 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS:  B00961A    ]
 ] C.H. PURTELL       ]    BFS PROGRAM NOTE         ]                  ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] RI/FB37/2183       ]      RELEASE NOTE ( )       ]  07/09/80        ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]    9.08 AND SUBS              ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC(X) SEQ( ) SM/SP( ) IPL( )] 1                       ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  UI, DAP, ASCENT                                 ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038105/3.2.4.3                               ]
 ]_____________________________________________________________________]
 ] TITLE:  DOWNLISTED SRB ROCK AND TILT ACTUATOR COMMANDS              ]
 ]        FOR BFS                                                      ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]  IN THE BFS ASCENT DIGITAL AUTOPILOT (ASC_DAP) SRB                  ]
 ]  COMMAND PROCESSOR, ROLL PITCH, AND YAW ERROR SIGNALS ARE           ]
 ]  PROCESSED VIA MIXING LOGIC AS PITCH AND YAW AXIS COMMAND           ]
 ]  SIGNALS TO THE LEFT AND RIGHT SRB NOZZLE ACTUATORS.                ]
 ]  EACH SRB HAS TWO ACTUATORS (ROCK AND TILT) WHICH ARE 45            ]
 ]  DEGREES TO THE PITCH AND YAW BODY AXES, AND THE HARDWARE           ]
 ]  INTERFACE PROGRAM (HIP) MULTIPLES ASC_DAP COMMAND                  ]
 ]  SIGNALS BY THE COSINE OF 45 DEGREES TO PUT THEM INTO THE           ]
 ]  ROCK AND TILT AXES.  THE PFS ASC_DAP AND SUBSYSTEM                 ]
 ]  OPERATING PROGRAM (SOP) ARE EQUIVALENT TO THE BFS                  ]
 ]  ASC_DAP AND HIP.                                                   ]
 ]  BFS DOWNLISTED ROCK AND TILT COMMANDS ARE THE COMMANDS             ]
 ]  ISSUED BY THE SRB COMMAND PROCESSOR.  THIS IS DONE                 ]
 ]  BECAUSE THE HIP DOES NOT OPERATE WHILE BFS IS IN THE               ]
 ]  LISTEN MODE (NOT ENGAGED).  PFS ROCK AND TILT COMMANDS             ]
 ]  ARE DOWNLISTED AS THEY ARE ISSUED BY THE SOP; THEREFORE,           ]
 ]  BFS ROCK AND TILT COMMANDS CANNOT BE READILY COMPARED TO           ]
 ]  PFS.  TO FACILITATE COMPARISON, BFS ROCK AND TILT                  ]
 ]  COMMANDS AS DOWNLISTED ARE CALIBRATED BY GROUND                    ]
 ]  PROCESSING TO BE EQUIVALENT TO PFS.                                ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE: R. VAN DYK        07/09/80]APPROVAL:                    ]
 ]RI:<S> A.TROY             DATE 07/09/80]                             ]
 ] --------------------         ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 7/28/88 ]                             ]
 ] --------------------         ---------] RW MOOREHEAD        7/30/88 ]
 ]PF MGR: GENE MCSWAIN      DATE 7/29/88 ]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
 @






 +_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] SMS:  B00961A    ]
 ]  C.H. PURTELL      ]    BFS PROGRAM NOTE         ]                  ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] RI/FB37/2183       ]      RELEASE NOTE ( )       ] 07/09/80         ]
 ]____________________]_____________________________]__________________]
 ] TITLE:  DOWNLISTED SRB ROCK AND TILT ACTUATOR COMMANDS              ]
 ]        FOR BFS                                                      ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ]  THE USER SHOULD BE AWARE THAT THE BFS PARAMETERS                   ]
 ]  DOWNLISTED AS ROCK AND TILT COMMANDS ARE NOT EQUIVALENT            ]
 ]  TO PFS DOWNLISTED ROCK AND TILT COMMANDS.  THE BFS                 ]
 ]  DOWNLISTED PARAMETERS ARE CALIBRATED BY GROUND                     ]
 ]  PROCESSING TO BE EQUIVALENT TO PFS.                                ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
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 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 @
