 +_____________________________________________________________________
  AUTHOR:                                          DR:              
    TRENT METCALF        PASS PROGRAM NOTE            104651        
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  ORG/PHONE:          OPS NOTE (X)  USER NOTE ( )  DATE:  01/30/91  
   IBM/282-8436            RELEASE NOTE( )                          
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  OI/FLIGHT EFFECTIVITY:          USER AFFECTED:                     
     OI8F AND SUBS                CREW ( )  GROUND (X)  DUMP ONLY ( )
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         MAJOR SOFTWARE AREA:        OPS MODES AFFECTED:             
 SSW ( )  GNC (X)  VU ( )  SM/PL ( )    G6, G3                       
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  SOFTWARE SUB-AREA:  COMPILER                                        
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  PRINCIPAL FUNCTIONS:  RUNTIME LIBRARY                               
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  TITLE: EXTRANEOUS GPC ERRORS INITIATED BY COMPILER RUNTIME LIBRARY  
         ROUTINES                                                     
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  DESCRIPTION:                                                        
                                                                      
  DURING MM602, 603, 304 AND 305, IT IS POSSIBLE FOR A GPC ERROR      
  (GP 4 CODE 0A) TO BE LOGGED OUT OF THE ARCSIN LIBRARY ROUTINE       
  WHEN THE ORBITER IS DIRECTLY OVER A TACAN STATION.  THIS IS DUE     
  TO AN INPUT TO THE ARCSIN LIBRARY ROUTINE WHICH IS VERY CLOSE TO    
  1.  THE ROUTINE WILL RETURN THE CORRECT VALUE IN THIS CASE SO NO    
  ADVERSE EFFECTS WILL OCCUR OTHER THAN THE LOGGING OF THE GPC ERROR. 
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
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 USER RESPONSE:                                                       
                                                                      
  BE AWARE THAT AN EXTRANEOUS GPC ERROR MAY BE LOGGED IN THIS         
  SCENARIO.                                                           
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
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 CONCURRENCE:                           APPROVAL:                    
 IBM: PATTI A. THORNTON    DATE 02/12/91                             
     --------------------      ---------                             
 FDSD:   W. R. PRUETT      DATE 02/12/91                             
      -------------------      --------- DARRELL E. STAMPER 02/13/91 
 PF MGR:DAVID STEPHENSON   DATE 02/12/91------------------- -------- 
        -----------------      --------- CHAIRMAN, SASCB      DATE   
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