************************************  MAS-50 DATA EVALUATION  *********************************************
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FLIGHT: 98-067			DATE: 24 May 1998		AIRCRAFT NO. : 	809
SITE: Barrow ARM  		P.I.: King			T.O./LAND:  20:10/01:00
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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   1834      15:42:27-15:34:48	2	Data	    4028  00:12:24-00:23:10
  3       Data       88382      19:32:23-23:17:01
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PRE-FLIGHT CALIBRATION:
Time 15:19:16			 Comments:    (Lamps, voltage, name of *.rep file, compared with others)
Record: 500  	SL:  5647				
Temp1: 19.39	BB1: 16.46	Measured  over 20" hemisphere  - No black cloth available
Temp2: 20.22	BB2: 36.05	Data matches well with hemisphere test on 5/15/98 and 5/18/98 	 
Temp3: 19.02			Time code failure in the middle of pre-flight test	
Temp4: 26.11			   port 2 and a little better in port 3.
				

BEGINNING (tape 1):
Time 20:27:26			Comments: Clear sky over the over the Brooks Range 
Record: 2	SL: 13788 	Band 12 bb and head countslook good
Temp1: 14.96		   	Ports 1 2 and 3 look good      
Temp2: 15.90	BB1: -9.17	Port 4 disconnected for nitrogen purge  
Temp3: 10.04	BB2: 22.67		
Temp4: 25.78			     


Middle (tape 1):
Time 22:28:30			Comments: Near Barrow. multi-level cloud deck.
Record: 43500	SL: 57339 	Port 4 disconnected for nitrogen purge 
Temp1: 18.29		   	Port 3 video min is lower than the Head 1 and 2 count abd bb1 and 2   
Temp2: 17.58	BB1: -1.28	Normal absorbsion feature noise in chs 26,27,33,34 40 and 41    
Temp3: 13.89	BB2: 23.27	
Temp4: 25.74			
			     
					
END  (tape 1):
Time: 00:12:08			Comments:  Broken wispy clouds over Brooks Range
Record: 83383	SL: 98386			
Temp1: 18.54	BB1: -1.44	Normal absorbsion feature noise in chs 26,27,33,34 40 and 41
Temp2: 18.09	BB2: 23.35	
Temp3: 13.93			  
Temp4: 25.67


BEGINNING (tape 2):
Time 00:12:24			Comments: Multi-layered clouds over the Brooks Range 
Record: 1	SL: 97730 	Only 4028 lines on second tape
Temp1: 18.72		   	Ports 1 2 and 3 look good      
Temp2: 17.39	BB1: -0.87	Port 4 disconnected for nitrogen purge  
Temp3: 14.57	BB2: 23.29		
Temp4: 25.50			     
			
				   
				
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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
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For this flight the bb1 was driven even lower.  Don set is at 007 C. 
It again warmed as the flight progressed but not as much.
 

DATA LOSSES
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-  tape1.
scanline gap between records 1 and 2   scanlines 1-13788   times 20272746 20273581
scanline gap between records 2 and 3   scanlines 13788-13840   times 20273581 20273597
scanline gap between records 20 and 21   scanlines 13857-13860   times 20273903 20273919
scanline gap between records 77589 and 77590   scanlines 91428-91486   times 23552729 23552745
... reached end of media after record 83833 of file 2


 OVERALL QUALITY: Good			TOTAL DATA TIME: 5 hr 08 min