 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] L. GILCHRIST       ]    PASS PROGRAM NOTE        ]     36479        ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: AUG. 1987  ]
 ] VER/282-7067       ]      RELEASE NOTE( )        ]                  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 19 AND SUBS               ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G3                              ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: TRANSITIONS, ENTRY, SPEC, DISP                   ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: 6.21, 6.35, 4.211                              ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] TRANSITION FROM 303 TO 301 IMMEDIATELY AFTER STATE VECTOR UPDATE    ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] IF CREW TRANSITIONS FROM 303 TO 301 WHILE PROGRAM GZY IS ACTIVE     ]
 ] (I.E., IMMEDIATELY AFTER A WHOLE STATE VECTOR UPDATE OR HORIZ SIT   ]
 ] DISPLAY DELTA STATE VECTOR UPDATE IS PERFORMED), THE FOLLOWING MNVR ]
 ] DISPLAY ANOMALIES MAY OCCUR:                                        ]
 ]                                                                     ]
 ] A. LOAD ITEM OR TARGET ITEMS MAY BE INCORRECTLY REJECTED DURING     ]
 ]    INITIAL PERIOD OF 301 (WHILE GZY IS ACTIVE).                     ]
 ]                                                                     ]
 ] B. CRT TIMER MAY BE ACTIVATED IN 301, AT COMPLETION OF GZY, AT      ]
 ]    SAME TIME LOAD IS FLASHING. (REQUIREMENTS SAY CRT TIMER SHOULD   ]
 ]    SHOULD BE DEACTIVATED IF LOAD IS FLASHING).                      ]
 ]                                                                     ]
 ] GZY IS SCHEDULED IN 303, WHENEVER A WHOLE VECTOR IS UPLINKED OR A   ]
 ] DELTA STATE UPDATE IS MADE ON THE HORIZ SIT DISPLAY, TO PERFORM     ]
 ] THE FOLLOWING FUNCTIONS:                                            ]
 ]                                                                     ]
 ]  + COMPUTE RANGE TO LANDING SITE AT ENTRY INTERFACE.                ]
 ]  + COMPUTE TIME OF FREE FALL.                                       ]
 ]  + ACTIVATE CRT TIMER COUNTDOWN TO ENTRY INTERFACE.                 ]
 ]                                                                     ]
 ] SINCE GZY IS ALSO USED TO PERFORM MANEUVER TARGETING (WHEN          ]
 ] SCHEDULED IN 301 AND 302), TARGET AND LOAD ITEMS ARE REJECTED       ]
 ] WHILE GZY IS ACTIVE IN 301 OR 302 CAUSING THE FIRST OF THE          ]
 ] PREVIOUSLY DESCRIBED PROBLEMS.                                      ]
 ]                                                                     ]
 ] DURING 301 INITIALIZATION, LOAD STARTS FLASHING AND CRT TIMER IS    ]
 ] DEACTIVATED, BUT IF GZY IS ACTIVE DURING 301 AND DOES NOT FINISH    ]
 ] UNTIL AFTER 301 INITIALIZATION, IT WILL ACTIVATE CRT TIMER CAUSING  ]
 ] THE SECOND OF THE PREVIOUSLY DESCRIBED PROBLEMS.                    ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]---------------------------------------------------------------------]
 @



 DR36479
 +_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ] L. GILCHRIST       ]    PASS PROGRAM NOTE        ]     36479        ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: AUG. 1987  ]
 ] VER/282-7067       ]      RELEASE NOTE( )        ]                  ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] TRANSITION FROM 303 TO 301 IMMEDIATELY AFTER STATE VECTOR UPDATE    ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ] A. DO NOT TRANSITION TO 301 IF A WHOLE VECTOR UPLINK OR AN HS       ]
 ]    DISPLAY DELTA STATE UPDATE HAS JUST BEEN PERFORMED.              ]
 ]                                                                     ]
 ] B. IF AN ACCIDENTAL TRANSITION TO 301 IS DONE WHILE GZY IS ACTIVE:  ]
 ]                                                                     ]
 ]    + TRY ENTERING TARGET ITEMS UNTIL THEY ARE ACCEPTED (THEY WILL   ]
 ]      BE ACCEPTED WHEN CRT TIMER STARTS COUNTING DOWN IN 301).       ]
 ]                                                                     ]
 ]    + DEACTIVATE CRT TIMER BY ENTERING A TARGET ITEM OR THE LOAD     ]
 ]      ITEM.                                                          ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: WYATT COOPER         DATE 9/20/88 ]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 9/20/88 ]                             ]
 ]    --------------------      ---------] JACK G BOYKIN       9/22/88 ]
 ]PF MGR: GEORGE BULL JR    DATE 9/14/88 ]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
 @




