 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] T. TALBERT         ]    PASS PROGRAM NOTE        ]     14460        ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: SEPT. 1987 ]
 ] ENG/282-8453       ]      RELEASE NOTE( )        ] REV A: 12/18/90  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 19 AND SUBS               ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G3                              ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: DOWNLIST, TARGET                                 ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: 4.211                                          ]
 ]_____________________________________________________________________]
 ] TITLE:  VGO-DISP DOWNLISTED INCORRECTLY DURING DEORBIT MANEUVER     ]
 ]         TARGETING                                                   ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] THE VELOCITY TO GO IN BODY COORDINATES (VGO-DISP) MAY BE DOWNLISTED ]
 ] INCORRECTLY WHILE DEORBIT MANEUVER TARGETING FOR A PEG 7 LOAD IS IN ]
 ] PROGRESS.  THE TARGETING ROUTINE INITIALLY COMPUTES A VGO-DISP AS   ]
 ] THE VELOCITY TO GO IN M50 COORDINATES; AT THE CONCLUSION OF         ]
 ] TARGETING, VGO-DISP IS CORRECTLY COMPUTED AS THE VELOCITY TO GO IN  ]
 ] BODY COORDINATES.  IF VGO-DISP IS DOWNLISTED BETWEEN THESE TWO      ]
 ] CALCULATIONS, A MISLEADING VALUE COULD BE OBSERVED.                 ]
 ]                                                                     ]
 ] NOTE THAT WHILE TARGETING IS IN PROGRESS, VGO-DISP IS OF LITTLE     ]
 ] INTEREST.  DURING THIS PERIOD, VGO-DISP (WHICH IS ALSO DISPLAYED ON ]
 ] THE MANEUVER DISPLAY) IS BLANKED ON THE DISPLAY.  IT IS ONLY AFTER  ]
 ] THE COMPLETION OF TARGETING THAT VGO-DISP IS AGAIN DISPLAYED AND    ]
 ] BECOMES USEFUL AS THE VELOCITY TO GO FOR THE UPCOMING MANEUVER.     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]                                                                     ]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ] IGNORE THE DOWNLISTED VGO-DISP WHILE PEG 7 DEORBIT TARGETING IS     ]
 ] IN PROGRESS.                                                        ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: PATTI A. THORNTON    DATE 02/04/91]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:  W. R. PRUETT       DATE 02/07/91]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 02/12/91 ]
 ]PF MGR:  M. N. MONTEZ     DATE 02/12/91]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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