!   $Id: 4435,v 4.1 1994/07/27 14:27:15 pepsa Exp $

coverpage:

  title_1:         SPACECRAFT DISTURBANCE TEST
    proposal_for:  SME/PCS
    pi_fname:      MIKE
    pi_lname:      URBAN
    pi_inst:       GSFC
    pi_country:    USA
    pi_phone:      301-286-1335
! end of coverpage

abstract:

    line_1:        This test will verify the absence or presence of thermally induced spacecraft
    line_2:        disturbances with the Solar Array 2 wings installed.  It will provide
    line_3:        information on the locations and nature of the disturbance.  The test requires
    line_4:        that data be taken with the spacecraft in two attitudes:
    line_5:        1)  +V3 to the Sun
    line_6:        2)  -V1 to the Sun (as close as possible given operating constraints)
    line_7:        In both cases, the solar array panels shall be normal to the Sun.

!
! end of abstract

general_form_proposers:

  lname:           URBAN
    fname:         MIKE
    inst:          GSFC
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        2
    section:       1
    line_1:        This test will provide data to concerning the behavior of the vehicle during
    line_2:        critical times of the orbit with the arrays in normal configuration.

!

  question:        3
    section:       1
    line_1:        This test will be conducted with gyros in Low Rate Mode
    line_2:        for attitude reference.
    line_4:        All critical data e.g format PN data, will be downlinked in
    line_5:        realtime when possible, and recorded on the ETR as a backup,
    line_6:        and will be dumped to the STOCC to ensure that all critical
    line_7:        data are available for either real time or near-real time
    line_8:        analysis.
    line_10:       SAGA must be disabled prior to running this test. Periods of GHRS carrousel
    line_11:       motion will be identified and taken into account during the data analysis.

!

  question:        3
    section:       2
    line_1:        This test is defined in the following sequences:
    line_2:        Sequence 1:  SET-UP
    line_3:        - Maneuver HST to +V3 to the Sun (South Ecliptic Pole selected).
    line_4:        - Gryo tracking and vehicle in low rate mode.  SAGA disabled.
    line_6:        Sequence 2:  +V3 to Sun
    line_7:        - HST remains pointed with +V3 to the sun.
    line_8:        - Solar Arrays positioned to normal (+90degrees) orientation.
    line_9:        - Set Acquisition Gains and obtain 3 orbits of format PN eng data.
    line_10:       - Set Maneuver Gains and obtain 3 more orbits of format PN eng data.
    line_11:       Sequence 3:  -V1 to Sun (as close as possible given operational constraints)
    line_12:       - HST will be pointed with -V1 to the sun.
    line_13:       - Solar Arrays positioned to normal (0degrees) orientation.
    line_14:       - Set Acquisition Gains and obtain 3 orbits of format PN eng data.
    line_15:       - Set Maneuver Gains and obtain 3 more orbits of format PN eng data.
    line_16:       Sequence 4:  RECOVER NORMAL CONFIGURATION
    line_17:       - HST can remain pointed with -V1 to the sun.
    line_18:       - Vehicle to normal mode.
    line_19:       - Re-enable SAGA, if required.

!

  question:        3
    section:       3
    line_1:        During the test sequences, the PCS data contained in
    line_2:        telemetry format PN will be used to characterize the
    line_3:        SA-induced attitude disturbance problem.  All the data
    line_4:        collected are to be recorded at all times.

!

  question:        4
    section:       1
    line_1:        HST gryo assembly data will be analyzed in time and
    line_2:        freq. domains using PSD's. These results will be
    line_3:        correlated to the SA config's wrt the vehicle,and
    line_4:        and to the vehicle config. wrt to the sun. The data
    line_5:        will be compared to the predicted behavior of each
    line_6:        array individually, and both together. ESA, GFSC and
    line_7:        LMSC-W will participate in the analysis of the results.

!

  question:        5
    section:       1
    line_1:        Prerequisites:
    line_2:        Gryo tracking capabilities enabled via FHST/RGA Alignment (G035).
    line_3:        (Via proposal 5253.)
    line_4:        All spacecraft subsystems ready to obtain the required data.
    line_5:        All appendages deployed.
    line_6:        Aperture door open.
    line_10:       Special Scheduling Requirements:  Realtime uplinks are required where
    line_11:       requested via REQ UPLINK in the special_requirements to set the PCS
    line_12:       gain values.
    line_13:       Data have been requested in realtime
    line_14:       as much as possible with critical data sets backed up to ETR
    line_15:       as requested via the CRIT OBS special requirement.

!
!end of general form text

general_form_address:

  lname:           URBAN
    fname:         MIKE
    category:      PI
    inst:          GSFC
    phone:         301-286-1335

!
! end of general_form_address records

fixed_targets:

    targnum:       1
    name_1:        SEP
    pos_1:         RA = 89.4642D +/- .01",
    pos_2:         DEC = -64.48596D +/- .01"
    equinox:       1990
    comment_1:     SOUTH ECLIPTIC POLE FOR +V3
    comment_2:     TO THE SUN POINTING

!
! end of fixed targets

! No solar system records found

generic_targets:

  targnum_1:       2
    name_1:        MSS-LAG-GEN
    criteria_1:    CLOSE TO ANTI-SUN PTG;
    criteria_2:    SPSS WILL FIGURE OUT;

!
! end of generic targets

exposure_logsheet:

    linenum:       1.000
    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
    req_1:         SEQ 1-2 NO GAP;
    req_2:         CYCLE 4/ 1-201;
    comment_1:     +V3 TO THE SUN, GRYO TRACK,
    comment_2:     LOW RATE MODE.

!

    linenum:       2.000
    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_2:         RT ANALYSIS;
    req_3:         REQ UPLINK;
    comment_1:     UPLINK VALUES OF PCS
    comment_2:     ACQ. GAINS. DISABLE SAGA.

!

    linenum:       3.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  15M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 2 BY 65M +/- 30M;
    req_4:         SEQ 3-11 NO GAP;
    comment_1:     BACKUP COMMAND RQST

!

    linenum:       5.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  288M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    param_2:       FORMAT=PN,
    req_1:         CRIT OBS;
    comment_1:     COLLECT/REC 3 ORBITS OF
    comment_2:     FORMAT 'PN' DATA.

!

    linenum:       11.000
    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:     UPLINK VALUES OF PCS
    comment_2:     MANEUVER GAINS.

!

    linenum:       12.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  15M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 11 BY 65M +/- 30M;
    req_4:         SEQ 12-14 NO GAP;
    comment_1:     BACKUP COMCON TO
    comment_2:     UPLINK VALUES OF PCS
    comment_3:     MANEUVER GAINS.

!

    linenum:       13.000
    targname:      SEP
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  288M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    param_2:       FORMAT=PN,
    req_1:         CRIT OBS;
    comment_1:     COLLECT/REC 3 ORBITS OF
    comment_2:     FORMAT 'PN' DATA.

!

    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=GYRO
    req_2:         RT ANALYSIS;
    comment_1:     COMMAND TO DUMP THE ETR.

!

    linenum:       101.000
    targname:      MSS-LAG-GEN
    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:         SEQ 101-102 NO GAP;
    comment_1:     -V1 TO THE SUN

!

    linenum:       102.000
    targname:      MSS-LAG-GEN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_2:         RT ANALYSIS;
    req_3:         REQ UPLINK;
    comment_1:     UPLINK VALUES OF PCS
    comment_2:     ACQ. GAINS.

!

    linenum:       103.000
    targname:      MSS-LAG-GEN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  15M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 102 BY 65M +/- 30M;
    req_4:         SEQ 103-111 NO GAP;
    comment_1:     BACKUP COMMAND RQST

!

    linenum:       105.000
    targname:      MSS-LAG-GEN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  288M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    param_2:       FORMAT=PN,
    req_1:         CRIT OBS;
    comment_1:     COLLECT/REC 3 ORBITS OF
    comment_2:     FORMAT 'PN' DATA.

!

    linenum:       111.000
    targname:      MSS-LAG-GEN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_2:         RT ANALYSIS;
    req_3:         REQ UPLINK;
    comment_1:     UPLINK VALUES OF PCS
    comment_2:     MANEUVER GAINS.

!

    linenum:       112.000
    targname:      MSS-LAG-GEN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  15M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_1:         RT ANALYSIS;
    req_2:         REQ UPLINK;
    req_3:         AFTER 111 BY 65M +/- 30M;
    req_4:         SEQ 112-114 NO GAP;
    comment_1:     BACKUP COMCON TO
    comment_2:     UPLINK VALUES OF PCS
    comment_3:     MANEUVER GAINS.

!

    linenum:       113.000
    targname:      MSS-LAG-GEN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  288M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO,
    param_2:       FORMAT=PN,
    req_1:         CRIT OBS;
    comment_1:     COLLECT/REC 3 ORBITS OF
    comment_2:     FORMAT 'PN' DATA.

!

    linenum:       114.000
    targname:      MSS-LAG-GEN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_2:         RT ANALYSIS;
    comment_1:     COMMAND TO DUMP THE ETR.

!

    linenum:       201.000
    targname:      MSS-LAG-GEN
    config:        S/C
    opmode:        DATA
    aperture:      V1
    num_exp:       1
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       CONTROL=GYRO
    req_2:         RT ANALYSIS;
    req_3:         REQ UPLINK;
    req_4:         AFTER 14; AFTER 114;
    comment_1:     RECOVERY COMCON  -
    comment_2:     IF NEEDED.

!
! end of exposure logsheet

! No scan data records found