D Q R Report

Start Date	Start Time	End Date	End Time	Data Quality Metric
02/12/1994	0000	01/12/1999	2359	Does not affect quality
04/01/1995	0000	01/12/1999	2359	Does not affect quality
07/21/1993	1406	01/12/1999	2359	Does not affect quality

At 00:00 GMT on 7 January version 3.27 of the MWR operating program was installed and made operational at the SGP central facility (C1). No problems were noted over the next few days and the boundary facility MWRs (B1, B4, B5, B6) were upgraded at 20:00 GMT on 11 January. This version includes a beam width correction I developed as well as providing the capability to automatically level the elevation mirror (that is, to automatically detect and correct offsets in the elevation angle stepper motor position.) On 12 January I discovered that the '486-based MWR computers at B1, B4 and B6 were not executing the system command to move and rename the data files so that the ARM data system could retrieve them. Reducing the length of the storage arrays in the auto-leveling feature from 1000 to 250 resolved the problem. This results in the auto-leveling being based on only 4 hours of clear sky data rather than 16 hours at B5 and C1. This version of the program is 3.28. Version 3.27 (running at B5 and C1) can be installed if and when these computers are upgraded to Pentium-class machines. The improvement in the quality of the tip curves resulting from the auto-leveling has been dramatic: differences in the brightness temperatures at 3 airmasses (19.5 and 160.5 degrees) have been reduced from +/- 5 K to +/- 0.5 K. The goodness-of-fit coefficient for the tip curves has improved from about 0.995 to over 0.998. In order to take full advantage of this improvement to detect and reject cloudy tip curves, the minimum value of the goodness-of-fit coefficient for a valid tip curve has been increased from 0.995 to 0.998. Editor's Note: The SGP.C1 data were reprocessed in 2004 to produce a common DOD for all time. The 1996-1998 data reprocessing included beam width and mirror-leveling corrections, but the data prior to that range did not have these corrections applied.

Subject:	SGP/MWR/B1/B4/B5/B6/C1 - software upgrade (version 3.27)
DataStreams:	sgpmwrlosB4.a1, sgpmwrtipB6.a0, sgpmwrtipB5.a0, sgpmwrlosB5.a1, sgpmwrlosC1.b1, sgpmwrtipB4.a0, sgpmwrtipB1.a0, sgpmwrlosB6.a1, sgpmwrlosB1.a1, sgpmwrlosC1.a1
Description:	At 00:00 GMT on 7 January version 3.27 of the MWR operating program was installed and made operational at the SGP central facility (C1). No problems were noted over the next few days and the boundary facility MWRs (B1, B4, B5, B6) were upgraded at 20:00 GMT on 11 January. This version includes a beam width correction I developed as well as providing the capability to automatically level the elevation mirror (that is, to automatically detect and correct offsets in the elevation angle stepper motor position.) On 12 January I discovered that the '486-based MWR computers at B1, B4 and B6 were not executing the system command to move and rename the data files so that the ARM data system could retrieve them. Reducing the length of the storage arrays in the auto-leveling feature from 1000 to 250 resolved the problem. This results in the auto-leveling being based on only 4 hours of clear sky data rather than 16 hours at B5 and C1. This version of the program is 3.28. Version 3.27 (running at B5 and C1) can be installed if and when these computers are upgraded to Pentium-class machines. The improvement in the quality of the tip curves resulting from the auto-leveling has been dramatic: differences in the brightness temperatures at 3 airmasses (19.5 and 160.5 degrees) have been reduced from +/- 5 K to +/- 0.5 K. The goodness-of-fit coefficient for the tip curves has improved from about 0.995 to over 0.998. In order to take full advantage of this improvement to detect and reject cloudy tip curves, the minimum value of the goodness-of-fit coefficient for a valid tip curve has been increased from 0.995 to 0.998. Editor's Note: The SGP.C1 data were reprocessed in 2004 to produce a common DOD for all time. The 1996-1998 data reprocessing included beam width and mirror-leveling corrections, but the data prior to that range did not have these corrections applied.
Suggestions:
Measurements:	sgpmwrlosB4.a1: 31tbsky 23tbsky vap liq more sgpmwrtipB1.a0: 31tipsky 23tipsky more sgpmwrtipB4.a0: 31tipsky 23tipsky more sgpmwrtipB5.a0: 31tipsky 23tipsky more sgpmwrtipB6.a0: 31tipsky 23tipsky more sgpmwrlosC1.a1: tbsky23 vap tbsky31 liq more sgpmwrlosB1.a1: 31tbsky 23tbsky vap liq more sgpmwrlosB5.a1: liq 23tbsky 31tbsky vap more sgpmwrlosC1.b1: vap liq tbsky31 tbsky23 more sgpmwrlosB6.a1: liq 31tbsky vap 23tbsky more