 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] J. ZOPHY           ]    PASS PROGRAM NOTE        ]      52111       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: AUG. 1987  ]
 ] IBM/282-8409       ]      RELEASE NOTE( )        ] REV A: 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, G8                          ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  ORBIT, DAP, ANNUNCIATION                        ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: 4.35, 4.91                                     ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] ORBIT DAP VERNIER DOWNMODE ANNUNCIATION                             ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] VERNIER RCS JET CONTROL IS ALLOWED TO CONTINUE FOLLOWING FAILURE    ]
 ] OF ANY JET: IF A SIDEFIRING VERNIER JET (L5L, R5R) FAILS, NO MODE   ]
 ] CHANGES WILL OCCUR. IF A DOWNFIRING VERNIER JET (L5D, R5D, F5L,     ]
 ] F5R) FAILS DURING VERNIER CONTROL, THE DAP WILL AUTOMATICALLY       ]
 ] DOWNMODE TO MANUAL ROTATIONAL PULSE SUBMODE IN ALL THREE AXES. IF   ]
 ] A DOWNFIRING VERNIER JET FAILS DURING PRIMARY OR ALTERNATE CONTROL, ]
 ] THE DOWNMODE WILL NOT OCCUR UNTIL THE NEXT TIME VERNIER JET CONTROL ]
 ] IS SELECTED.                                                        ]
 ]                                                                     ]
 ] THE MESSAGE "DAP RECONF" IS OUTPUT ON THE CRT ANNUNCIATION LINE     ]
 ] WHENEVER A DOWNFIRING VERNIER JET FAILS. THE INTENT OF THE MESSAGE  ]
 ] IS TO PROVIDE THE CREW WITH AN INDICATION WHENEVER A VERNIER        ]
 ] DOWNMODE OCCURS. HOWEVER, THE ACTUAL REQUIREMENTS SPECIFY THAT THE  ]
 ] MESSAGE SHOULD APPEAR WHEN A DOWNFIRING VERNIER JET FAILS (IS       ]
 ] DESELECTED BY RCS RM), AND NOT BE RE-ANNUNCIATED UNLESS THE FAILURE ]
 ] IS RESET AND RE-OCCURS. THEREFORE, THE MESSAGE WILL EXHIBIT THE     ]
 ] FOLLOWING BEHAVIORS:                                                ]
 ]                                                                     ]
 ] A. IF THE DOWNFIRING VERNIER JET IS DESELECTED BY RM WHILE IN       ]
 ]    PRIMARY OR ALT JET CONTROL, THE MESSAGE WILL APPEAR IMMEDIATELY. ]
 ]    NO DOWNMODE WILL OCCUR AT THE TIME OF THE FAILURE. THE DOWNMODE  ]
 ]    WILL OCCUR UPON SELECTION OF VERNIER JET CONTROL; NO NEW         ]
 ]    MESSAGE WILL ACCOMPANY THE DOWNMODE.                             ]
 ]                                                                     ]
 ] B. IF, SUBSEQUENT TO A DOWNMODE, THE DAP IS MODED TO OTHER THAN     ]
 ]    MANUAL, ROTATIONAL PULSE SUBMODE, AND CONTROL IS CHANGED FROM    ]
 ]    VERNIER TO PRIMARY OR ALT, THE DAP WILL DOWNMODE IMMEDIATELY IF  ]
 ]    VERNIER JETS ARE RESELECTED, BUT NO NEW MESSAGE WILL ACCOMPANY   ]
 ]    THE NEW DOWNMODE.                                                ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 @




 +_____________________________________________________________________
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ] J. ZOPHY           ]    PASS PROGRAM NOTE        ]      52111       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: AUG. 1987  ]
 ] IBM/282-8409       ]      RELEASE NOTE( )        ] REV A: 09/27/90  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ] ORBIT DAP VERNIER DOWNMODE ANNUNCIATION                             ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ] BE AWARE OF THE FUNCTION OF THE "DAP RECONF" MESSAGE: IT SIMPLY     ]
 ] INDICATES THAT A DOWNFIRING VERNIER JET FAILED AT THE TIME          ]
 ] ASSOCIATED WITH THE MESSAGE. ALSO, ONCE THE MESSAGE APPEARS,        ]
 ] EXPECT A DOWNMODE TO OCCUR EVERY TIME A PRIMARY-TO-VERNIER          ]
 ] OR ALT-TO-VERNIER TRANSITION IS MADE.                               ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: PATTI A. THORNTON    DATE 10/30/90]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD: ROBERT N. HINSON    DATE 11/01/90]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 11/09/90 ]
 ]PF MGR: K. L. LINDSAY     DATE 11/07/90]------------------- -------- ]
 ]        JOHN APPLEWHITE        11/08/90] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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