 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS:B27615       ]
 ] C.E. PRICE         ]    BFS PROGRAM NOTE         ] DR: 105528       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: 3/6/90     ]
 ] RI/922-5196        ]      RELEASE NOTE ( )       ]                  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI8B AND SUBS                 ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC(X) SEQ( ) SM/SP( ) IPL( )] OPS 3                   ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  GUID                                            ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038104 / 3.2.3.1.10.5 & 3.2.3.1.10.11        ]
 ]_____________________________________________________________________]
 ] TITLE: DEORBIT GUIDANCE ANOMALIES FOR FUEL WASTING BURNS            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION: FOR DEORBIT BURNS REQUIRING ONLY A SMALL AMOUNT OF     ]
 ] OUT-OF-PLANE FUEL WASTING, THE DESIRED THRUST DIRECTION, LAMC,      ]
 ] COMPUTED DURING THE LOAD SOLUTION MAY BE BASED ON AN UNCONVERGED    ]
 ] GUIDANCE SOLUTION. THE TRANS DAP USES LAMC TO DETERMINE THE DESIRED ]
 ] PRE-BURN ATTITUDE. LAMC ALSO DRIVES THE ADI ATTITUDE ERRORS.        ]
 ] HOWEVER, THE VELOCITY-TO-BE-GAINED VECTOR, VGO, THAT IS SENT TO THE ]
 ] OMS MANEUVER DIP IS BASED ON THE FINAL CONVERGED SOLUTION.          ]
 ]                                                                     ]
 ]                                                                     ]
 ]---------------------------------------------------------------------]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ]  THE GROUND FLIGHT SUPPORT, AS PART OF DEORBIT PLANNING, WILL NOTIFY]
 ]  THE CREW OF THE EXPECTED FLUCTUATIONS IN THE Y-BODY COMPONENT OF   ]
 ]  VGO THAT WILL BE SEEN ON THE MANEUVER DISPLAY BETWEEN TIG-15 AND   ]
 ]  TIG.                                                               ]
 ]                                                                     ]
 ]  FOR BFS PRE-ENGAGED, THE CREW WILL ALSO BE ADVISED OF APPROXIMATE  ]
 ]  MAGNITUDE AND DURATION (ABOUT 20 SECONDS) OF THE EXPECTED ADI      ]
 ]  YAW NEEDLE DEFLECTION AT TIG AS WELL AS ANY REQUIRED ACTION ON     ]
 ]  THEIR PART. THE CREW MAY CONSIDER AN APPROPRIATE ADI SENSITIVITY   ]
 ]  SELECTION BASED UPON THE EXPECTED ADI YAW ERROR.                   ]
 ]                                                                     ]
 ]  FOR BFS ENGAGED, THE CREW WILL ALSO BE ADVISED OF THE APPROXIMATE  ]
 ]  MAGNITUDE OF THE EXPECTED ADI YAW NEEDLE DEFLECTION PRIOR TO TIG   ]
 ]  AND TO WAIT UNTIL TIG TO BEGIN FLYING THE YAW INDICATIONS.         ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI: <S> C. PURTELL        DATE 03/08/90]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD:   W. R. PRUETT       DATE 04/03/90]                             ]
 ]    --------------------      ---------] S. N. HARDEE, JR.  04/03/90 ]
 ]PF MGR:MOISES N. MONTEZ   DATE 04/03/90]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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