 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] J. ZOPHY           ]    PASS PROGRAM NOTE        ]      55325       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: AUG. 1987  ]
 ] IBM/282-8409       ]      RELEASE NOTE( )        ] REV B: 09/27/90  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI20 AND SUBS                 ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G2                              ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: RCS, SPEC, ORBIT                                 ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: 4.35, 4.158                                    ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] QBI SNAPSHOT AT END OF MANUAL BURN                                  ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] IF IN MM202 AND ITEM 27 (MNVR ITEM) IS ENTERED DURING AN RCS        ]
 ] MANUAL MODE (INRTL, LVLH, OR FREE DRIFT), AND THE OMS BURN IS       ]
 ] STARTED AND ENDED IN MANUAL INRTL MODE (MODING FROM LVLH OR FREE    ]
 ] DRIFT TO INRTL AT THE START OF THE BURN IS AUTOMATIC),              ]
 ] THEN THE REQUIRED QBI SNAPSHOT WILL NOT OCCUR AS EXPECTED AT THE    ]
 ] CREW-INDUCED TVC-TO-RCS TRANSITION (I.E., END OF OMS BURN WHEN      ]
 ] ARM/PRESS SWITCHES TOGGLED TO OFF).                                 ]
 ]                                                                     ]
 ] AS A CONSEQUENCE, THE ADI ERROR NEEDLES WILL NOT BE ZEROED AT THE   ]
 ] TVC MANUAL INRTL TO RCS MANUAL INRTL MODE TRANSITION.               ]
 ]                                                                     ]
 ] IF EITHER OF THE FOLLOWING BURN                                     ]
 ] SCENARIOS OCCURRED BEFORE LAST EXITING MM202:                       ]
 ]                                                                     ]
 ] A. FOR AN RCS BURN, THE DAP WAS NOT IN THE AUTO MODE FROM THE TIME  ]
 ]    THE MNVR ITEM WAS EXECUTED UNTIL MM202 WAS EXITED                ]
 ]                                                                     ]
 ] B. FOR AN OMS BURN, THE DAP WAS NOT IN THE AUTO MODE FROM THE TIME  ]
 ]    THE MNVR ITEM WAS EXECUTED UNTIL TIG, NOR FROM CUTOFF UNTIL      ]
 ]    THE TRANSITION OUT OF MM202                                      ]
 ]                                                                     ]
 ] AN UNEXPECTED MANEUVER MAY OCCUR UPON REENTERING                    ]
 ] MM202 IN AUTO OR SELECTING AUTO (BEFORE EXECUTING A MNVR ITEM)      ]
 ] AFTER REENTERING MM202 IN A MANUAL MODE.                            ]
 ]                                                                     ]
 ] THIS SITUATION WAS FORMERLY OPS NOTE 45214.                         ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 @




 +_____________________________________________________________________
 ]                       SUPPLEMENTAL SHEET                            ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ] J. ZOPHY           ]    PASS PROGRAM NOTE        ]    55325         ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: AUG. 1987  ]
 ] IBM/282-8409       ]      RELEASE NOTE( )        ] REV B: 09/27/90  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ] QBI SNAPSHOT AT END OF MANUAL BURN                                  ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ] 1. TO PREVENT THE ABOVE PROBLEM, IF AN ITEM 27 IS ENTERED DURING    ]
 ]    AN RCS MANUAL MODE, MODE TO AUTO (USING AUTO PBI) BEFORE         ]
 ]    STARTING THE OMS BURN.                                           ]
 ]                                                                     ]
 ] 2. TO RECOVER FROM THE PROBLEM (AFTER AN ITEM 27 WAS ENTERED IN AN  ]
 ]    RCS MANUAL MODE AND THE OMS BURN IS STARTED AND ENDED IN MANUAL  ]
 ]    INRTL MODE, REGARDLESS OF THE DAP TRANSITIONS DURING THE BURN)   ]
 ]    MODE TO AUTO TO CORRECTLY RESET THE PREBURN MANEUVER             ]
 ]    FLAG, THEN TO A MANUAL MODE, THEN TO AUTO TO SNAPSHOT QBI.       ]
 ]                                                                     ]
 ] 3. TO PREVENT A POSSIBLE UNDESIRED MANEUVER AFTER REENTERING        ]
 ]    MM202, EITHER SELECT AUTO AT SOMETIME AFTER A BURN BEFORE        ]
 ]    LEAVING MM202 OR TRANSITION OUT OF MM201 TO SOME OTHER OPS       ]
 ]    (OPS 8) BEFORE REENTERING MM202. THE UNDESIRED MANEUVER CAN      ]
 ]    BE INTERRUPTED BY SELECTING A MANUAL MODE.                       ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: PATTI A THORNTON     DATE 10/09/90]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:   SAM ANKNEY        DATE 10/10/90]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 10/31/90 ]
 ]PF MGR:  K. L. LINDSAY    DATE 10/30/90]------------------- -------- ]
 ]         M. N. MONTEZ          10/31/90] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
 @
