 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] R. MCALLISTER      ]    PASS PROGRAM NOTE        ]       48995      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: SEPT. 1987 ]
 ] LSIS/282-7299      ]      RELEASE NOTE( )        ] REV A: 07/11/95  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 19 AND SUBS               ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G9                              ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  IMU                                             ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: V5.1.8, V4.9A                                  ]
 ]_____________________________________________________________________]
 ] TITLE:  PROCEDURES TO INCREASE IMU READ RATE DURING IMU MODING      ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:  THE TERM/IDLE PROCESSING OF THE IMU SOP WILL ATTEMPT  ]
 ] TO READ THE IMU'S AT A 0.52 HZ RATE WHILE SPEC 104 IS ACTIVE. BELOW ]
 ] ARE TWO PROCEDURES WHICH MAY BE USED TO OBTAIN IMU DATA AT A HIGHER ]
 ] RATE WHEN IMU'S ARE BEING MODED FROM STANDBY TO OPERATE.            ]
 ]     PROCEDURE 2 (USING TCS) IS THE RECOMMENDED METHOD OF OBTAINING  ]
 ] HIGHER RATE DATA DURING IMU RUN-UP SEQUENCE.                        ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:  PROCEDURE 1:                                         ]
 ] A. COMMAND ONE IMU FROM STANDBY TO OPERATE MODE (ITEM 13, 14, OR 15 ]
 ]    ON SPEC 104 DEPENDING ON THE IMU TO BE COMMANDED TO OPERATE).    ]
 ]    NOTE THAT AN I/O RESET IS REQUIRED ONCE THE IMU HAS REACHED      ]
 ]    OPERATE TO REMOVE BCE BYPASS AND RESTART THE IMU SERIAL DIGITAL  ]
 ]    DATA READ.                                                       ]
 ] B. ONCE THE IMU HAS REACHED OPERATE, SELECT THAT IMU (ITEM 16, 17   ]
 ]    OR 18 DEPENDING ON WHICH IMU IS IN OPERATE) AND INITIATE PLATFORM]
 ]    POSITIONING SUBMODE (ITEM 26) FOR THAT IMU. THIS WILL INITIATE   ]
 ]    A 25 HZ READ OF ALL IMU'S, EVEN THOUGH THE READ OF IMU SERIAL    ]
 ]    DIGITAL DATA FOR THE IMU'S IN STANDBY IS BYPASSED BY THE         ]
 ]    OPERATING SYSTEM (FCOS).                                         ]
 ] C. COMMAND THE SECOND IMU FROM STANDBY TO OPERATE MODE. DISCRETE    ]
 ]    DATA FOR THE SECOND IMU IS AVAILABLE AT 25 HZ.                   ]
 ] D. ONCE THE SERIAL DIGITAL INTERFACE IN THE IMU IS ACTIVATED DURING ]
 ]    THE RUN-UP SEQUENCE, ISSUE AN I/O RESET TO FCOS.                 ]
 ] E. DESIRED DATA IS NOW BEING READ AT 25 HZ FOR THE IMU BEING MODED  ]
 ]    FROM STANDBY TO OPERATE.                                         ]
 ] PROCEDURE 2:                                                        ]
 ] DEVELOP A TCS SEQUENCE THAT USES THE TCS READ OPERATOR AND TCS      ]
 ] DELAY OPERATOR IN A LOOP TO READ THE IMU SERIAL DIGITAL DATA AND    ]
 ] DISCRETE DATA.                                                      ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]LSIS:   JEAN L. ZOPHY     DATE 08/15/95]                             ]
 ]     -------------------      ---------]                             ]
 ]ASD:   ERIC C. BINGHAM    DATE 08/15/95]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 08/24/95 ]
 ]PF MGR:  OANH N. PHAM     DATE 08/21/95]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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