 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS: B17116      ]
 ] C. WANG            ]    BFS PROGRAM NOTE         ]                  ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] (213) 922-4858     ]      RELEASE NOTE ( )       ] 01/07/87 REV     ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]     OI8A AND SUBS             ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC(X) SEQ( ) SM/SP( ) IPL( )]1,3                      ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: DAP, ACTUATORS                                   ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038105/3.2.4.4                               ]
 ]_____________________________________________________________________]
 ] TITLE: INSERTION/DEORBIT OMS CMD TRANSIENTS                         ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] IN THE INSERTION/DEORBIT MODES, UPON TAKEOVER, BFS TRANSMITS THE    ]
 ] PREVIOUS OLD OMS PITCH AND YAW CMDS AS INITIAL CMDS AND THE NEW     ]
 ] UPDATED PITCH AND YAW CMDS A MINOR CYCLE LATER.  THE OMS CMD        ]
 ] TRANSIENTS HAVE A TIME DURATION OF 80 MILLISECONDS (TWO MINOR       ]
 ] CYCLES) AND THE TRANSIENT SPIKES ARE MORE PRONOUNCED IN MM 303      ]
 ] SINCE THE OMS ARE IN THE STOW POSITION.  THE TRANSIENT SPIKES       ]
 ] WHICH ARE PRODUCED BY THE BFS SOFTWARE GO INTO AN ELECTRO-          ]
 ] MECHANICAL OMS THRUST VECTOR CONTROL ACTUATOR INSTEAD OF A          ]
 ] HYDRAULIC ACTUATOR.  THEREFORE, RATE LIMITING OF THE OMS CMD IS     ]
 ] NOT REQUIRED.  THE ACTUATOR NOMINAL RATE LIMIT IS 5 DEG/SEC.        ]
 ] SINCE THE TIME DURATION IS 80 MILLISECONDS, THE OMS POSITION WILL   ]
 ] CHANGE A MAXIMUM OF 0.40 DEGREES.  THE TRANSIENT SPIKES, THEREFORE  ]
 ] ARE NOT DETRIMENTAL TO THE ACTUATOR AND DO NOT AFFECT THE PER-      ]
 ] FORMANCE OF THE SYSTEM OR VEHICLE.                                  ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ] THE USER SHOULD BE AWARE THAT WHEN BFS IS ENGAGED, WHEN OMS         ]
 ] COMMANDS ARE ACTIVE, THE OMS CMD AND POSITION STRIP CHART DATA      ]
 ] WILL SHOW OCCURRENCE OF TRANSIENT SPIKES.  THESE TRANSIENTS ARE     ]
 ] NOT VISIBLE ON THE CRT DISPLAY.                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI:<S> A. TROY            DATE 01/07/87]                             ]
 ] --------------------         ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 7/13/88 ]                             ]
 ] --------------------         ---------] RW MOOREHEAD        8/16/88 ]
 ]PF MGR: E J KIEBRAK       DATE 7/14/88 ]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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