 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS:B27702       ]
 ]  C. E. PRICE       ]    BFS PROGRAM NOTE         ] DR: 106261       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] RI/DNY X5196       ]      RELEASE NOTE ( )       ]    8-4-92        ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]       OI 20 AND SUBS          ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC(X) SEQ( ) SM/SP( ) IPL( )]    1 & 3                ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  GUID, DISP                                      ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038104/3.2.3.1.10.11.3.2                     ]
 ]_____________________________________________________________________]
 ] TITLE: BFS MANEUVER BURN ATTITUDE IS INCORRECT                      ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION: FOR CASES WHERE THE DESIRED VEHICLE BURN ATTITUDE IS   ]
 ] VERY CLOSE TO +/- 90 DEGREES IN YAW, THEN THERE IS NO VALID BURN    ]
 ] ATTITUDE INFORMATION ON THE MANEUVER DISPLAY. THE ADI ERROR NEEDLES ]
 ] ONLY PROVIDE +/- 5 DEGREES OF DEFLECTION AND THEREFORE FOR LARGE    ]
 ] ATTITUDE EXCURSIONS DO NOT PROVIDE ENOUGH INFORMATION TO DO AN      ]
 ] EFFICIENT (MANUAL) MANEUVER TO THE DESIRED BURN ATTITUDE.           ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ] 1. MANEUVER THE VEHICLE IN ROLL TO ACHIEVE AN ATTITUDE OF 0, 90,    ]
 ]    180, OR 270 DEGREES ON THE ADI BALL - SELECT THE DESIRED ATT.    ]
 ]    THAT IS CLOSEST TO THE INITIAL ATTITUDE IN ORDER TO MINIMIZE     ]
 ]    PROPELLANT CONSUMPTION.                                          ]
 ]                                                                     ]
 ] 2. USE VEHICLE YAW OR PITCH JETS TO ACHIEVE A VEHICLE ATTITUDE      ]
 ]    OF +/- 90 DEGREES IN YAW AS SHOWN ON THE ADI BALL. USE THE YAW   ]
 ]    ADI ERROR NEEDLE TO SELECT THE CORRECT POLARITY.                 ]
 ]                                                                     ]
 ] 3. NULL OUT ROLL ERROR NEEDLE.                                      ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI: <S> J. AGRES          DATE 08/21/92]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:  ROBERT N. HINSON   DATE 10/20/92]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 10/30/92 ]
 ]PF MGR:  GENE MCSWAIN     DATE 10/28/92]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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