DQRs for Session: 133205 User:rojCompleted: 02-12-2011

Data Quality Reports for Session: 133205 User: roj Completed: 02/12/2011

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D050310.3	TWP/MWR/C2 - Heater problem	twpmwrlosC2.b1, twpmwrtipC2.a1, twp5mwravgC2.c1
D050524.2	TWP/MWR/C2 - mixer temperature	twpmwrlosC2.b1, twpmwrtipC2.a1
D050725.10	TWP/MWR/C2 - Reprocessed: Revised Retrieval Coefficients	twpmwrlosC2.b1, twp5mwravgC2.c1, twpqmemwrcolC2.c1
D050928.2	TWP/MWR/C2 - New software version (4.15) installed	twpmwrlosC2.b1, twpmwrtipC2.a1
D061002.1	TWP/MWR/C2 - Missing data	twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1, twp5mwravgC2.c1
D061121.1	TWP/MWR/C2 - Missing Data	twpmwrlosC2.b1
D061213.3	TWP/MWR/C2 - Reprocessed: New Calibration coefficients	twpmwrlosC2.b1, twpmwrtipC2.a1
D070412.3	TWP/MWR/C1/C2 - Sun in the field of view	twpmwrlosC1.b1, twpmwrlosC2.b1, twpmwrtipC1.a1, twpmwrtipC2.a1
D081216.1	TWP/MWR/C2 - Incorrect ambient temperature during rain	twpmwrlosC2.b1, twpmwrtipC2.a1
D090417.3	TWP/MWR/C2 - Intermittent data	twpmwrlosC2.b1, twpmwrtipC2.a1

DQRID : D050310.3

Start Date	Start Time	End Date	End Time
02/04/2005	2340	03/14/2005	1650

Subject:	TWP/MWR/C2 - Heater problem
DataStreams:	twpmwrlosC2.b1, twpmwrtipC2.a1, twp5mwravgC2.c1
Description:	When the wiring of the air temperature sensor was checked the heater apparently began activating too often.
Measurements:	twpmwrtipC2.a1: wet_window twp5mwravgC2.c1: water_flag_fraction twpmwrlosC2.b1: wet_window

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DQRID : D050524.2

Start Date	Start Time	End Date	End Time
02/04/2005	2340	04/19/2005	0242

Subject:	TWP/MWR/C2 - mixer temperature
DataStreams:	twpmwrlosC2.b1, twpmwrtipC2.a1
Description:	When the wiring of the air temperature sensor was checked the mixer temperature unexpectedly decreased 4 degrees. It increased to its normal value when the dielectric window was replaced. The problem was probably caused by a loose and/or corroded connection.
Measurements:	twpmwrtipC2.a1: tkxc twpmwrlosC2.b1: tkxc

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DQRID : D050725.10

Start Date	Start Time	End Date	End Time
04/27/2002	0600	06/30/2005	2100

Subject:	TWP/MWR/C2 - Reprocessed: Revised Retrieval Coefficients
DataStreams:	twpmwrlosC2.b1, twp5mwravgC2.c1, twpqmemwrcolC2.c1
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.C2 20020427.0600. The MONORTM-based retrieval coefficients became active at TWP.C2 20050630.2100. Note: The TWP.C2 data for 19981028-20050630 have been reprocessed to apply the MONORTM-based retrievals for all time. The reprocessed data were archived 20061003.
Measurements:	twpqmemwrcolC2.c1: mean_vap_mwr mean_liq_mwr twp5mwravgC2.c1: Total liquid water along LOS path(liq) Total water vapor along LOS path(vap) twpmwrlosC2.b1: Total liquid water along LOS path(liq) Total water vapor along LOS path(vap)

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DQRID : D050928.2

Start Date	Start Time	End Date	End Time
11/01/2002	2101	09/15/2005	1424

Subject:	TWP/MWR/C2 - New software version (4.15) installed
DataStreams:	twpmwrlosC2.b1, twpmwrtipC2.a1
Description:	A problem began with the installation of MWR.EXE version 4.12 in November 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 9/15/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s.
Measurements:	twpmwrtipC2.a1: tipsky23 bbn31 tkair tkbb tnd_nom31 tkxc tnd31 bbn23 tc31 r23 tknd tnd23I bb31 tc23 tnd_nom23 tnd23 tnd31I r31 tipsky31 twpmwrlosC2.b1: tnd_nom23 Temperature, Sky Infra-Red(sky_ir_temp) tnd23 sky23 Total liquid water along LOS path(liq) bbn23 bb31 Temperature, brightness, longwave(ir_temp) tkbb tc23 Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) 31.4 GHz sky brightness temperature(tbsky31) sky31 tnd_nom31 tkxc tkair Total water vapor along LOS path(vap) tknd tnd31 bb23 bbn31 tc31

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DQRID : D061002.1

Start Date	Start Time	End Date	End Time
09/14/2006	1500	11/27/2006	1900

Subject:	TWP/MWR/C2 - Missing data
DataStreams:	twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1, twp5mwravgC2.c1
Description:	The heater blower assembly was causing the fuse to blow. The instrument was taken offline until a replacement arrives.
Measurements:	twpmwrtipC2.a1: tipsky23 tkair base_time tnd_nom31 tkxc actaz wet_window r23 tnd23I tc23 time_offset tnd_nom23 tnd23 lat r31 bb23 bbn31 tkbb bbn23 tnd31 tc31 tknd alt bb31 actel tnd31I lon tipsky31 twp5mwravgC2.c1: tbsky31_sdev Total liquid water along LOS path(liq) time_offset lat vap_sdev ir_temp_sdev Temperature, brightness, longwave(ir_temp) base_time Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) tbsky23_sdev alt water_flag_fraction lon 31.4 GHz sky brightness temperature(tbsky31) liq_sdev num_obs num_obs_irt Total water vapor along LOS path(vap) twpmwrC2.00: Raw data stream - documentation not supported twpmwrlosC2.b1: tnd23 sky23 Total liquid water along LOS path(liq) bbn23 tkbb tc23 tkxc tnd31 bbn31 base_time tnd_nom23 Temperature, Sky Infra-Red(sky_ir_temp) lat lon time_offset bb31 Temperature, brightness, longwave(ir_temp) actel wet_window Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) 31.4 GHz sky brightness temperature(tbsky31) sky31 tnd_nom31 tkair tknd Total water vapor along LOS path(vap) bb23 alt tc31 actaz

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DQRID : D061121.1

Start Date	Start Time	End Date	End Time
11/02/1998	2112	11/06/1998	2140
07/02/2000	2000	07/04/2000	0047
02/09/2002	2300	02/11/2002	2300
01/23/2004	1100	01/27/2004	1957
05/27/2005	1143	05/29/2005	2132

Subject:	TWP/MWR/C2 - Missing Data
DataStreams:	twpmwrlosC2.b1
Description:	Data are missing and unrecoverable.
Measurements:	twpmwrlosC2.b1: tnd_nom23 Temperature, Sky Infra-Red(sky_ir_temp) tnd23 lat sky23 Total liquid water along LOS path(liq) lon bbn23 time_offset bb31 Temperature, brightness, longwave(ir_temp) actel wet_window tkbb tc23 Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) sky31 31.4 GHz sky brightness temperature(tbsky31) tnd_nom31 tkxc tkair tknd Total water vapor along LOS path(vap) bb23 tnd31 bbn31 alt tc31 actaz base_time

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DQRID : D061213.3

Start Date	Start Time	End Date	End Time
11/27/2006	1900	11/30/2006	0700

Subject:	TWP/MWR/C2 - Reprocessed: New Calibration coefficients
DataStreams:	twpmwrlosC2.b1, twpmwrtipC2.a1
Description:	On 11/27 a spare radiometer was installed to replace a faulty radiometer. Once the radiometer started to collect data it used the default calibration coefficients until it collected enough tip data to determine its own coefficients. The data were reprocessed to apply corrected calibrations and the reprocessed data were archived 20061222.
Measurements:	twpmwrtipC2.a1: tc23 tnd_nom23 tnd_nom31 tnd23 tnd31 tc31 twpmwrlosC2.b1: tnd_nom23 tnd23 31.4 GHz sky brightness temperature(tbsky31) tnd_nom31 Total liquid water along LOS path(liq) Total water vapor along LOS path(vap) tnd31 tc31 tc23 Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)

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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

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 Total water vapor along LOS path(vap) Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) twpmwrlosC2.b1: 31.4 GHz sky brightness temperature(tbsky31) sky31 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 : D081216.1

Start Date	Start Time	End Date	End Time
10/09/2008	0100	01/09/2009	0300

Subject:	TWP/MWR/C2 - Incorrect ambient temperature during rain
DataStreams:	twpmwrlosC2.b1, twpmwrtipC2.a1
Description:	The ambient temperature was approximately 15 degree higher than what it should be when it was raining and the heater came. On Jan 9 2009 the dewblower was replaced which solved the problem. The increased ambient temperature (tkair) was happening during times of rain and users should always disregard MWR data during rain events. Therefore this DQR is colored transparent.
Measurements:	twpmwrtipC2.a1: tkair twpmwrlosC2.b1: tkair

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DQRID : D090417.3

Start Date	Start Time	End Date	End Time
03/06/2009	1600	03/14/2009	2200

Subject:	TWP/MWR/C2 - Intermittent data
DataStreams:	twpmwrlosC2.b1, twpmwrtipC2.a1
Description:	There are several short data gaps (usually 2 to 7 hours) in the data due to computer malfunction. The problem was solved by replacing the computer.
Measurements:	twpmwrtipC2.a1: tipsky23 tkair base_time tnd_nom31 tkxc actaz wet_window r23 tnd23I tc23 time_offset tnd_nom23 tnd23 lat r31 bb23 bbn31 tkbb bbn23 tnd31 tc31 tknd alt bb31 actel tnd31I lon tipsky31 twpmwrlosC2.b1: tnd23 sky23 Total liquid water along LOS path(liq) bbn23 tkbb tc23 tkxc tnd31 bbn31 base_time tnd_nom23 Temperature, Sky Infra-Red(sky_ir_temp) lat lon time_offset bb31 Temperature, brightness, longwave(ir_temp) actel wet_window Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23) sky31 31.4 GHz sky brightness temperature(tbsky31) tnd_nom31 tkair tknd Total water vapor along LOS path(vap) bb23 alt tc31 actaz

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END OF DATA