DQRs for Session: 113770 User:gaustadCompleted: 08-22-2008

Data Quality Reports for Session: 113770 User: gaustad Completed: 08/22/2008

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D030917.21	SGP/THWAPS/B1/B5/B6/C1 - Missing data due to Ice storm and clock problems	sgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1, sgpthwapsB5.00, sgpthwapsB5.a1, sgpthwapsB5.b1, sgpthwapsB6.00, sgpthwapsB6.a1, sgpthwapsB6.b1, sgpthwapsC1.00, sgpthwapsC1.a1, sgpthwapsC1.b1
D050209.14	SGP/THWAPS/B1 - Wind Data Suspect	sgpthwapsB1.b1
D050813.1	SGP/THWAPS/B1 - Minor bias in humidity	sgpthwapsB1.a1, sgpthwapsB1.b1
D050813.2	SGP/THWAPS/B1 - Minor bias in saturation vapor pressure	sgpthwapsB1.b1
D080116.19	SGP/THWAPS/B1 - Wind Data Incorrect Due to Icing	sgpthwapsB1.b1
D080116.20	SGP/THWAPS/B1 - T/RH Data Incorrect	sgpthwapsB1.b1
D991008.2	SGP/THWAPS - RH low by factor of 1.1	sgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1

DQRID : D030917.21

Start Date	Start Time	End Date	End Time
03/09/2002	2055	03/11/2002	2005
03/13/2002	1755	03/14/2002	1505

Subject:	SGP/THWAPS/B1/B5/B6/C1 - Missing data due to Ice storm and clock problems
DataStreams:	sgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1, sgpthwapsB5.00, sgpthwapsB5.a1, sgpthwapsB5.b1, sgpthwapsB6.00, sgpthwapsB6.a1, sgpthwapsB6.b1, sgpthwapsC1.00, sgpthwapsC1.a1, sgpthwapsC1.b1
Description:	Data are missing due to power failures caused by an ice storm and resulting system/instrument clock problems.
Measurements:	sgpthwapsC1.a1: Standard Deviation of Relative Humidity(sd_rh) Unit Vector Wind Direction(wdir) lat(lat) Standard Deviation of Vapor Pressure(sd_vap_pres) Relative humidity inside the instrument enclosure(rh) Time offset of tweaks from base_time(time_offset) Mean Wind Speed(wspd) Vapor Pressure (kiloPascals)(vap_pres) Beam 0 Temperature(temp) Standard Deviation of Air Temperature(sd_temp) base time(base_time) Standard Deviation of Wind Direction(sd_wdir) lon(lon) Standard Deviation of Pressure(sd_pres) Retrieved pressure profile(pres) Batter Voltage(vbat) Dummy altitude for Zeb(alt) sgpthwapsB1.b1: Retrieved pressure profile(pres) lat(lat) Standard Deviation of Relative Humidity(sd_rh) Standard Deviation of Air Temperature(sd_temp) Batter Voltage(vbat) Unit Vector Wind Direction(wdir) Beam 0 Temperature(temp) Vapor Pressure (kiloPascals)(vap_pres) Time offset of tweaks from base_time(time_offset) Standard Deviation of Pressure(sd_pres) Relative humidity inside the instrument enclosure(rh) Mean Wind Speed(wspd) Standard Deviation of Wind Direction(sd_wdir) lon(lon) base time(base_time) Dummy altitude for Zeb(alt) Standard Deviation of Vapor Pressure(sd_vap_pres) sgpthwapsB5.00: null(Raw data stream - documentation not supported) sgpthwapsB6.00: null(Raw data stream - documentation not supported) sgpthwapsB6.a1: lon(lon) Batter Voltage(vbat) Standard Deviation of Relative Humidity(sd_rh) Standard Deviation of Wind Direction(sd_wdir) Mean Wind Speed(wspd) Vapor Pressure (kiloPascals)(vap_pres) Relative humidity inside the instrument enclosure(rh) Time offset of tweaks from base_time(time_offset) Standard Deviation of Vapor Pressure(sd_vap_pres) lat(lat) Retrieved pressure profile(pres) Unit Vector Wind Direction(wdir) base time(base_time) Dummy altitude for Zeb(alt) Beam 0 Temperature(temp) Standard Deviation of Pressure(sd_pres) Standard Deviation of Air Temperature(sd_temp) sgpthwapsB5.b1: Relative humidity inside the instrument enclosure(rh) Standard Deviation of Air Temperature(sd_temp) Batter Voltage(vbat) lon(lon) Mean Wind Speed(wspd) Time offset of tweaks from base_time(time_offset) base time(base_time) Vapor Pressure (kiloPascals)(vap_pres) Retrieved pressure profile(pres) lat(lat) Standard Deviation of Vapor Pressure(sd_vap_pres) Standard Deviation of Wind Direction(sd_wdir) Standard Deviation of Pressure(sd_pres) Unit Vector Wind Direction(wdir) Standard Deviation of Relative Humidity(sd_rh) Beam 0 Temperature(temp) Dummy altitude for Zeb(alt) sgpthwapsC1.00: null(Raw data stream - documentation not supported) sgpthwapsB1.a1: Standard Deviation of Vapor Pressure(sd_vap_pres) Relative humidity inside the instrument enclosure(rh) Standard Deviation of Wind Direction(sd_wdir) Batter Voltage(vbat) lon(lon) Time offset of tweaks from base_time(time_offset) lat(lat) Beam 0 Temperature(temp) Mean Wind Speed(wspd) Standard Deviation of Pressure(sd_pres) Standard Deviation of Relative Humidity(sd_rh) base time(base_time) Vapor Pressure (kiloPascals)(vap_pres) Standard Deviation of Air Temperature(sd_temp) Retrieved pressure profile(pres) Dummy altitude for Zeb(alt) Unit Vector Wind Direction(wdir) sgpthwapsC1.b1: lon(lon) Retrieved pressure profile(pres) Batter Voltage(vbat) Beam 0 Temperature(temp) Time offset of tweaks from base_time(time_offset) lat(lat) Dummy altitude for Zeb(alt) Standard Deviation of Vapor Pressure(sd_vap_pres) Standard Deviation of Air Temperature(sd_temp) Standard Deviation of Wind Direction(sd_wdir) Unit Vector Wind Direction(wdir) base time(base_time) Relative humidity inside the instrument enclosure(rh) Standard Deviation of Relative Humidity(sd_rh) Vapor Pressure (kiloPascals)(vap_pres) Standard Deviation of Pressure(sd_pres) Mean Wind Speed(wspd) sgpthwapsB1.00: null(Raw data stream - documentation not supported) sgpthwapsB6.b1: Standard Deviation of Vapor Pressure(sd_vap_pres) Batter Voltage(vbat) lat(lat) Standard Deviation of Pressure(sd_pres) Standard Deviation of Air Temperature(sd_temp) Time offset of tweaks from base_time(time_offset) Standard Deviation of Wind Direction(sd_wdir) Relative humidity inside the instrument enclosure(rh) Beam 0 Temperature(temp) Vapor Pressure (kiloPascals)(vap_pres) Unit Vector Wind Direction(wdir) Retrieved pressure profile(pres) Dummy altitude for Zeb(alt) base time(base_time) Mean Wind Speed(wspd) Standard Deviation of Relative Humidity(sd_rh) lon(lon) sgpthwapsB5.a1: Unit Vector Wind Direction(wdir) Standard Deviation of Vapor Pressure(sd_vap_pres) base time(base_time) Standard Deviation of Relative Humidity(sd_rh) Batter Voltage(vbat) Relative humidity inside the instrument enclosure(rh) lat(lat) Dummy altitude for Zeb(alt) Standard Deviation of Air Temperature(sd_temp) Standard Deviation of Pressure(sd_pres) lon(lon) Time offset of tweaks from base_time(time_offset) Standard Deviation of Wind Direction(sd_wdir) Vapor Pressure (kiloPascals)(vap_pres) Mean Wind Speed(wspd) Retrieved pressure profile(pres) Beam 0 Temperature(temp)

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DQRID : D050209.14

Start Date	Start Time	End Date	End Time
01/03/2005	0000	01/09/2005	2359

Subject:	SGP/THWAPS/B1 - Wind Data Suspect
DataStreams:	sgpthwapsB1.b1
Description:	Wind speed and direction data suspect during time period due to icing.
Measurements:	sgpthwapsB1.b1: Mean Wind Speed(wspd) Standard Deviation of Wind Direction(sd_wdir) Unit Vector Wind Direction(wdir)

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DQRID : D050813.1

Start Date	Start Time	End Date	End Time
09/21/1999	0000	12/07/1999	1800

Subject:	SGP/THWAPS/B1 - Minor bias in humidity
DataStreams:	sgpthwapsB1.a1, sgpthwapsB1.b1
Description:	The THWAPS humidity sensor output was scaled so that the instrument output voltage range (0-1VDC) represented 0-100 %RH. Comparisons with the co-located chilled mirror sensor at the CF suggested that the THWAPS RH sensor was reading artifically low at high humidities because of this 100 %RH maximum. The scaling of the system was changed so that 0-1 VDC now represents 0-110 %RH. This resulted in a slight loss of precision in the measurements, but since the RH measurement is only accurate to 2-3 %RH at best, this isn't a significant problem.
Measurements:	sgpthwapsB1.b1: Relative humidity inside the instrument enclosure(rh) sgpthwapsB1.a1: Relative humidity inside the instrument enclosure(rh)

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DQRID : D050813.2

Start Date	Start Time	End Date	End Time
09/21/1999	0000	08/01/2005	2034

Subject:	SGP/THWAPS/B1 - Minor bias in saturation vapor pressure
DataStreams:	sgpthwapsB1.b1
Description:	The saturation vapor correction when temps are below 0C contained an error in the multiplier. The incorrect multiplier only equates to an error of 0.01 kPa which is less than the stated uncertainty of the measurement (+/- 0.035 kPa).
Measurements:	sgpthwapsB1.b1: Vapor Pressure (kiloPascals)(vap_pres)

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DQRID : D080116.19

Start Date	Start Time	End Date	End Time
12/10/2007	2050	12/11/2007	2213

Subject:	SGP/THWAPS/B1 - Wind Data Incorrect Due to Icing
DataStreams:	sgpthwapsB1.b1
Description:	An ice storm caused the wind data from the RM Young wind sensor to be incorrect. In many instances it was frozen and unmoving, at times it measured values but those are extremely suspect.
Measurements:	sgpthwapsB1.b1: Mean Wind Speed(wspd) Standard Deviation of Wind Direction(sd_wdir) Unit Vector Wind Direction(wdir)

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DQRID : D080116.20

Start Date	Start Time	End Date	End Time
12/16/2007	2306	12/20/2007	1806

Subject:	SGP/THWAPS/B1 - T/RH Data Incorrect
DataStreams:	sgpthwapsB1.b1
Description:	The T/RH data was incorrect during the listed time period. Reason unknown. The sensor recovered on it's own.
Measurements:	sgpthwapsB1.b1: Standard Deviation of Relative Humidity(sd_rh) Vapor Pressure (kiloPascals)(vap_pres) Standard Deviation of Air Temperature(sd_temp) Beam 0 Temperature(temp) Standard Deviation of Vapor Pressure(sd_vap_pres) Relative humidity inside the instrument enclosure(rh)

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DQRID : D991008.2

Start Date	Start Time	End Date	End Time
09/28/1999	1345	10/14/1999	1440

Subject:	SGP/THWAPS - RH low by factor of 1.1
DataStreams:	sgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1
Description:	Because of instrument mentor stupidity, all B1 TWHAPS RH values collected since the specified being date are low by a factor of 1.1. This problem also will affect the vapor pressure values in the file, but the scaling will not be linear. See companion DQR for THWAPS C1 for more detail.
Measurements:	sgpthwapsB1.b1: Standard Deviation of Relative Humidity(sd_rh) Vapor Pressure (kiloPascals)(vap_pres) Standard Deviation of Vapor Pressure(sd_vap_pres) Relative humidity inside the instrument enclosure(rh) sgpthwapsB1.a1: Relative humidity inside the instrument enclosure(rh) Vapor Pressure (kiloPascals)(vap_pres) Standard Deviation of Relative Humidity(sd_rh) Standard Deviation of Vapor Pressure(sd_vap_pres) sgpthwapsB1.00: null(Raw data stream - documentation not supported)

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