DQRs for Session: 147950 User:vghateCompleted: 02-17-2013

Data Quality Reports for Session: 147950 User: vghate Completed: 02/17/2013

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D050725.9	TWP/MWR/C1 - Reprocessed: Revised Retrieval Coefficients	twp5mwravgC1.c1, twpmwrlosC1.b1, twpmwrtipC1.a1
D050928.1	TWP/MWR/C1 - New software version (4.15) installed	twpmwrtipC1.a1, twpmwrlosC1.b1
D061114.2	TWP/MWR/C1 - Radiometer failure	twpmwrC1.00, twpmwrlosC1.b1, twpmwrtipC1.a1
D070105.1	TWP/MWR/C1 - Missing data	twpmwrlosC1.b1, twpmwrtipC1.a1
D070412.3	TWP/MWR/C1/C2 - Sun in the field of view	twpmwrlosC1.b1, twpmwrlosC2.b1, twpmwrtipC1.a1, twpmwrtipC2.a1
D070613.1	TWP/MWR/C1 - Intermittent data	twpmwrlosC1.b1, twpmwrtipC1.a1
D071208.1	TWP/MWR/C1 - Incorrect ambient temperature readings	twpmwrlosC1.b1, twpmwrtipC1.a1
D081013.2	TWP/MWR/C1 - Short periods of wrong ambient temperature	twpmwrlosC1.b1, twpmwrtipC1.a1
D090114.4	TWP/MWR/C1 - Ambient temperature data missing	twpmwrlosC1.b1, twpmwrtipC1.a1

DQRID : D050725.9

Start Date	Start Time	End Date	End Time
05/04/2002	0200	06/30/2005	2100

Subject:	TWP/MWR/C1 - Reprocessed: Revised Retrieval Coefficients
DataStreams:	twp5mwravgC1.c1, twpmwrlosC1.b1, twpmwrtipC1.a1
Description:	IN THE BEGINNING (June 1992), the retrieval coefficients used to derive the precipitable water vapor (PWV) and liquid water path (LWP) from the MWR brightness temperatures were based on the Liebe and Layton (1987) water vapor and oxygen absorption model and the Grant (1957) liquid water absorption model. Following the SHEBA experience, revised retrievals based on the more recent Rosenkranz (1998) water vapor and oxygen absorption models and the Liebe (1991) liquid waer absorption model were developed. The Rosenkranz water vapor absorption model resulted a 2 percent increase in PWV relative to the earlier Liebe and Layton model. The Liebe liquid water absorption model decreased the LWP by 10% relative to the Grant model. However, the increased oxygen absorption caused a 0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was particularly significant for low LWP conditions (i.e. thin clouds encountered at SHEBA). Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and Clough, TGARS v. 43, pp 1102-1108, 2005) that the half-width of the 22 GHz water vapor line from the HITRAN compilation, which is 5 percent smaller than the Liebe and Dillon (1969) half-width used in Rosenkranz (1998), provided a better fit to the microwave brightness temperature measurements at 5 frequencies in the range 22-30 GHz, and yielded more accurate retrievals. Accordingly, revised MWR retrieval coefficients have been developed using MONORTM, which utilizes the HITRAN compilation for its spectroscopic parameters. These new retrievals provide 3 percent less PWV and 2.6 percent greater LWP than the previous retrievals based on Rosenkranz (1998). The Rosenkranz-based retrieval coefficients became active at TWP.C1 20020504.0200. The MONORTM-based retrieval coefficients became active at TWP.C1 20050630.2100. Note: The TWP.C1 data for 19961011-20050630 have been reprocessed to apply the
Measurements:	twp5mwravgC1.c1: Total liquid water along LOS path(liq) Total water vapor along LOS path(vap) twpmwrtipC1.a1: liqtip vaptip twpmwrlosC1.b1: Total liquid water along LOS path(liq) Total water vapor along LOS path(vap)

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DQRID : D050928.1

Start Date	Start Time	End Date	End Time
10/31/2002	2200	09/13/2005	1854

Subject:	TWP/MWR/C1 - New software version (4.15) installed
DataStreams:	twpmwrtipC1.a1, twpmwrlosC1.b1
Description:	A problem began with the installation of MWR.EXE version 4.12 in October 2002. The software had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier problem. The software upgrade corrected the earlier problem but introduced a new one that caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of tip curves, and saturation of CPU usage. Software versions 4.13 and 4.14 also produced these problems. The new MWR software version (4.15) was installed on 9/13/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s.
Measurements:	twpmwrtipC1.a1: tnd31 tipsky31 bbn31 tbskytip31 Temperature, brightness, longwave(ir_temp) tnd23 r23 tnd31I tnd_nom23 tknd tbskytip23 tc23 tkbb1 tkbb2 r31 liqtip bb31 tkxc tc31 tnd_nom31 tkbb tipn vaptip tnd23I tkair bbn23 bb23 tipsky23 twpmwrlosC1.b1: tkair IR Brightness Temperature(sky_ir_temp) bbn23 Temperature, brightness, longwave(ir_temp) tnd31 Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) tnd_nom31 Total liquid water along LOS path(liq) tc31 tknd bb31 tnd_nom23 sky23 tkxc sky31 tc23 tkbb bbn31 bb23 31.4 GHz sky brightness temperature(tbsky31) tnd23 Total water vapor along LOS path(vap)

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DQRID : D061114.2

Start Date	Start Time	End Date	End Time
10/09/2006	1000	01/30/2007	0457

Subject:	TWP/MWR/C1 - Radiometer failure
DataStreams:	twpmwrC1.00, twpmwrlosC1.b1, twpmwrtipC1.a1
Description:	The instrument stopped responding and had to be powered off. Suspect cause of failure is a faulty digital board.
Measurements:	twpmwrC1.00: Raw data stream - documentation not supported twpmwrtipC1.a1: 31bb tnd31 alt 31expave tipsky31 tbskytip31 bbn31 23expave Temperature, brightness, longwave(ir_temp) 23ndiode 31tipsky base_time airm actel 23tipskynd tnd23 31gain actaz r23 31tipbb wet_window 23bbn 23tbzenith 31bbn 31tipskynd tnd31I 31r tnd_nom23 23tipbb tknd tbskytip23 tc23 23bb tkbb1 tkbb2 23gain 23tipsky r31 liqtip bb31 tkxc tc31 tnd_nom31 tkbb tipn vaptip lon tnd23I time_offset tkair bbn23 31ndiode lat bb23 tipsky23 31tbzenith 23r twpmwrlosC1.b1: tkair IR Brightness Temperature(sky_ir_temp) lon actaz bbn23 Temperature, brightness, longwave(ir_temp) tnd31 Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) wet_window tnd_nom31 Total liquid water along LOS path(liq) tc31 lat tknd alt actel bb31 tnd_nom23 sky23 tkxc sky31 tc23 tkbb time_offset bbn31 bb23 31.4 GHz sky brightness temperature(tbsky31) tnd23 base_time Total water vapor along LOS path(vap)

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DQRID : D070105.1

Start Date	Start Time	End Date	End Time
12/09/1996	2338	12/11/1996	0003
01/05/2011	2300	01/07/2011	0310
02/25/2011	1300	03/07/2011	0400
03/16/2011	1900	03/31/2011	0100
10/22/2011	2200	10/25/2011	0400
10/20/1999	0500	10/22/1999	0600
01/14/2000	0800	01/16/2000	0342
01/14/2006	1258	01/16/2006	0638
10/01/1999	0900	10/18/1999	0000
02/28/1997	0118	06/27/1997	2048
11/06/1997	1959	11/12/1997	1800
01/05/1998	0204	01/08/1998	2048
04/21/1998	0017	04/29/1998	1803
09/13/1998	0759	09/20/1998	0900
11/20/1998	2226	11/27/1998	1026
02/27/1999	0600	03/02/1999	0159
03/06/1999	0800	03/09/1999	1807
09/03/1999	0300	09/10/1999	0400

Subject:	TWP/MWR/C1 - Missing data
DataStreams:	twpmwrlosC1.b1, twpmwrtipC1.a1
Description:	Data are missing and unrecoverable.
Measurements:	twpmwrtipC1.a1: 31bb tnd31 alt 31expave tipsky31 tbskytip31 bbn31 23expave Temperature, brightness, longwave(ir_temp) 23ndiode 31tipsky base_time airm actel 23tipskynd tnd23 31gain actaz r23 31tipbb wet_window 23bbn 23tbzenith 31bbn 31tipskynd tnd31I 31r tnd_nom23 23tipbb tknd tbskytip23 tc23 23bb tkbb1 tkbb2 23gain 23tipsky r31 liqtip bb31 tkxc tc31 tkbb tnd_nom31 tipn lon vaptip tnd23I time_offset tkair bbn23 31ndiode lat bb23 tipsky23 31tbzenith 23r twpmwrlosC1.b1: tkair IR Brightness Temperature(sky_ir_temp) lon actaz bbn23 Temperature, brightness, longwave(ir_temp) tnd31 Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) wet_window tnd_nom31 Total liquid water along LOS path(liq) tc31 lat tknd alt actel bb31 tnd_nom23 sky23 tkxc sky31 tc23 tkbb time_offset bbn31 bb23 31.4 GHz sky brightness temperature(tbsky31) tnd23 base_time Total water vapor along LOS path(vap)

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DQRID : D070412.3

Start Date	Start Time	End Date	End Time
03/07/2007	0000	04/02/2007	2359
03/01/2008	0000	04/02/2008	2359
09/10/2008	0000	10/12/2008	0000
03/01/2009	0000	04/02/2009	2359
09/11/2009	0000	10/10/2009	2359
03/01/2010	0000	04/02/2010	2359
03/01/2011	0000	04/02/2011	2359
09/13/2011	0000	10/09/2011	0000

Subject:	TWP/MWR/C1/C2 - Sun in the field of view
DataStreams:	twpmwrlosC1.b1, twpmwrlosC2.b1, twpmwrtipC1.a1, twpmwrtipC2.a1
Description:	Every day between around noon local time (usually between 1 and 2 AM UTC time) there is an increase in the brightness temperatures due to the sun in the field of view of the radiometer. The effect lasts less than an hour around local noon (usually between 1 and 2 AM UTC time). The effect appears as a smooth increase and decrease in brightness temperature.
Measurements:	twpmwrtipC2.a1: tipsky23 tipsky31 twpmwrtipC1.a1: vaptip liqtip tbskytip23 tbskytip31 twpmwrlosC1.b1: Total liquid water along LOS path(liq) sky23 31.4 GHz sky brightness temperature(tbsky31) sky31 Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) Total water vapor along LOS path(vap) twpmwrlosC2.b1: sky31 31.4 GHz sky brightness temperature(tbsky31) sky23 Total liquid water along LOS path(liq) Total water vapor along LOS path(vap) Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)

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DQRID : D070613.1

Start Date	Start Time	End Date	End Time
06/12/2007	0700	06/13/2007	2000
06/16/2007	2100	06/17/2007	2100

Subject:	TWP/MWR/C1 - Intermittent data
DataStreams:	twpmwrlosC1.b1, twpmwrtipC1.a1
Description:	After a computer change the MWR program did not restart properly. Data are intermittent between 6/12 and 6/17.
Measurements:	twpmwrtipC1.a1: 31bb tnd31 alt 31expave tipsky31 tbskytip31 bbn31 23expave Temperature, brightness, longwave(ir_temp) 23ndiode 31tipsky base_time airm actel 23tipskynd tnd23 31gain actaz r23 31tipbb wet_window 23bbn 23tbzenith 31bbn 31tipskynd tnd31I 31r tnd_nom23 23tipbb tknd tbskytip23 tc23 23bb tkbb1 tkbb2 23gain 23tipsky r31 liqtip bb31 tkxc tc31 tnd_nom31 tkbb tipn vaptip lon tnd23I time_offset tkair bbn23 31ndiode lat bb23 tipsky23 31tbzenith 23r twpmwrlosC1.b1: tkair IR Brightness Temperature(sky_ir_temp) lon actaz bbn23 Temperature, brightness, longwave(ir_temp) tnd31 Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) wet_window tnd_nom31 Total liquid water along LOS path(liq) tc31 lat tknd alt actel bb31 tnd_nom23 sky23 tkxc sky31 tc23 tkbb time_offset bbn31 bb23 31.4 GHz sky brightness temperature(tbsky31) tnd23 base_time Total water vapor along LOS path(vap)

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DQRID : D071208.1

Start Date	Start Time	End Date	End Time
11/21/2007	0000	12/11/2007	0355

Subject:	TWP/MWR/C1 - Incorrect ambient temperature readings
DataStreams:	twpmwrlosC1.b1, twpmwrtipC1.a1
Description:	Starting on 11/21 the ambient temperature readings are intermittent and have spikes. Site operators replaced the dew-blower on 12/11 and readings came back to normal
Measurements:	twpmwrtipC1.a1: tkair twpmwrlosC1.b1: tkair

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DQRID : D081013.2

Start Date	Start Time	End Date	End Time
09/01/2008	0000	09/30/2008	2359

Subject:	TWP/MWR/C1 - Short periods of wrong ambient temperature
DataStreams:	twpmwrlosC1.b1, twpmwrtipC1.a1
Description:	During this month there are a few intermittent instances of bad ambient temperature readings. I will summarize here these short time ranges: 20080909 between 02:00 and 03:00 UTC 20080909 between 09:00 and 14:00 UTC Additionally the ambient temperature has short but frequent data gaps. The data gaps are very short (less than one hour). Users could interpolate missing data or use alternative sensors such as the surface meteorological data available for the site.
Measurements:	twpmwrtipC1.a1: tkair twpmwrlosC1.b1: tkair

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DQRID : D090114.4

Start Date	Start Time	End Date	End Time
12/03/2008	1900	02/06/2009	0530

Subject:	TWP/MWR/C1 - Ambient temperature data missing
DataStreams:	twpmwrlosC1.b1, twpmwrtipC1.a1
Description:	The ambient temperature readings (tkair) suddenly failed. The sensor was replaced on Feb 6.
Measurements:	twpmwrtipC1.a1: tkair twpmwrlosC1.b1: tkair

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