 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] SOLLINGER          ]    PASS PROGRAM NOTE        ]     36176        ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] DEV/282-8461       ]      RELEASE NOTE( )        ] AUG. 1987        ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 19 AND SUBS               ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW (X)  GNC ( )  VU ( )  SM/PL ( )] G1, G2, G3                      ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: SPEC, UPLINK                                     ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SDEU, SULK                                     ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] TARGETING TIME-OF-IGNITION (TIG) AFFECTED BY MET UPDATE             ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ] THE GMT OF IGNITION IS COMPUTED AT THE TIME OF THE LOAD ITEM ENTRY  ]
 ] FROM THE DISPLAYED TIG (HRS, MIN, SEC) AND THE MET REFERENCE TIME   ]
 ] (I.E., THE GMT AT WHICH MET WAS ZERO). THE GMT OF IGNITION WILL BE  ]
 ] INCORRECT IN TWO SITUATIONS:                                        ]
 ]                                                                     ]
 ] A. THE GROUND MET AND ORBITER MET ARE DIFFERENT, SO THAT VOICE-     ]
 ]    LINKED TIG DATA ENTERED THROUGH THE DEU WILL NOT BE CONVERTED    ]
 ]    TO THE CORRECT GMT.                                              ]
 ]                                                                     ]
 ] B. AN MET UPDATE IS PERFORMED BETWEEN UPLINK OF TIG AND EXECUTION   ]
 ]    OF THE LOAD ITEM. THE GMT IN THE UPLINK DATA IS CONVERTED TO     ]
 ]    MET FOR DISPLAY, AND BACK TO GMT AT THE LOAD ITEM, USING THE     ]
 ]    MET REFERENCE TIME. IF THIS REFERENCE IS CHANGED BY AN MET       ]
 ]    UPDATE, THE GMT OF IGNITION WILL BE INCORRECT BY THE AMOUNT OF   ]
 ]    THE UPDATE.                                                      ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ] A. ASSURE THAT THE GROUND AND ORBITER MET ARE CONSISTENT (I.E.,     ]
 ]    SAME REFERENCE GMT TIME) AT MANUAL ENTRY OF THE TIG DATA.        ]
 ]                                                                     ]
 ] B. DO NOT UPDATE MET BETWEEN UPLINK OR MANUAL ENTRY OF THE TIG      ]
 ]    AND THE EXECUTION OF THE LOAD ITEM.                              ]
 ]                                                                     ]
 ] RECOVERY IN EACH CASE IS TO ENTER TIG (HR, MIN, SEC) WHICH ARE      ]
 ] CONSISTENT WITH THE MET AT THE POINT THE LOAD ITEM IS SELECTED,     ]
 ] EITHER MANUALLY ONBOARD OR BY UPLINK.                               ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: WYATT COOPER         DATE 8/4/88  ]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 8/10/88 ]                             ]
 ]    --------------------      ---------] JACK BOYKIN         8/17/88 ]
 ]PF MGR: MICHAEL BRIEDEN   DATE 8/8/88  ]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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