 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] S. DEAN            ]    PASS PROGRAM NOTE        ]      38748       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: SEPT. 1987 ]
 ] DEV/282-7364       ]      RELEASE NOTE( )        ] REV A: 04/18/89  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 19 AND SUBS               ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU (X)  SM/PL ( )] G1, G9                          ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: IMU                                              ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: V4.21                                          ]
 ]_____________________________________________________________________]
 ] TITLE:  G9 ONE-SHOT TRANSFER OF DATA FROM PASS TO BFS               ]
 ]_____________________________________________________________________]
 ] (1) DESCRIPTION:                                                    ]
 ]                                                                     ]
 ] THE ONE-SHOT TRANSFER OF IMU CALIBRATION DATA FROM THE PASS TO      ]
 ] THE BFS IN OPS G9 IS NOT INTERPROCESS PROTECTED. IF THE TRANSFER    ]
 ] IS INITIATED WHILE AN IMU SOP CALIBRATION PROCEDURE OR A MM READ    ]
 ] IS IN THE PROCESS OF UPDATING THE CALIBRATION DATA, THEN A SET      ]
 ] OF NON-HOMOGENEOUS DATA COULD BE SENT TO THE BFS.                   ]
 ]                                                                     ]
 ] (2) DESCRIPTION:                                                    ]
 ]                                                                     ]
 ] ISSUING LAUNCH SEQUENCE COMMAND CODE 100100 (SRM CHAMBER PRESS CAL  ]
 ] WORD) DURING DATA TRANSFER FROM PASS TO THE BFS COULD CAUSE NON-    ]
 ] HOMOGENEOUS DATA TO BE SENT TO THE BFS.  THE ONE-SHOT TRANSFER      ]
 ] WHICH INCLUDES LH/RH SRB CHAMBER COEFFICIENT/COMPENSATION DATA IS   ]
 ] NOT INTERPROCESS PROTECTED.                                         ]
 ]_____________________________________________________________________]
 ](1) USER RESPONSE:                                                   ]
 ] PREFLIGHT CAL A (THE LAST IMU SOP PROCEDURE TO CHANGE THE CALIBRA-  ]
 ] TION DATA SENT TO THE BFS) OR A MM READ OF IMU CALIBRATION DATA     ]
 ] MUST BE COMPLETED BEFORE THE ONE-SHOT IS INITIATED.  THE CORRECT    ]
 ] PROCEDURE FOR THE DAY OF FLIGHT IS:                                 ]
 ]     A. PERFORM MM READ OF IMU CHECKPOINT DATA.                      ]
 ]     B. PERFORM ATTITUDE DETERMINATION.                              ]
 ]     C. WAIT FOR TERM/IDLE.                                          ]
 ]     D. PERFORM PREFLIGHT CAL A.                                     ]
 ]     E. WAIT FOR TERM/IDLE.                                          ]
 ]     F. PERFORM GYROCOMPASS ALIGNMENT.                               ]
 ]     G. INITIATE ONE-SHOT.                                           ]
 ]     H. WAIT FOR GYROCOMPASS CPLT TO APPEAR ON GNC IMU CNTL/MON      ]
 ]        DISPLAY (THE ASTERISK WILL STILL BE BESIDE GYROCOMP).        ]
 ]     I. PRO INTO OPS G1.                                             ]
 ] NOTE: ON THE DAY OF FLIGHT, NO INERTIAL SUBMODE REQUEST SHOULD BE   ]
 ] MADE IN OPS G9. IF SUCH A REQUEST IS MADE, UNCOMPENSATED TORQUE     ]
 ] RATES WILL CAUSE HIGH PLATFORM DRIFT RATES.  THESE HIGH RATES WILL  ]
 ]_____________________________________________________________________]
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 +_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ] S. DEAN            ]    PASS PROGRAM NOTE        ]     38748        ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: SEPT. 1987 ]
 ] DEV/282-7364       ]      RELEASE NOTE ( )       ] REV A: 04/18/89  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ]         G9 ONE-SHOT TRANSFER OF DATA FROM PASS TO BFS               ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ](1) USER RESPONSE: (CONTINUED)                                       ]
 ]                                                                     ]
 ] EXCEED PLATFORM LAUNCH ALIGNMENT TOLERANCES MUCH SOONER THAN THE    ]
 ] LOW PLATFORM DRIFT RATES THAT OCCUR WHEN A PRO INTO OPS G1 IS MADE  ]
 ] WHILE GYRO COMPASS ALIGNMENT IS STILL ACTIVE (AFTER CPLT APPEARS    ]
 ] ON THE DISPLAY).  THIS INITIATES A TUNED INERTIAL PROCESSING WHICH  ]
 ] EXTENDS THE LAUNCH WINDOW VIA THE LOWER PLATFORM DRIFT RATES.       ]
 ]                                                                     ]
 ](2) USER RESPONSE:                                                   ]
 ]                                                                     ]
 ] LAUNCH SEQUENCE COMMAND CODE 100100 SHOULD NOT BE INITIATED DURING  ]
 ] ONE-SHOT TRANSFER OF DATA TO THE BFS.                               ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: WYATT COOPER         DATE 05/10/89]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD: W.R. PRUETT          DATE 05/11/89]                             ]
 ]    --------------------      ---------]  JACK G. BOYKIN    05/22/89 ]
 ]PF MGR: J.R. THIBODEAUX   DATE 05/11/89]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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