************************************ MAS-50 DATA EVALUATION ********************************************* ----------------------------------------------------------------------------------------------------------- FLIGHT: 98-065 DATE: 20 May 1998 AIRCRAFT NO. : 809 SITE: Barrow ARM & Sheba Site P.I.: King T.O./LAND: 19:05/01:35 ----------------------------------------------------------------------------------------------------------- TAPE #1: TAPE #2: FILE # DATA TYPE # BLKS BEG/END TIME FILE # DATA TYPE # BLKS BEG/END TIME ----------------------------------------------------------------------------------------------------------- 1 HEADER 1 N/A / N/A 1 HEADER 1 N/A / N/A 2 Preflight 1858 15:42:27-15:34:48 2 DATA 33375 23:17:15-00:40:37 3 Data 85663 19:32:23-23:17:01 ----------------------------------------------------------------------------------------------------------- PRE-FLIGHT CALIBRATION: Time 15:31:36 Comments: (Lamps, voltage, name of *.rep file, compared with others) Record: 1000 Temp1: 20.55 BB1: 16:42 Measured over 20" hemisphere - No black cloth available Temp2: 22.04 BB2: 36.18 Data matches well with hemisphere test on 5/15/98 and 5/18/98 Temp3: 19.49 Temp4: 26.49 BEGINNING (tape 1): Time 19:32:23 Comments: Another outstanding image of the Brooks Range Record: 1 SL: 15075 Band 12 bb and head counts considerably lower that video min, Temp1: 13.12 This will cause severe zero radiances Temp2: 13.47 BB1:-11.29 Port 4 disconnected for nitrogen purge Temp3: 7.90 BB2: 23.04 Temp4: 25.87 Middle (tape 1): Time 20:44:33 Comments: Near Barrow. Flat field of ...snow/ice? (-3.0 C) GIF??? Record: 14500 SL: 29437 Port 4 disconnected for nitrogen purge Temp1: 16.30 Port 3 video min is lower than the Head 1 and 2 count Temp2: 15.00 BB1: -3.66 Normal absorbsion feature noise in chs 26,27,33,34 40 and 41 Temp3: 11.72 BB2: 34.27 Odd 1 or 2 pixel vertical striping noticed in bands 14,15,16 and 31-41 Temp4: 25.75 END (tape 1): Time: 23:17:01 Comments: more sea ice Record: 83785 SL: 76271 Port 3 is very noisy Temp1: 20.22 BB1: -0.19 Normal absorbsion feature noise in chs 26,27,33,34 40 and 41 Temp2: 19.57 BB2: 23.82 Odd 1 or 2 pixel vertical striping noticed in bands 14,15,16 and 31-41 Temp3: 10.38 occurs at pixel 429 492 and 577 and is correlated on all the bands. Temp4: 25.81 BEGINNING (tape 2): Time 23:17:15 Comments: Clear sky over broken ice Record: 1 SL: 98984 Port 4 disconnected for nitrogen purge. Temp1: 20.20 BB1: -0.18 Port 3 very noisey - flat field of ice? Dynamic range less than 100 cts. Temp2: 19.56 BB2: 23.82 BB count spread 100 - 1000 Temp3: 15.44 Temp4: 25.94 END (tape 2): Time: 00:40:37 Broken clouds over the Brooks range. Port 3 looks much better over Record:33375 SL: 132437 brighter targets. Temp1: 20.75 BB1: 0.37 Port 4 disconnected for nitrogen purge. Temp2: 20.22 BB2: 23.87 Odd 1 or 2 pixel vertical striping noticed in bands 14,15,16 and 31-41 Temp3: 15.97 Temp4: 25.98 ----------------------------------------------------------------------------------------------------------- Additional Comments ----------------------------------------------------------------------------------------------------------- LEVEL-1B NOTES ----------------------------- Level-1b processing needs to be modified so that tback is calculated from band 31 rather than band 45 PORT 4 INFORMATION ----------------------------- Port 4 disconnected for nitrogen purge. INSTRUMENT TEMPERATURE ---------------------- For this flight the bb1 was driven to a lower temperature, but it warmed as the flight progressed. Minco looks likes it worked exceedingly well. Very stable. It looks like the MAS actually warmed up a bit through the flight. DATA LOSSES ----------- We have a few more scanline gaps than the last flights - tape1. scanline gap between records 1 and 2 scanlines 1-15075 times 19322437 19323272 scanline gap between records 2 and 3 scanlines 15075-15127 times 19323272 19323288 scanline gap between records 20 and 21 scanlines 15144-15147 times 19323593 19323609 scanline gap between records 5738 and 5739 scanlines 20864-20876 times 19475585 19475601 scanline gap between records 20705 and 20706 scanlines 35842-35854 times 20280136 20280152 scanline gap between records 77540 and 77541 scanlines 92688-92738 times 23001945 23001961 ... reached end of media after record 83784 of file 2 - tape2 scanline gap between records 2 and 3 scanlines 98985-99070 times 23171680 23171696 ... reached end of media after record 33375 of file 2 OVERALL QUALITY: Good TOTAL DATA TIME: 5 hr 08 min