure jump at launch
DataStreams:	sgpsondewrpnC1.a1
Description:	The difference between the first pressure value recorded by the radiosonde after launch (984.5) that the surface value entered by the operator (989.3) is somewhat larger than would normally be expected. This will result in incorrect altitude values throughout the sounding. The ascent rates during the first 30 seconds also will be incorrect.
Measurements:	sgpsondewrpnC1.a1: Wind Status(wstat) lon(lon) Relative humidity inside the instrument enclosure(rh) V-component(v_wind) Ascent Rate(asc) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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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:	sgpsondewrpnC1.a0: Mean Wind Speed(wspd) Ascent Rate(asc) lon(lon) Surface dew point temperature(dp) lat(lat) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) Dry bulb temperature(tdry) Wind Status(wstat) Wind Direction(deg) base time(base_time) sgpsondewrpnB5.a1: Ascent Rate(asc) Dry bulb temperature(tdry) Retrieved pressure profile(pres) base time(base_time) Wind Direction(deg) Time offset of tweaks from base_time(time_offset) Dummy altitude for Zeb(alt) lat(lat) V-component(v_wind) Mean Wind Speed(wspd) Surface dew point temperature(dp) lon(lon) U-component(u_wind) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) sgpsondewrpnB4.a0: Time offset of tweaks from base_time(time_offset) Dry bulb temperature(tdry) Retrieved pressure profile(pres) Mean Wind Speed(wspd) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Status(wstat) Ascent Rate(asc) lon(lon) base time(base_time) Surface dew point temperature(dp) Wind Direction(deg) lat(lat) sgpsondewrpnB1.a0: Wind Direction(deg) lat(lat) Ascent Rate(asc) Mean Wind Speed(wspd) Dry bulb temperature(tdry) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Retrieved pressure profile(pres) Wind Status(wstat) base time(base_time) Time offset of tweaks from base_time(time_offset) Surface dew point temperature(dp) lon(lon) sgpsondewrpnB6.a0: lat(lat) base time(base_time) Wind Direction(deg) Surface dew point temperature(dp) Mean Wind Speed(wspd) lon(lon) Time offset of tweaks from base_time(time_offset) Dummy altitude for Zeb(alt) Ascent Rate(asc) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Retrieved pressure profile(pres) Dry bulb temperature(tdry) sgpsondewrpnB5.a0: Time offset of tweaks from base_time(time_offset) Wind Direction(deg) base time(base_time) Dry bulb temperature(tdry) Dummy altitude for Zeb(alt) Ascent Rate(asc) Surface dew point temperature(dp) Wind Status(wstat) lat(lat) Relative humidity inside the instrument enclosure(rh) lon(lon) Retrieved pressure profile(pres) Mean Wind Speed(wspd) sgpsondewrpnB4.a1: Wind Status(wstat) Time offset of tweaks from base_time(time_offset) V-component(v_wind) Surface dew point temperature(dp) lat(lat) Wind Direction(deg) Mean Wind Speed(wspd) Relative humidity inside the instrument enclosure(rh) Retrieved pressure profile(pres) Dry bulb temperature(tdry) Ascent Rate(asc) lon(lon) U-component(u_wind) Dummy altitude for Zeb(alt) base time(base_time) sgpsondewrpnB6.a1: Mean Wind Speed(wspd) Relative humidity inside the instrument enclosure(rh) lon(lon) Dummy altitude for Zeb(alt) Retrieved pressure profile(pres) Wind Status(wstat) base time(base_time) V-component(v_wind) Time offset of tweaks from base_time(time_offset) Dry bulb temperature(tdry) U-component(u_wind) Wind Direction(deg) Surface dew point temperature(dp) Ascent Rate(asc) lat(lat) sgpsondewrpnC1.a1: Relative humidity inside the instrument enclosure(rh) lat(lat) lon(lon) U-component(u_wind) Dry bulb temperature(tdry) base time(base_time) Surface dew point temperature(dp) Ascent Rate(asc) Dummy altitude for Zeb(alt) Wind Direction(deg) V-component(v_wind) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Retrieved pressure profile(pres) Mean Wind Speed(wspd) sgpsondewrpnB1.a1: Wind Direction(deg) Dry bulb temperature(tdry) Wind Status(wstat) Ascent Rate(asc) U-component(u_wind) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) Retrieved pressure profile(pres) lon(lon) lat(lat) V-component(v_wind) Dummy altitude for Zeb(alt) Mean Wind Speed(wspd) Relative humidity inside the instrument enclosure(rh) base time(base_time)

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DQRID : D980126.2

Start Date	Start Time	End Date	End Time
01/19/1998	1130	01/19/1998	1130

Subject:	Incorrect surface temperature and humidity
DataStreams:	sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	Incorrect values of surface temperature and relative humidity were entered by the operator. The surface temperature was entered as 17.5 degC; the first value reported by the sonde was -3.6 degC. The surface humidity was entered as 26; the first value reported by the sonde was 81%. It appears that the operator used the inside temperature/humidity rather than the sonde-reported outside temperature/humidity. Only the first few samples of the sounding will be affected. Note that the delta-check QC flag is set by this error.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D980506.1

Start Date	Start Time	End Date	End Time
04/29/1998	1431	04/29/1998	1431

Subject:	Incorrect surface values
DataStreams:	sgpsondewrpnC1.a1
Description:	The surface pressure, temperature, and relative humidity are incorrect for this soundings. The values in the sounding netCDF file (975.6, 3.2, 86) are different from the surface observations in the site ops log (978.9, 9.1, and 83) and from the values in the raw radiosonde data file at the moment just before ascent (978.7, 9.5, 83). The reason for the differences are unknown, but insofar as the surface values are manually entered by the operator into both the log (where they are correct) and into the sounding file (where they are incorrect) an operator miscue is a possibility. The major effect of this problem will be incorrect absolute altitude.
Measurements:	sgpsondewrpnC1.a1: Wind Status(wstat) lon(lon) Relative humidity inside the instrument enclosure(rh) V-component(v_wind) Ascent Rate(asc) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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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: Wind Status(wstat) lon(lon) Relative humidity inside the instrument enclosure(rh) V-component(v_wind) Ascent Rate(asc) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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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: Wind Status(wstat) lon(lon) Relative humidity inside the instrument enclosure(rh) V-component(v_wind) Ascent Rate(asc) Dummy altitude for Zeb(alt) Time offset of tweaks from base_time(time_offset) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D980716.1

Start Date	Start Time	End Date	End Time
07/14/1998	2346	07/14/1998	2346

Subject:	Bad sounding
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	Data from this sounding look very fragmented as if only a few actual points were collected and intermediate points were intepolated. In a general sense this sounding looks 'weird' and should not be trusted. I do not yet have access to r1 so I can't look at the raw data, but I doubt that it will shed much light on the situation.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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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.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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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.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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

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DQRID : D990210.1

Start Date	Start Time	End Date	End Time
02/09/1999	0834	02/09/1999	1016

Subject:	SGP/SONDE - Wrong cal tape
DataStreams:	sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	There is something wrong with this sounding, its not clear exactly what happened, however. The first values reported by the radiosonde are much different from those entered by the operator. My impression is that this is a calibration tape mixup. The raw data file shows that the sounding software was initialized twice for this sounding, the first time showing sonde 823360910, the second time showing sonde 819351814. There is no enties in the operations log that describe a problem with a sonde before launch.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewndcalcC1.c1: lat(lat) Flags for input v_wind values(v_wind_flags) Flags for input u_wind values(u_wind_flags) W-to-E Component of wind, calculated(u_wind_calc) base time(base_time) S-to-N Component of Wind, calculated(v_wind_calc) Retrieved pressure profile(pres) lon(lon) Time offset of tweaks from base_time(time_offset) Dummy altitude for Zeb(alt) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) U-component(u_wind) Dry bulb temperature(tdry) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D990303.1

Start Date	Start Time	End Date	End Time
03/02/1999	0828	03/02/1999	0828

Subject:	SGP/SONDE - Pressure jump at launch
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	The difference between the sonde-reported pressure at the surface (969.1 hPa) and the first pressure value reported after launch (963.5) is larger than expected. This may indicate that either the pressure sensor was jarred at launch, that the system failed to correctly identify the launch start time, or some other problem. The ascent rates during the first 30 seconds of the sounding will be incorrect as will the absolute altitudes during the sounding.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D990329.1

Start Date	Start Time	End Date	End Time
03/22/1999	0230	03/22/1999	0230

Subject:	Incorrect surface RH
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	The operator entered an incorrect value (7.5%) for the surface RH for this sounding. The correct value should have been 70%. The operator noticed the error after the sounding had been completed and reported it in his log.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D990513.1

Start Date	Start Time	End Date	End Time
05/10/1999	1130	05/11/1999	2041

Subject:	SGP/SONDE - RH probably biased low in several soundings
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	In the process of moving storage facilties, site operations uncovered some old radiosondes (vintage April 1998) that were used in several soundings starting on May 10 at 0530 and continuing at least through May 11 at 2040. Because these sondes are so old and pre-date Vaisala's repackaging they are likely subject to the sensor contamination problem that results in a dry bias in RH. The sondes in question have serial numbers 816XXXXXX.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D991221.1

Start Date	Start Time	End Date	End Time
12/18/1999	0530	12/18/1999	0530

Subject:	SGP/SONDE - Incorrect surface temperature
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	The operator entered 20.0 degrees rather than the true temperature of 2.0 degrees.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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DQRID : D991228.1

Start Date	Start Time	End Date	End Time
12/22/1999	2330	12/22/1999	2330

Subject:	SGP/SONDE - Incorrect surface temperature
DataStreams:	sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:	The operator entered the surface temperature as 25 degC rather than the correct 2.5 deg C. This is the second time in a week this type of error has occurred. I have sent a separate e-mail to site ops.
Measurements:	sgpsondewrpnC1.a0: Retrieved pressure profile(pres) Relative humidity inside the instrument enclosure(rh) lat(lat) Mean Wind Speed(wspd) Ascent Rate(asc) Dummy altitude for Zeb(alt) Dry bulb temperature(tdry) lon(lon) Wind Status(wstat) Wind Direction(deg) Surface dew point temperature(dp) Time offset of tweaks from base_time(time_offset) base time(base_time) sgpsondewrpnC1.00: null(Raw data stream - documentation not supported) sgpsondewrpnC1.a1: lon(lon) V-component(v_wind) Ascent Rate(asc) Time offset of tweaks from base_time(time_offset) Wind Status(wstat) Relative humidity inside the instrument enclosure(rh) Dummy altitude for Zeb(alt) Wind Direction(deg) Retrieved pressure profile(pres) Dry bulb temperature(tdry) U-component(u_wind) base time(base_time) Surface dew point temperature(dp) Mean Wind Speed(wspd) lat(lat)

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