!  File:  5253C.PROP
!  Database:  PEPDB
!  Date:  24-FEB-1994:03:10:39

coverpage:

  title_1:         INITIAL FHST/RGA SCALE-FACTOR-ALIGNMENT DETERMINATION
    proposal_for:  SME/PCS
    pi_fname:      MARTIN
    pi_lname:      GAKENHEIMER
    pi_inst:       ALLIED-SIGNAL TECHNICAL SERVICES
    pi_country:    USA
    pi_phone:      (301)286-3932
    hours_pri:     12.00
    num_pri:       6
    realtime:      Y
! end of coverpage

abstract:

    line_1:        Starting from a specific attitude, HST will
    line_2:        be commanded to perform a series of maneuvers
    line_3:        around three mutually orthogonal axes in order to
    line_4:        acquire RGA data and FHST attitudes to compute the
    line_5:        initial FHST/RGA scale-factor-alignment
    line_6:        matrices.  The results of the analysis will
    line_7:        be used to update the PDB and the flight
    line_8:        software, and are necessary for future
    line_9:        observations.

!
! end of abstract

general_form_proposers:

  lname:           BRADLEY
    fname:         ART
    inst:          ALLIED-SIGNAL AEROSPACE
    country:       USA

!

  lname:           GAKENHEIMER
    fname:         MARTIN
    inst:          ALLIED-SIGNAL TECHNICAL SERVICES
    country:       USA

!

  lname:           HALLOCK
    fname:         LOU
    inst:          GODDARD SPACE FLIGHT CENTER
    country:       USA

!

  lname:           KIMMER
    fname:         ED
    inst:          ALLIED-SIGNAL TECHNICAL SERVICES
    country:       USA

!

  lname:           WELTER
    fname:         GARY
    inst:          COMPUTER SCIENCES CORPORATION
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        2
    section:       1
    line_1:        This activity is a required step in the
    line_2:        determination of the RGA alignment and
    line_3:        calibration parameters necessary for the
    line_4:        proper processing of attitude sensor data in
    line_5:        the onboard Pointing Control System and in
    line_6:        the ground PASS software.

!

  question:        3
    section:       1
    line_1:        Two sets of slews, separated by 24 hours for
    line_2:        PASSOPS processing, are required.  The first
    line_3:        set will provide data to perform the
    line_4:        calibration and the second set is intended to
    line_5:        validate the initial set of results.  For
    line_6:        each slew in both sets, contiguous RGA data
    line_7:        is required encompassing an initial FHST map
    line_8:        scheduled as close to the slew as possible,
    line_9:        the slew, and a final FHST map generated
    line_10:       as close to the slew as possible.  No FHST
    line_11:       updates or other intervening activities
    line_12:       should be scheduled.  Minimally all FHST
    line_13:       maps require 2 FHSTs concurrently mapping for
    line_14:       at least 5 minutes.  Continuous ETR coverage
    line_15:       is required for each slew encompassing both
    line_16:       the FHST maps and the slew.  Realtime data
    line_17:       is used as a backup to the ETR data.

!

  question:        3
    section:       2
    line_1:        Each slew starts from the end of the previous
    line_2:        slew and is specified by its destination in
    line_3:        ecliptic coordinates.  The current targets
    line_4:        are specified relative to the sun's position
    line_5:        with azimuth angles defined in a counter-
    line_6:        clockwise ascending order as viewed from the
    line_7:        north ecliptic pole and with positive
    line_8:        elevations in the hemisphere north of the
    line_9:        ecliptic plane.  The targets have been
    line_10:       selected with a 5 degree pad to avoid
    line_11:       the solar and anti-sun constraints that
    line_12:       reflect magnetometer and SADE constraints.
    line_13:       Each slew target should be implemented to
    line_14:       within 1 degree of the coordinates specified
    line_15:       with HST in an optimal roll orientation.
    line_16:       The padded constraint cones are 62 degrees
    line_17:       and 40 degrees from the solar and anti-sun
    line_18:       regions, respectively.  The slew sequence
    line_19:       follows.

!

  question:        3
    section:       3
    line_1:        Calibration sequence:
    line_3:        Proposal-preparation slew to an azimuth of
    line_4:        180 degrees and an elevation of 40 degrees.
    line_6:        Slew to azimuth of 140 degrees and an
    line_7:        elevation of 0 degrees.
    line_9:        Slew to an azimuth of 62 degrees and an
    line_10:       elevation of 0 degrees.
    line_12:       Slew to an azimuth of 0 degrees and an
    line_13:       elevation of 62 degrees.
    line_15:       In three steps slew back to the starting
    line_16:       points of the fourth slew, then the third
    line_17:       slew and then the second slew.  (HST should
    line_18:       now be pointing to an azimuth of 180 degrees
    line_19:       and an elevation of 40 degrees.)

!

  question:        3
    section:       4
    line_1:        Verification slews:
    line_3:        Repeat the proposal-preparation slew assuming
    line_4:        other users are slewing HST during the 24 hour
    line_5:        period between the calibration and
    line_6:        verification slews.
    line_8:        Similar to the 6 calibration slews, slew
    line_9:        to (220,0), then (298,0) and then (0,62),
    line_10:       then slew to (298,0), (220,0) and (180,40)
    line_11:       where (220,0) represents an azimuth of 220
    line_12:       degrees and an elevation of 0 degrees.

!

  question:        3
    section:       5
    line_1:        In lieu of points with positive elevations
    line_2:        referenced to the ecliptic plane, positive
    line_3:        declinations in celestial coordinates
    line_4:        will suffice.  (As a rsult the roll-yaw
    line_5:        maneuvers around the constraint regions will
    line_6:        typically not be 90 degrees.)  If a starting
    line_7:        point off the ecliptic plane is difficult,
    line_8:        specific slew ordering is not important.

!

  question:        3
    section:       6
    line_1:        At least four of the calibration slews, including
    line_2:        a rotation in the ecliptic plane, a rotation
    line_3:        about the anti-sun constraint region and a
    line_4:        rotation about the sun constraint region are
    line_5:        required for processing.  PASSOPS requires
    line_6:        24 hours to compute the RGA alignments and
    line_7:        scale factors for the operational gyros and
    line_8:        to uplink tables to the DF224.  The
    line_9:        verification slews will be used to confirm
    line_10:       these results and to provide additional data
    line_11:       to refine these results.

!

  question:        5
    section:       1
    line_1:        ETR data is required continously for each
    line_2:        data interval of a pair of FHST maps and slew
    line_3:        in between.  ETR dumps need to be scheduled
    line_4:        with MOC personnel to avoid track changes
    line_5:        because they cause gaps in the data intervals.
    line_6:        An ETR dump needs to be scheduled soon after
    line_7:        the 6 calibration slews and soon after the
    line_8:        6 verifications slews to expedite the ground
    line_9:        processing.  The real-time data, scheduled to
    line_10:       the maximum possible extent, will be used to
    line_11:       fill in any unexpected gaps in the ETR data.
    line_12:       Telemetry format of PN is required during the
    line_13:       data intervals.  At other times AN format is
    line_14:       acceptable.  For the attitude computation, it
    line_15:       is important that at least 2 FHST's be
    line_16:       simultaneously unocculted both before and after
    line_17:       the slew with telemetry in PN format being
    line_18:       recorded on the ETR for the entire intervals
    line_19:       of simultaneous FHST maps.

!

  question:        5
    section:       2
    line_1:        Targets are specified as offsets in celestial
    line_2:        coordinates from the sun, however, ecliptic
    line_3:        offsets are desired.

!

  question:        7
    section:       1
    line_1:        Data reductionwill be performed in the PASS
    line_2:        system.  The initial FHST/RGA scale-factor-
    line_3:        alignment tables for use on HST are expected
    line_4:        to be available within 24 hours after the
    line_5:        completion of the calibration slews.  Within
    line_6:        12 hours after the verification slews, the
    line_7:        implementation of the intial tables will be
    line_8:        confirmed and possibly a refined result will
    line_9:        be available.

!

  question:        8
    section:       1
    line_1:        This proposal requires a reasonable estimate
    line_2:        of the FHST/FHST alignments for the attitude
    line_3:        determination.  For the servicing mission,
    line_4:        map data from this proposal can be combined
    line_5:        with map data from the FHST/FHST alignment
    line_6:        activity (G034) to refine FHST/FHST alignment
    line_7:        estimate prior to computing the FHST/RGA
    line_8:        alignment.  The results of this proposal are
    line_9:        required before HST can be accurately slewed.

!
!end of general form text

general_form_address:

  lname:           Bradley
    fname:         Art
    inst:          Allied-Signal Aerospace
    addr_1:        mail code 440.8; Bldg 3
    addr_2:        Goddard Space Flight Center
    city:          Greenbelt
    state:         MD
    zip:           20771
    country:       USA
    phone:         (301)286-2874

!

  lname:           Gakenheimer
    fname:         Martin
    category:      PI
    inst:          Allied-Signal Technical Services
    addr_1:        mail code 519.1; Bldg 3
    addr_2:        Goddard Space Flight Center
    city:          Greenbelt
    state:         MD
    zip:           20771
    country:       USA
    phone:         (301)286-3932

!

  lname:           Hallock
    fname:         Lou
    inst:          Goddard Space Flight Center
    addr_1:        mail code 510.1; Bldg 3
    addr_2:        Goddard Space Flight Center
    city:          Greenbelt
    state:         MD
    zip:           20771
    country:       USA
    phone:         (301)286-4863

!

  lname:           Kimmer
    fname:         Ed
    inst:          Allied-Signal Technical Services
    addr_1:        mail code 519.1; Bldg 3
    addr_2:        Goddard Space Flight Center
    city:          Greenbelt
    state:         MD
    zip:           20771
    country:       USA
    phone:         (301)286-3932

!
! end of general_form_address records

! No fixed target records found

solar_system_targets:

  targnum:         1
    name_1:        FHST1
    descr_1:       OTHER
    lev1_1:        STD = SUN
    lev2_1:        TYPE = POS_ANGLE,
    lev2_2:        RAD  = 223200,
    lev2_3:        ANG  = 0,
    lev2_4:        REF = NORTH
    comment_1:     AT ECLIPTIC LONGITUDE OF SUN
    comment_2:     62 DEGREES NORTH OF THE ECLIPTIC
    comment_3:     IN ECLIPTIC LATITUDE

!

  targnum:         2
    name_1:        FHST2
    descr_1:       OTHER
    lev1_1:        STD = SUN
    lev2_1:        TYPE = POS_ANGLE,
    lev2_2:        RAD  = 223200,
    lev2_3:        ANG  = 90,
    lev2_4:        REF = NORTH
    comment_1:     LEAD SUN BY 62 DEGREES
    comment_2:     IN THE ECLIPTIC

!

  targnum:         3
    name_1:        FHST3
    descr_1:       OTHER
    lev1_1:        STD = SUN
    lev2_1:        TYPE = POS_ANGLE,
    lev2_2:        RAD  = 504000,
    lev2_3:        ANG  = 90,
    lev2_4:        REF = NORTH
    comment_1:     LEAD SUN BY 140 DEGREES
    comment_2:     IN THE ECLIPTIC

!

  targnum:         4
    name_1:        FHST4
    descr_1:       OTHER
    lev1_1:        STD = SUN
    lev2_1:        TYPE = POS_ANGLE,
    lev2_2:        RAD  = 504000,
    lev2_3:        ANG  = 0,
    lev2_4:        REF = NORTH
    comment_1:     180 DEGREES FROM SUN
    comment_2:     IN ECLIPTIC LONGITUDE
    comment_3:     40 DEGREES NORTH
    comment_4:     IN ECLIPTIC LATITUDE

!

  targnum:         5
    name_1:        FHST5
    descr_1:       OTHER
    lev1_1:        STD = SUN
    lev2_1:        TYPE = POS_ANGLE,
    lev2_2:        RAD  = 223200,
    lev2_3:        ANG  = 270,
    lev2_4:        REF = NORTH
    comment_1:     LAG SUN BY 62 DEGREES
    comment_2:     IN THE ECLIPTIC

!

  targnum:         6
    name_1:        FHST6
    descr_1:       OTHER
    lev1_1:        STD = SUN
    lev2_1:        TYPE = POS_ANGLE,
    lev2_2:        RAD  = 504000,
    lev2_3:        ANG  = 270,
    lev2_4:        REF = NORTH
    comment_1:     LAG SUN BY 140 DEGREES
    comment_2:     IN THE ECLIPTIC

!
! end of solar system targets

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    targname:      FHST4
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CYCLE 3 / 1-12;
    req_2:         SEQUENCE 1-12 NO GAP;
    req_3:         CRITICAL OBS / 1-2;
    req_4:         PCS MODE G / 1-12;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       2.000
    targname:      FHST3
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       3.000
    targname:      FHST3
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 3-4;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       4.000
    targname:      FHST2
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       5.000
    targname:      FHST2
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 5-6;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       6.000
    targname:      FHST1
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       7.000
    targname:      FHST1
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 7-8;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       8.000
    targname:      FHST2
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       9.000
    targname:      FHST2
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 9-10;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       10.000
    targname:      FHST3
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       11.000
    targname:      FHST3
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 11-12;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       12.000
    targname:      FHST4
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       21.000
    targname:      FHST4
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CYCLE 3 / 21-32;
    req_2:         SEQUENCE 21-32 NO GAP;
    req_3:         CRITICAL OBS / 21-22;
    req_4:         PCS MODE G / 21-32;
    req_5:         AFTER 12 BY 26H +/- 2H;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       22.000
    targname:      FHST6
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       23.000
    targname:      FHST6
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 23-24;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       24.000
    targname:      FHST5
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       25.000
    targname:      FHST5
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 25-26;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       26.000
    targname:      FHST1
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       27.000
    targname:      FHST1
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 27-28;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       28.000
    targname:      FHST5
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       29.000
    targname:      FHST5
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 29-30;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       30.000
    targname:      FHST6
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!

    linenum:       31.000
    targname:      FHST6
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    req_1:         CRITICAL OBS / 31-32;
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.
    comment_3:     CONTINUOUS PN FORMAT DATA FROM
    comment_4:     FROM BEGINNING OF THIS LINE
    comment_5:     THROUGH END OF NEXT LINE.

!

    linenum:       32.000
    targname:      FHST4
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  30M
    priority:      1
    param_1:       FORMAT=PN,
    comment_1:     FHST MAPPING IN 2 OR MORE
    comment_2:     FHSTS SIMULTANEOUSLY.

!
! end of exposure logsheet

! No scan data records found