 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS:  B07351     ]
 ] G.T. NOZAKI        ]    BFS PROGRAM NOTE         ]                  ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] RI/DNY X1921       ]      RELEASE NOTE ( )       ] 09/16/81         ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]  11.24C AND SUBS              ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC(X) SEQ( ) SM/SP( ) IPL( )] 1,3                     ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  ACTUATORS, DISPLAY, KEYBOARD                    ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038106/3.2.5.5.7                             ]
 ]_____________________________________________________________________]
 ] TITLE:  OMS ZAP CMD AT BFS ENGAGE                                   ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]  IN THE INSERTION/DEORBIT PHASES, WHEN THE PRIMARY/SECONDARY        ]
 ]  ACTUATOR SELECTION IS PERFORMED VIA THE MNVR DISPLAY (ITEMS 28-33) ]
 ]  EITHER BY DK LISTEN OR BFS KYBD PRIOR TO ENGAGEMENT THE ZAP CMD IS ]
 ]  ACTIVATED.  UPON BFS TAKEOVER, THE ZAP CMD WILL BE EXECUTED AND    ]
 ]  TURNED "OFF" BY THE OMS_TVC_CMD_HIP TWO MINOR CYCLE (80            ]
 ]  MILLISECONDS) LATER, RESULTING IN AN OMS GIMBAL MOVEMENT WHICH     ]
 ]  APPEARS AS A TRANSIENT ON THE OMS ACTUATOR.  THE TRANSIENT WHICH   ]
 ]  IS PRODUCED BY THE BFS SOFTWARE GOES INTO AN ELECTROMECHANICAL OMS ]
 ]  THRUST VECTOR CONTROL ACTUATOR INSTEAD OF A HYDRAULIC ACTUATOR.    ]
 ]  THEREFORE, RATE LIMITING OF THE OMS CMD IS NOT REQUIRED.  THE      ]
 ]  ACTUATOR MINIMUM RATE LIMIT IS 3/SEC. SINCE THE TIME DURATION IS  ]
 ]  80 MILLISECONDS, THE OMS POSITION WILL CHANGE A MAXIMUM OF 0.26    ]
 ]  DEGREES.  THE TRANSIENT IS NOT DETRIMENTAL TO THE ACTUATOR AND     ]
 ]  WILL NOT AFFECT THE PERFORMANCE OF THE SYSTEM OR VEHICLE.          ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ]  THE USER SHOULD BE AWARE THAT WHEN THE PRIMARY/SECONDARY           ]
 ]  ACTUATOR SELECTION IS PERFORMED PRIOR TO ENGAGEMENT, UPON BFS      ]
 ]  TAKEOVER IN OPS 1 AND 3, THE OMS CMD STRIP CHART DATA WILL         ]
 ]  SHOW OCCURRENCE OF ZAP CMD WHICH APPEARS AS TRANSIENTS.            ]
 ]  THESE TRANSIENTS ARE NOT VISIBLE ON THE CRT DISPLAY.               ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                   CP      ]APPROVAL:                    ]
 ]RI:<S>A. TROY             DATE 07/29/88]                             ]
 ] --------------------         ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 08/02/88]                             ]
 ] --------------------         ---------] JACK G BOYKIN      08/17/88 ]
 ]PF MGR: J VERNON          DATE 07/29/88]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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