************************************  MAS-50 DATA EVALUATION  *********************************************
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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
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TAPE  #1:	         			      TAPE #2:
FILE #	  DATA TYPE  # BLKS	BEG/END TIME	      FILE #  DATA TYPE   # BLKS	BEG/END TIME
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  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
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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

				
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Additional Comments 
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LEVEL-1B NOTES 
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Level-1b processing needs to be modified so that tback is calculated from band 31 rather than band 45


PORT 4  INFORMATION  
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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
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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