!  File:  4020C.PROP
!  Database:  PEPDB
!  Date:  20-FEB-1994:04:04:25

coverpage:

  title_1:         DF-224 VERSION 7.3 FS INSTALLATION
    proposal_for:  ENG/SC
    pi_fname:      LESLYE
    pi_lname:      BOYCE
    pi_inst:       CODE 441
    pi_country:    USA
    num_pri:       1
! end of coverpage

abstract:

    line_1:        Version 7.3 will implement a three logical memory unit
    line_2:        contingency plan.  It removes under utilized DF-224 code
    line_3:        to recover memory margins and restructures code.  The
    line_4:        installation of DF-224, version 7.3 will be broken into a
    line_5:        Installation, Regression test, and Contingency Back-out
    line_6:        time.  In addition, it eliminates the 10 and 300 second
    line_7:        processing rate.  It is highly desirable to implement
    line_8:        the version of the flight software ASAP.
    line_9:        Due to the complexity of the installation, dedicated
    line_10:       spacecraft time is required to minimize spacecraft risk
    line_11:       In summary, this proposal requests 14 orbits of dedicated
    line_12:       spacecraft time for installation, regression test, and
    line_13:       contingency back_out time for DF-224 FS V7.3 to be
    line_14:       scheduled in the first few days of SMS 054.

!
! end of abstract

general_form_proposers:

  lname:           BOYCE
    fname:         LESLYE
    inst:          GFSC/CODE 441
    country:       USA
    esa:           X

!

  lname:           LEIBOWITZ
    fname:         ARIEL
    inst:          GFSC/CODE 512
    country:       USA
    esa:           X

!

  lname:           ROY
    fname:         NORM
    inst:          LMSC/CODE 440.8
    country:       USA
    esa:           X

!

  lname:           MESNARD
    fname:         GEOF
    inst:          LMSC/CODE 440.8
    esa:           X

!
! end of general_form_proposers block

general_form_text:

  question:        2
    section:       1
    line_1:        The time allocated will provide the specific vehicle
    line_2:        configuration and dedicated spacecraft time for in-
    line_3:        stallation and regressin testing of ver. 7.3 FS mod.
    line_4:        The new flight code once installed and validated via
    line_5:        on-orbit regression test, will provide the capability
    line_6:        to operate the FS code within 3 Logical Memory Units
    line_7:        (LMU). The specific HST configuration for installation
    line_8:        of this flight code is needed to configure the vehicle
    line_9:        reduce the CPU processing during installation, perform
    line_10:       regression test and provide contingency time removal
    line_11:       of the code in the event anomalies are detected.

!

  question:        3
    section:       1
    line_1:        The described sequence of events should occur in the first
    line_2:        few days of the SMS prior to Wednesday of the SMS period and
    line_3:        must occur in the specified order.
    line_4:        1. Installation
    line_5:        Install flight code changes and reallocate memory, install
    line_6:        new A&P telemetry formats; trans ground elements to Project
    line_7:        Database Ver. 28.A; perform a memory dump; load Acq. logic
    line_8:        (realloction of Sequence Pointer).
    line_9:        VEHICLE CONFIGURATION:  The HST innormal mode using the gyros
    line_11:       for attitude reference. The vehicle attitude is to be V1:RA=
    line_12:       157.0, DEC=10.0, ROLL= -172.91 (-V1 sunpoint, 180 deg roll).
    line_13:       4 Kbps programmable "AN" format should be active with the
    line_14:       engineering recorder activities performed by generic sched-
    line_15:       uling by PASS. During this period Operations will be
    line_16:       switching from 4 Kbps "AN" format to "FN" format while the
    line_17:       telemetry mux tables are loaded. The following FSW processing
    line_18:       MUST be disabled or inactive prior to installation
    line_19:       1.) FGS acq. ATTITUDE update, Command packets #33-47 DISABLED
    line_20:       2.) Conditional Processor DISABLED
    line_21:       3.) FHST processing be INACTIVE, Command packets #31,32
    line_22:       Additinal SSAF COMCON request should be included in  the SMS
    line_23:       of 15-20 minutes duration each for a total of 2 per orbit.

!

  question:        3
    section:       2
    line_1:        A full DF-224 memory dump will follow installation.  All
    line_2:        engineering data will be recovered either in RT or via
    line_3:        the Engineering Tape Recorder (ETR).
    line_4:        TIME REQUIREMENT: 6 orbits dedicated.
    line_5:        REGRESSION TEST: The regression test activities are defined
    line_6:        to be the minimum activities which are pertinent to vehicle
    line_7:        health and safety or continued normal vehicle opertions. The
    line_8:        majority of the regression test items are autonomously
    line_9:        performed by the DF-224 FS as a result of vehicle config-
    line_10:       uration. The activites have been defined and success/fail
    line_11:       criteria established. Specific activities that are to be
    line_12:       scheduled by the StSCI SMS are a large vehicle slew to the
    line_13:       specified attitude with attendent Solar Array slew. Following
    line_14:       this slew is a unspecified Course Track Acq. (A format), Re-
    line_15:       acq. (A format), and a Fine Lock Acq. (P format). Verifica-
    line_16:       tion has been perormed and available Guide Stars for the acq.
    line_17:       are available. (See attachment B).
    line_18:       VEHICLE CONFIG: V1:RA=90.0, DEC=-67.0, ROLL=0.00 (SEP,+V3
    line_19:       sunpoint). 4Kbps programmable "AN" format should be active
    line_20:       w/ ETR activities performed by generic scheduling by PASS.
    line_21:       During this period Operations will be switching to 4Kbps
    line_22:       "AN" format and "PN" format to verify the telemetry mux
    line_23:       tables are valid. The FSW processing previosly disabled will

!

  question:        3
    section:       3
    line_1:        be enabled via real-time activation of the SSPC as part of
    line_2:        the installation procedure.
    line_3:        TIME REQUIRED:  3 orbits dedicated
    line_4:        CONTINGENCY REMOVAL: The contingency removal time is the time
    line_5:        required to remove the DF-224 code modifications, telemetry
    line_6:        formats and fall back to the version 27.B of the Project
    line_7:        Database and associated ground elements.  The vehicle
    line_8:        configuration will be managed by Operations in the event
    line_9:        removal of the code is necessary.
    line_10:       Additinal SSAF COMCON request should be included in  the SMS
    line_11:       of 15-20 minutes duration each for a total of 2 per orbit.
    line_12:       A full DF-224 memory dump will follow installation.  All
    line_13:       engineering data will be recovered either in RT or via
    line_14:       the Engineering Tape Recorder (ETR).
    line_15:       TIME REQUIREMNET:  4 orbits dedicated.

!

  question:        4
    section:       1
    line_1:        Due to the complexity of this DF-224 installation, dedicated
    line_2:        spacecraft time is needed to reduce the CPU processing and
    line_3:        prevent unknown anomalous FSW operation, possibly causing
    line_4:        entry into safemode. Previously, serendipitous installations
    line_5:        of FSW codehave proved to be difficult when specific vehicle
    line_6:        configurations are desired.  Project Office, code 440 has
    line_7:        therefore directed that all future FSW installations
    line_8:        requiring specific vehicle configurations be submitted
    line_9:        through the proposal system.

!

  question:        5
    section:       1
    line_1:        13 orbits
    line_2:        sms day orbit activity
    line_3:        055/1200 ATTITUDE V1:RA 157.0 d, DEC 10.0 d, ROLL -179.0
    line_4:        1 install flight code changes, reallocate
    line_5:        memory (phase I&II excluding Acq change)
    line_6:        2 install telemetry formats A&P (PhaseIII)
    line_7:        3 contingency time
    line_8:        4,5 trans ground elements to PBD 28.A
    line_9:        6 load Acq logic
    line_11:       055/1200 ATTITUDE V1:RA 90.0, DEC -67.0, ROLL 0.00
    line_12:       7 slew, fine lock acq., (P format via
    line_13:       merge SMS) RT analysis
    line_14:       8 Course Track (CT) acq. (A format via
    line_15:       merge SMS) RT analysis
    line_16:       9 CT re-acq. (F format), RT analysis
    line_17:       056/0130  back-out contingency time begins
    line_18:       10 remove FS code
    line_19:       11 reinstall telemetry formats A&P
    line_20:       12 trans ground elements back to PBD27.B
    line_21:       13 reload old acq. logic
    line_22:       056/0730  Version 7.3 complete, normal science

!
!end of general form text

general_form_address:

  lname:           BOYCE
    fname:         LESLYE
    category:      PI
    inst:          CODE 441
    phone:         301 286-8219

!
! end of general_form_address records

fixed_targets:

    targnum:       1
    name_1:        SEP
    descr_1:       S.ECLIPTIC POLE (NOMINAL) WITH +V3 TO SUN
    pos_1:         RA = 270.0D  +/- .1",
    pos_2:         DEC = -66.500D +/- .01"
    equinox:       1991

!
! end of fixed targets

! No solar system records found

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        POINTING
    aperture:      V1
    num_exp:       1
    time_per_exp:  1S
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_1:         CYCLE 1 / 1-26;
    req_2:         SEQ 1-26 NO GAP;
    comment_1:     RA=157.00 DEG, DEC=10.00
    comment_2:     DEG, ROLL=172.91 DEG
    comment_3:     -V1 SUNPOINT "AN" FORMAT

!

    linenum:       2.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     FGS ACQ, FHST PROCESSING, ATTITUDE
    comment_2:     UPDATE, CONDITIONAL PROCESSOR
    comment_3:     AND COMMAND PACKETS 31,32,33-47 MUST
    comment_4:     BE INACTIVE VIA SPC.  BEGIN INSTALLA-
    comment_5:     TION OF FLIGHT CODE REALOCATE MEMORY
    comment_6:     VIA RTC (ORBIT 1)

!

    linenum:       3.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 2 BY 20M+/-10M;
    comment_1:     SAME COMMENT AS LINE 2

!

    linenum:       4.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     INSTALL TELEMETRY FORMATS A & P
    comment_2:     VIA RTC (ORBIT 2)

!

    linenum:       5.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 4 BY 20M+/-10M;
    comment_1:     SAME COMMENT AS LINE 4

!

    linenum:       6.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     CONTINGENCY TIME (ORBIT 3)

!

    linenum:       7.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 6 BY 20M+/-10M;
    comment_1:     SAME COMMENT AS LINE 6

!

    linenum:       8.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     TRANSITION GROUND ELEMENTS TO
    comment_2:     PDB 28.A (ORBIT 4)

!

    linenum:       9.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 8 BY 20M+/-10M;
    comment_1:     SAME COMMENT AS LINE 8

!

    linenum:       10.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     REPEAT OF 8
    comment_2:     (ORBIT 5)

!

    linenum:       10.500
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 10 BY 20M+/-10M;
    comment_1:     SAME COMMENT AS LINE 10

!

    linenum:       11.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     LOAD ACQ LOGIC
    comment_2:     VIA RTC (ORBIT 6)

!

    linenum:       12.000
    targname:      ANTI-SUN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 11 BY 20M+/-10M;
    comment_1:     SAME COMMENT AS LINE 11
    comment_2:     REACTIVE FS PROCESSING VIA SPC

!

    linenum:       12.500
    targname:      SEP
    config:        S/C
    opmode:        POINTING
    aperture:      V1
    num_exp:       1
    time_per_exp:  1S
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    comment_1:     SLEW TO SEP ORBIT 7

!

    linenum:       13.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_3:     FINE LOCK ACQ VIA SPC
    comment_4:     LOAD P FORMAT VIA MOC MERGE

!

    linenum:       14.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=FGS,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 13 BY 20M+/-10M;
    comment_1:     TIME ALLOTED FOR REALTIME ANALYSIS
    comment_2:     OF FINE LOCK ACQ (ORBIT 7)

!

    linenum:       15.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=FGS,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     COURSE TRACK ACQUSITION
    comment_2:     VIA SPC (ORBIT 8)
    comment_3:     LOAD FORMAT A VIA MOC MERGE

!

    linenum:       16.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=FGS,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 15 BY 20M+/-10M;
    comment_1:     TIME ALLOCTED FOR REALTIME ANALYSIS
    comment_2:     OF COURSE TRACK ACQUISITION (ORBIT 8)

!

    linenum:       17.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=FGS,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     COURSE TRACK RE-ACQ REQUESTED
    comment_2:     LOAD FORMAT F VIA MOC MERGE
    comment_3:     (ORBIT 9)

!

    linenum:       18.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=FGS,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 17 BY 20M+/-10M;
    comment_1:     TIME ALLOCTED FOR REALTIME ANALYSIS
    comment_2:     OF COURSE TRACK REACQUISITION
    comment_3:     (ORBIT 9)

!

    linenum:       19.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     TIME ALLOCATED FOR CONTIGENCY
    comment_2:     1ST OPPORTUNITY FOR REMOVAL
    comment_3:     OF FS CODE (ORBIT 10)

!

    linenum:       20.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 19 BY 20M+/-10M;
    comment_1:     2ND OPPORTUNITY FOR REMOVAL
    comment_2:     OF FS CODE (ORBIT 10)

!

    linenum:       21.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     RE-INSTALL TELEMETRY FORMATS A & P
    comment_2:     VIA RTC (ORBIT 11)

!

    linenum:       22.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 21 BY 20M+/-10M;
    comment_1:     SAME COMMENT AS LINE 21

!

    linenum:       23.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     TRANSITION GROUND ELEMENT BACK
    comment_2:     TO PDB 27.B (ORBIT 12)

!

    linenum:       24.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 23 BY 20M+/-10M;
    comment_1:     SAME COMMENT AS LINE 23

!

    linenum:       25.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    comment_1:     RELOAD OLD ACQ LOGIC
    comment_2:     VIA RTC (ORBIT 13)

!

    linenum:       26.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 25 BY 20M+/-10M;
    comment_1:     SAME COMMENT AS LINE 25

!
! end of exposure logsheet

! No scan data records found