1+_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] R. AVERY           ]    PASS PROGRAM NOTE        ]     46520        ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: AUG. 1987  ]
 ] IBM/282-8763       ]      RELEASE NOTE( )        ] REV B: 11/29/93  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI-02 AND SUBS                ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G6                              ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  ABORT, GUID                                     ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: 4.4                                            ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] PEG SLOW TO CONVERGE DURING FUEL DISSIPATION PHASE OF RTLS          ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] AFTER RTLS SELECTION (MM 601), POWERED EXPLICIT GUIDANCE (PEG) MAY  ]
 ] REMAIN UNCONVERGED FOR A PERIOD OF TIME. IY WILL OSCILLATE UNTIL    ]
 ] PEG CONVERGES. THE UNCONVERGENCE WILL BE SEEN BY THE GROUND AND     ]
 ] THE CREW, BUT THE IY OSCILLATION WILL BE TRANSPARENT TO THE CREW.   ]
 ]                                                                     ]
 ] ALSO, FOLLOWING RTLS INITIALIZATION, THE ADI NEEDLES MAY STOW       ]
 ] FOR APPROXIMATELY 14 SECONDS (7 CYCLES) BEFORE INDICATING           ]
 ] CONTINUOUS CONVERGENCE.  AT APPROXIMATELY THE SAME TIME, THE        ]
 ] GUID PARAMETER ON THE RTLS TRAJ DISPLAY WILL CHANGE FROM INIT       ]
 ] TO INHB.  WHEN PEG CONVERGES AND THE NEEDLES UNSTOW, THE            ]
 ] PARAMETER WILL SUBSEQUENTLY CHANGE FROM INHB TO A COMPUTED          ]
 ] MASS RATIO.                                                         ]
 ]                                                                     ]
 ] THESE OCCURRENCES ARE NOT UNUSUAL FOR TRAJECTORIES WITH AN ENGINE   ]
 ] OUT ON THE PAD. THE MORE LOFTED THE TRAJECTORY, THE LONGER THE      ]
 ] UNCONVERGENCY WILL LAST.                                            ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ]    NONE REQUIRED                                                    ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM:  HUGH D. STOVALL     DATE 01/06/94]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:   W. R. PRUETT      DATE 01/06/94]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 01/07/94 ]
 ]PF MGR:JOHN W. CRAFT,JR.  DATE 01/07/94]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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