!  File:  4257C.PROP
!  Database:  PEPDB
!  Date:  20-FEB-1994:19:17:17

coverpage:

  title_1:         DYNAMICS OF PLANETARY UPPER ATMOSPHERES - PART 2 (1083)
    sci_cat:       SOLAR SYSTEM
    proposal_for:  GTO/HSP
    cont_id:       1083
    pi_fname:      ROBERT
    pi_mi:         C.
    pi_lname:      BLESS
    pi_inst:       WISCONSIN, UNIVERSITY OF
    pi_country:    USA
    pi_phone:      608-262-1715
    keywords_1:    PLANETARY ATMOSPHERES, JOVIAN PLANETS, MARS, UPPER
    keywords_2:    OCCULTATIONS, TEMPERATURE PROFILES
    hours_pri:     7.66
    num_pri:       20
    hsp:           Y
    realtime:      Y
    time_crit:     Y
! end of coverpage

abstract:

    line_1:        Observations of planetary upper atmospheres through
    line_2:        stellar occultations are of interest because they
    line_3:        provide information about the radiative and
    line_4:        dynamical processes at work in these rarefied
    line_5:        regions (number density range: 10super13 - 10super15
    line_6:        cmsuper-3), which could be otherwise measured only
    line_7:        through direct atmospheric probe launched from a
    line_8:        spacecraft. One of the problems with interpretation
    line_9:        of the temperature profiles obtained from
    line_10:       ground-based occultation observations has been that
    line_11:       the numerical inversion of the data is highly
    line_12:       sensitive to photometric errors--especially in
    line_13:       obtaining the mean temperature of the atmosphere.
    line_14:       The much greater stability of photometry that is
    line_15:       possible with the ST will allow us to obtain more
    line_16:       accurate temperature profiles and permit a
    line_17:       comparison of the atmospheric structures of the
    line_18:       Jovian planets with much greater precision than has
    line_19:       been possible in the past. We propose a series of
    line_20:       three occultation observations for each Jovian

!
! end of abstract

general_form_proposers:

  lname:           ROBINSON
    fname:         EDWARD
    mi:            L.
    inst:          TEXAS, UNIVERSITY OF
    country:       USA

!

  lname:           BLESS
    fname:         ROBERT
    mi:            C.
    inst:          WISCONSIN, UNIVERSITY OF
    country:       USA

!

  lname:           VAN CITTERS
    fname:         G.
    mi:            W.
    inst:          NATIONAL SCIENCE FOUNDATION
    country:       USA

!

  lname:           DOLAN
    fname:         JOSEPH
    mi:            F.
    inst:          NASA, GODDARD SPACE FLIGHT CENTER
    country:       USA

!

  lname:           WHITE
    fname:         RICHARD
    mi:            L.
    inst:          SPACE TELESCOPE SCIENCE INSTITUTE
    country:       USA

!

  lname:           ELLIOT
    fname:         JAMES
    mi:            L.
    inst:          MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        We plan to identify those occultations of sufficient
    line_2:        signal-to-noise ratio to achieve the goals outlined
    line_3:        in Section 2. Each observation proceeds as follows:
    line_4:        1)  Obtain a WFPC image to determine the exact
    line_5:        occultation parameters.  2)  Acquire occultation
    line_6:        candidate using onboard acquisition mode.  3)  Scan
    line_7:        along the track that the star will follow relative
    line_8:        to the planet (along the planetary limb) in order to
    line_9:        determine the planetary contribution to the
    line_10:       background.  4)  Start a continuous series of 10ms
    line_11:       integrations enought before the predicted immersion
    line_12:       time that scattered light will not affect the
    line_13:       acquisition.  The occultation observation will
    line_14:       require simple tracking on the star before
    line_15:       atmosphere immersion, complex tracking on the
    line_16:       stellar image as it moves along the planetary limb,
    line_17:       and simple tracking after atmosphere emersion.  This
    line_18:       sequence of integrations must be continuous.  6)
    line_19:       Scan along the track that the star will follow
    line_20:       relative to the planet.  7)  Monitor dark current on

!

  question:        4
    section:       1
    line_1:        We can achieve a much better signal-to-noise ratio
    line_2:        for the temperature profiles than has been possible
    line_3:        from the ground for the following reasons: (i) the
    line_4:        greatly improved photometric stability of ST
    line_5:        photometry, which will substantially reduce the
    line_6:        errors in the numerical inversion of the data that
    line_7:        is necessary to obtain the temperature profiles;
    line_8:        (ii) our ability to reject background light from the
    line_9:        planetary limb by employing small focal plane
    line_10:       apertures; and (iii) the absence of scintillation
    line_11:       noise, which has strong components at frequencies
    line_12:       comparable to the occultation timescale.

!

  question:        5
    section:       1
    line_1:        Tracking the occulted star in some cases will require a real
    line_2:        time update, due to its complicated path caused by refraction
    line_3:        in the occulting planet's atmosphere and the uncertainties in
    line_4:        predicting the ST orbit.

!

  question:        6
    section:       1
    line_1:        A prior scan over 10 arc-seconds is needed to map
    line_2:        the scattered light field, which is needed for the
    line_3:        data reduction.

!

  question:        7
    section:       1
    line_1:        Data will be reduced and analyzed at MIT with the
    line_2:        VAX 11-750 belonging to the planetary astronomy
    line_3:        group.

!

  question:        10
    section:       1
    line_1:        Data reduction and analysis will be supported on
    line_2:        computer facilities at MIT.

!

  question:        13
    section:       1
    line_1:        Observations of the upper atmospheres of Mars and
    line_2:        the Jovian planets with HSP through stellar
    line_3:        occultations will provide infromation about the
    line_4:        radiative and dynamical processes in this region.
    line_5:        The temperature profiles obtained will allow testing
    line_6:        of the various transfer models for each planet.

!
!end of general form text

general_form_address:

  lname:           ELLIOT
    fname:         JAMES
    mi:            L.
    category:      CON
    inst:          MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    addr_1:        BLDG. 54-422
    city:          CAMBRIDGE
    state:         MA
    zip:           02139
    country:       USA
    phone:         617-253-6308
    telex:         921473 MIT CAM

!

  lname:           BLESS
    fname:         ROBERT
    mi:            C.
    category:      PI
    inst:          WISCONSIN, UNIVERSITY OF
    addr_1:        DEPARTMENT OF ASTRONOMY
    city:          MADISON
    state:         WI
    zip:           53706
    country:       USA

!
! end of general_form_address records

fixed_targets:

    targnum:       13
    name_1:        AGK+26D0765
    name_2:        GSC1904-00316
    descr_1:       STAR TO BE OCCULTED BY MARS.
    descr_2:       CLOSE APPROACH AT 14-JAN-93:01:04
    pos_1:         PLATE-ID = 0079,
    pos_2:         RA = 7H 08M 49.07S +/- 0.5",
    pos_3:         DEC = 26D 37' 46.4" +/- 0.5",
    equinox:       J2000
    acqpr_1:       BKG
    comment_1:     STAR POSITION WILL BE UPDATED
    comment_2:     BEFORE OBSERVATION IS PERFORMED.
    comment_3:     CONTACT:  AMANDA S. BOSH, MIT
    comment_4:     SOLAR ELONG 171D
    fluxnum_1:     1
    fluxval_1:     V = 8.9 +/- 0.1
    fluxnum_2:     2
    fluxval_2:     B = 9.4 +/- 0.1
    fluxnum_3:     3
    fluxval_3:     R = 8.6 +/- 0.1
    fluxnum_4:     4
    fluxval_4:     I = 8.4 +/- 0.1

!

    targnum:       14
    name_1:        AGK+26D0765-OFFSET
    name_2:        GSC1904-00069
    descr_1:       OFFSET TARGET FOR AGK+26D0765
    pos_1:         PLATE-ID = 0079,
    pos_2:         RA = 7H 08M 44.32S +/- 0.5",
    pos_3:         DEC = 26D 38' 19.2" +/- 0.5",
    equinox:       J2000
    comment_1:     STAR POSITION WILL BE UPDATED
    comment_2:     BEFORE OBSERVATION IS PERFORMED.
    comment_3:     CONTACT:  AMANDA S. BOSH, MIT
    fluxnum_1:     1
    fluxval_1:     B = 13.15 +/- 0.61

!

    targnum:       15
    name_1:        LS00305
    name_2:        GSC4953-00412
    descr_1:       STAR TO BE OCCULTED BY JUPITER.
    descr_2:       CLOSE APPROACH AT 25-FEB-93:15:50
    pos_1:         PLATE-ID = 024P,
    pos_2:         RA = 12H 52M 26.02S +/- 0.5",
    pos_3:         DEC = -3D 57' 05.0" +/- 0.5",
    equinox:       J2000
    acqpr_1:       BKG
    comment_1:     STAR POSITION WILL BE UPDATED
    comment_2:     BEFORE OBSERVATION IS PERFORMED.
    comment_3:     CONTACT:  AMANDA S. BOSH, MIT
    comment_4:     SOLAR ELONG 171D
    fluxnum_1:     1
    fluxval_1:     V = 11.1 +/- 0.1

!

    targnum:       16
    name_1:        LS00305-OFFSET
    name_2:        GSC4953-00451
    descr_1:       OFFSET TARGET FOR LS00305
    pos_1:         PLATE-ID = 024P,
    pos_2:         RA = 12H 52M 19.60S +/- 0.5",
    pos_3:         DEC = -3D 56' 15.0" +/- 0.5",
    equinox:       J2000
    comment_1:     STAR POSITION WILL BE UPDATED
    comment_2:     BEFORE OBSERVATION IS PERFORMED.
    comment_3:     CONTACT:  AMANDA S. BOSH, MIT
    fluxnum_1:     1
    fluxval_1:     B = 15.5 +/- 0.6

!

    targnum:       17
    name_1:        U111
    name_2:        GSC6311-00105
    descr_1:       STAR TO BE OCCULTED BY URANUS.
    descr_2:       CLOSE APPROACH AT 14-APR-93:09:34
    pos_1:         PLATE-ID = 01O4,
    pos_2:         RA = 19H 36M 18.93S +/- 0.5",
    pos_3:         DEC = -22D 02' 54.1" +/- 0.5",
    equinox:       J2000
    acqpr_1:       BKG
    comment_1:     STAR POSITION WILL BE UPDATED
    comment_2:     BEFORE OBSERVATION IS PERFORMED.
    comment_3:     CONTACT:  AMANDA S. BOSH, MIT
    comment_4:     SOLAR ELONG 92D
    fluxnum_1:     1
    fluxval_1:     V = 12.6 +/- 0.5

!

    targnum:       18
    name_1:        U111-OFFSET
    name_2:        GSC67311-02120
    descr_1:       OFFSET TARGET FOR U111
    pos_1:         PLATE-ID = 01O4,
    pos_2:         RA = 19H 36M 11.62S +/- 0.5",
    pos_3:         DEC = -22D 01' 53.1" +/- 0.5",
    equinox:       J2000
    comment_1:     STAR POSITION WILL BE UPDATED
    comment_2:     BEFORE OBSERVATION IS PERFORMED.
    comment_3:     CONTACT:  AMANDA S. BOSH, MIT
    fluxnum_1:     1
    fluxval_1:     B = 14.9 +/- 0.6

!
! end of fixed targets

solar_system_targets:

  targnum:         21
    name_1:        URANUS-CENTER
    descr_1:       PLANET URANUS
    lev1_1:        STD = URANUS, ACQ = 0.1
    comment_1:     ACQUISITION TARGET FOR
    comment_2:     BACKGROUND SCANS
    fluxnum_1:     1
    fluxval_1:     V = 5.5 +/- 0.5

!

  targnum:         22
    name_1:        AGK+26D0765-BACKGROUND
    descr_1:       OFFSET MARS
    lev1_1:        STD = MARS
    lev2_1:        TYPE = POS_ANGLE,
    lev2_2:        RAD = 13.2,
    lev2_3:        ANG = 66.8,
    lev2_4:        REF = NORTH
    comment_1:     FOR USE IN A SCAN OF
    comment_2:     BACKGROUND LEVELS ALONG
    comment_3:     THE PATH OF THE OCCULTED STAR

!

  targnum:         23
    name_1:        LS00305-BACKGROUND
    descr_1:       OFFSET JUPITER
    lev1_1:        STD = JUPITER
    lev2_1:        TYPE = POS_ANGLE,
    lev2_2:        RAD = 30,
    lev2_3:        ANG = 127.5,
    lev2_4:        REF = NORTH
    comment_1:     FOR USE IN A SCAN OF
    comment_2:     BACKGROUND LEVELS ALONG
    comment_3:     THE PATH OF THE OCCULTED STAR

!

  targnum:         24
    name_1:        U111-BACKGROUND
    descr_1:       OFFSET URANUS
    lev1_1:        STD = URANUS
    lev2_1:        TYPE = POS_ANGLE,
    lev2_2:        RAD = 4.4,
    lev2_3:        ANG = 80.5,
    lev2_4:        REF = NORTH
    comment_1:     FOR USE IN A SCAN OF
    comment_2:     BACKGROUND LEVELS ALONG
    comment_3:     THE PATH OF THE OCCULTED STAR

!
! end of solar system targets

! No generic target records found

exposure_logsheet:

    linenum:       4.000
    sequence_1:    DEFINE
    sequence_2:    ONBRD-ACQ
    targname:      #
    config:        HSP/VIS
    opmode:        ACQ
    num_exp:       1
    time_per_exp:  1S
    fluxnum_1:     1
    priority:      1
    req_1:         PCS MODE F;
    comment_1:     USE FINE LOCK FOR ACQUISITION
    comment_2:     IF BRIGHT ENOUGH GUIDE STARS
    comment_3:     CAN BE FOUND.  IF NOT, COARSE
    comment_4:     TRACK IS ACCEPTABLE.

!

    linenum:       5.000
    sequence_1:    DEFINE
    sequence_2:    ONBRD-ACQC
    targname:      #
    config:        HSP/VIS
    opmode:        ACQ
    num_exp:       1
    time_per_exp:  1S
    fluxnum_1:     1
    priority:      1

!

    linenum:       6.000
    sequence_1:    DEFINE
    sequence_2:    BACK-SCAN
    targname:      #
    config:        HSP/PMT/VIS
    opmode:        SPLIT
    aperture:      1.0
    sp_element:    F750W/F320N
    num_exp:       1
    time_per_exp:  1S
    fluxnum_1:     1
    priority:      1
    param_1:       #
    req_1:         SPATIAL SCAN;
    req_2:         PCS MODE C;

!

    linenum:       7.000
    sequence_1:    DEFINE
    sequence_2:    RING-OCC
    targname:      #
    config:        HSP/PMT/VIS
    opmode:        SPLIT
    aperture:      1.0
    sp_element:    F750W/F320N
    num_exp:       1
    time_per_exp:  1M
    fluxnum_1:     1
    priority:      1
    param_1:       #
    req_1:         CRIT OBS;
    comment_1:     USE FINE LOCK FOR OBSERVATION
    comment_2:     IF BRIGHT ENOUGH GUIDE STARS
    comment_3:     CAN BE FOUND.  IF NOT, COARSE
    comment_4:     TRACK IS ACCEPTABLE.

!

    linenum:       20.010
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      AGK+26D0765-BACKGROUND
    time_per_exp:  X115
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,
    req_1:         SEQ 20.01 - 20.03;
    req_2:         GROUP 20.01 - 20.04 WITHIN 9H;
    req_3:         CYCLE 2/20.01 - 20.28;

!

    linenum:       20.020
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      AGK+26D0765-BACKGROUND
    time_per_exp:  X115
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,

!

    linenum:       20.030
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      AGK+26D0765-BACKGROUND
    time_per_exp:  X115
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,

!

    linenum:       20.040
    sequence_1:    USE
    sequence_2:    ONBRD-ACQ
    targname:      AGK+26D0765-OFFSET
    time_per_exp:  X40
    req_1:         ONBOARD ACQ FOR 20.10;
    req_2:         SEQ 20.04 - 20.10 NO GAP;

!

    linenum:       20.100
    sequence_1:    USE
    sequence_2:    RING-OCC
    targname:      AGK+26D0765
    time_per_exp:  X20
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,
    req_1:         AT 14-JAN-93:00:55 +/- 6M;
    comment_1:     END EXPOSURE AT 14-JAN-93:01:15.
    comment_2:     THE "AT" REQUIREMENT IS REALLY +/-
    comment_3:     1M, BUT WE NEEDED TO MAKE IT +/- 6M
    comment_4:     TO AVOID THE ABOLUTE COMMANDING TRANS
    comment_5:     INSERTS FOR "AT" WINDOWS OF +/- 5M OR
    comment_6:     LESS.

!

    linenum:       20.260
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      AGK+26D0765-BACKGROUND
    time_per_exp:  X115
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,
    req_1:         SEQ 20.26 - 20.28;
    req_2:         GROUP 20.1 - 20.28 WITHIN 9H;

!

    linenum:       20.270
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      AGK+26D0765-BACKGROUND
    time_per_exp:  X115
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,

!

    linenum:       20.280
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      AGK+26D0765-BACKGROUND
    time_per_exp:  X115
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,

!

    linenum:       30.010
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      LS00305-BACKGROUND
    time_per_exp:  X260
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,
    req_1:         SEQ 30.01 - 30.03;
    req_2:         GROUP 30.01 - 30.040 WITHIN 9H;
    req_3:         CYCLE 2/30.01 - 30.20;

!

    linenum:       30.020
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      LS00305-BACKGROUND
    time_per_exp:  X260
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,

!

    linenum:       30.030
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      LS00305-BACKGROUND
    time_per_exp:  X260
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,

!

    linenum:       30.040
    sequence_1:    USE
    sequence_2:    ONBRD-ACQ
    targname:      LS00305-OFFSET
    time_per_exp:  X200
    req_1:         ONBOARD ACQ FOR 30.10;
    req_2:         SEQ 30.04 - 30.10 NO GAP;

!

    linenum:       30.100
    sequence_1:    USE
    sequence_2:    RING-OCC
    targname:      LS00305
    time_per_exp:  X30
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,
    req_1:         AT 25-FEB-93:14:01 +/- 6M;
    comment_1:     END EXPOSURE AT 25-FEB-93:14:30.
    comment_2:     THE "AT" IS REALLY +/- 1M.  SEE LINE
    comment_3:     20.1 COMMENT.

!

    linenum:       30.140
    sequence_1:    USE
    sequence_2:    ONBRD-ACQ
    targname:      LS00305-OFFSET
    time_per_exp:  X200
    req_1:         ONBOARD ACQ FOR 30.20;
    req_2:         SEQ 30.14 - 30.20 NO GAP;

!

    linenum:       30.200
    sequence_1:    USE
    sequence_2:    RING-OCC
    targname:      LS00305
    time_per_exp:  X30
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 10000,
    req_1:         AT 25-FEB-93:17:11 +/- 6M;
    comment_1:     END EXPOSURE AT 25-FEB-93:17:40.
    comment_2:     THE "AT" IS REALLY +/- 1M.  SEE LINE
    comment_3:     20.1 COMMENT.

!

    linenum:       40.000
    sequence_1:    USE
    sequence_2:    ONBRD-ACQC
    targname:      URANUS-CENTER
    time_per_exp:  X4
    req_1:         ONBOARD ACQ FOR 40.01;
    req_2:         SEQ 40.00 - 40.01 NO GAP;

!

    linenum:       40.010
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      U111-BACKGROUND
    time_per_exp:  X133
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 1000,
    req_1:         SEQ 40.01 - 40.03;
    req_2:         GROUP 40.01 - 40.04 WITHIN 9H;
    req_3:         CYCLE 2/40.00 - 40.28;

!

    linenum:       40.020
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      U111-BACKGROUND
    time_per_exp:  X133
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 1000,

!

    linenum:       40.030
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      U111-BACKGROUND
    time_per_exp:  X133
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 1000,

!

    linenum:       40.040
    sequence_1:    USE
    sequence_2:    ONBRD-ACQ
    targname:      U111-OFFSET
    time_per_exp:  X100
    req_1:         ONBOARD ACQ FOR 40.10;
    req_2:         SEQ 40.04 - 40.10 NO GAP;

!

    linenum:       40.100
    sequence_1:    USE
    sequence_2:    RING-OCC
    targname:      U111
    time_per_exp:  X150
    param_1:       SAMPLE-TIME = 0.1,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 1000,
    req_1:         AT 14-APR-93:07:11 +/- 6M;
    comment_1:     END EXPOSURE AT 14-APR-93:12:10.
    comment_2:     THE "AT" IS REALLY +/- 1M.  SEE LINE
    comment_3:     20.1 COMMENT.

!

    linenum:       40.250
    sequence_1:    USE
    sequence_2:    ONBRD-ACQC
    targname:      URANUS-CENTER
    time_per_exp:  X4
    req_1:         ONBOARD ACQ FOR 40.26;
    req_2:         SEQ 40.25 - 40.28 NO GAP;

!

    linenum:       40.260
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      U111-BACKGROUND
    time_per_exp:  X133
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 1000,
    req_1:         SEQ 40.26 - 40.28;
    req_2:         GROUP 40.10 - 40.28 WITHIN 9H;

!

    linenum:       40.270
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      U111-BACKGROUND
    time_per_exp:  X133
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 1000,

!

    linenum:       40.280
    sequence_1:    USE
    sequence_2:    BACK-SCAN
    targname:      U111-BACKGROUND
    time_per_exp:  X133
    param_1:       SAMPLE-TIME = 0.05,
    param_2:       PRECISION = HIGH,
    param_3:       DATA-FORMAT = ALL,
    param_4:       PMT-ANALOG = 10000,
    param_5:       VIS-ANALOG = 1000,

!
! end of exposure logsheet

scan_data:

    line_list:     20.01, 20.03, 20.26, 20.28
    fgs_scan:
    cont_dwell:    C
    dwell_pnts:    0
    dwell_secs:       0.00
    scan_width:       0.0000
    scan_length:     83.0000
    sides_angle:    90.0000
    number_lines:  1
    scan_rate:       0.2000
    first_line_pa: 277.6500
    scan_frame:    CEL
    len_offset:    0.
    wid_offset:    0.

!

    line_list:     20.02, 20.27
    fgs_scan:
    cont_dwell:    C
    dwell_pnts:    0
    dwell_secs:       0.00
    scan_width:       1.0000
    scan_length:     83.0000
    sides_angle:    90.0000
    number_lines:  3
    scan_rate:       0.2000
    first_line_pa: 277.6500
    scan_frame:    CEL
    len_offset:    0.
    wid_offset:    0.5

!

    line_list:     30.01, 30.03
    fgs_scan:
    cont_dwell:    C
    dwell_pnts:    0
    dwell_secs:       0.00
    scan_width:       0.0000
    scan_length:    112.0000
    sides_angle:    90.0000
    number_lines:  1
    scan_rate:       0.2000
    first_line_pa: 295.1000
    scan_frame:    CEL
    len_offset:    0.
    wid_offset:    0.

!

    line_list:     30.02
    fgs_scan:
    cont_dwell:    C
    dwell_pnts:    0
    dwell_secs:       0.00
    scan_width:       1.0000
    scan_length:    112.0000
    sides_angle:    90.0000
    number_lines:  3
    scan_rate:       0.2000
    first_line_pa: 295.1000
    scan_frame:    CEL
    len_offset:    0.
    wid_offset:    0.5

!

    line_list:     40.01, 40.03, 40.26, 40.28
    fgs_scan:
    cont_dwell:    C
    dwell_pnts:    0
    dwell_secs:       0.00
    scan_width:       0.0000
    scan_length:     32.5000
    sides_angle:    90.0000
    number_lines:  1
    scan_rate:       0.0750
    first_line_pa: 263.6000
    scan_frame:    CEL
    len_offset:    0.
    wid_offset:    0.

!

    line_list:     40.02, 40.27
    fgs_scan:
    cont_dwell:    C
    dwell_pnts:    0
    dwell_secs:       0.00
    scan_width:       1.0000
    scan_length:     32.5000
    sides_angle:    90.0000
    number_lines:  3
    scan_rate:       0.0750
    first_line_pa: 263.6000
    scan_frame:    CEL
    len_offset:    0.
    wid_offset:    0.5

!
! end of scan data