!  File:  1123C.PROP
!  Database:  PEPDB
!  Date:  16-FEB-1994:02:38:21

coverpage:

  title_1:         MERCURY JOINT PROJECT WITH CALDWELL (WF/PC-19):
    title_2:       CYCLE 3 AND FUTURE-CYCLE CONTINUATION
    sci_cat:       SOLAR SYSTEM
    proposal_for:  GTO/WFC
    pi_title:      PROF.
    pi_fname:      JAMES
    pi_mi:         A.
    pi_lname:      WESTPHAL
    pi_inst:       CALTECH
    pi_country:    USA
    pi_phone:      (818) 356-4900
    keywords_1:    MERCURY, SURFACE PHOTOMETRY, CRATER COUNTS
    hours_pri:     0.20
    num_pri:       1
    pi_position:   PROFESSOR OF PLANETA
! end of coverpage

abstract:

    line_1:        We propose to take high resolution, multispectral images of the planet Mercury
    line_2:        with the WF/PC using the Earth to shield the Sun. The data will be taken as
    line_3:        Mercury rises above the Earth's limb. These data should obtain images with a
    line_4:        resolution of 30 km on the side of Mercury not seen by the Mariner 10
    line_5:        spacecraft.

!
! end of abstract

general_form_proposers:

  lname:           WESTPHAL
    fname:         JAMES
    mi:            A.
    inst:          CALTECH
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        Because Mercury is always within 28 degrees of the Sun when viewed from the
    line_2:        Earth, special caution must be taken to insure the HST does not emerge inside
    line_3:        the 50 degree avoidance zone. Mercury can be viewed with HST by using the Earth
    line_4:        as an 'occulting disk. Tau AS Mercury rises above the Earth limb, the HST is
    line_5:        slewed into position to view Mercury rises while the Sun is occulted. The
    line_6:        aviblable time to view Mercury varies linearly with the elongation and is about
    line_7:        4.2 minutes at 28 degrees elongation. Only one or two exposures cn be taken
    line_8:        before the HST must be slewed away from the rising sun.
    line_10:       comment continued from CP 11: Special Requirements: Special HST acquisition
    line_11:       procedures will have to be developed; planetary tracking required.

!

  question:        13
    section:       1
    line_1:        We propose to take high resolution, multispectral images of the planet mercury
    line_2:        with the WF/PC using the Earth to shield the Sun. The data will be taken as
    line_3:        Mercury rises above the Earth's limb. These data should obtain images with
    line_4:        resolution of 30 km on the side of mercury not seen by the mariner 10
    line_5:        spacecraft.

!
!end of general form text

general_form_address:

  lname:           GUNN
    fname:         JAMES
    mi:            E.
    category:      CON
    inst:          PRINCETON UNIVERSITY
    addr_1:        ASTROPHYSICAL SCIENCE
    addr_2:        PEYTON HALL
    city:          PRINCETON
    state:         NJ
    zip:           08540
    country:       USA

!

  lname:           BAUM
    fname:         WILLIAM
    category:      CON
    inst:          LOWELL OBSERVATORY
    addr_1:        PLANETARY RESEARCH CENTER
    addr_2:        P.O. BOX 1269
    city:          FLAGSTAFF
    state:         AZ
    zip:           86002
    country:       USA

!

  lname:           DANIELSON
    fname:         G. EDWARD
    category:      CON
    inst:          CALTECH
    addr_1:        M/S 170-25
    addr_2:        DIVISION OF GEOLOGICAL & PLANETARY SCIENCES
    city:          PASADENA
    state:         CA
    zip:           91125
    country:       USA
    phone:         (818) 356-6861

!

  lname:           WESTPHAL
    fname:         JAMES
    mi:            A.
    title:         PROF.
    category:      PI
    inst:          CALTECH
    addr_1:        M/S 170-25
    addr_2:        DIVISION OF GEOLOGICAL
    addr_3:        & PLANETARY SCIENCES
    city:          PASADENA
    state:         CA
    zip:           91125
    country:       USA
    phone:         (818) 356-4900

!
! end of general_form_address records

! No fixed target records found

solar_system_targets:

  targnum:         1
    name_1:        MERCURY
    descr_1:       PLANET MERCURY
    lev1_1:        STD = MERCURY
    comment_1:     WITHIN 50 DEG SUN CONSTRAINT -
    comment_2:     SPECIAL TARGET ACQUISITION NEEDED

!
! end of solar system targets

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    targname:      MERCURY
    config:        PC
    opmode:        IMAGE
    aperture:      PC6
    sp_element:    F336W
    num_exp:       1
    time_per_exp:  1.6S
    priority:      1
    req_1:         CYCLE 4 / 1-4;
    req_2:         COND IF TAC OK / 1-4;
    req_3:         GROUP 1-4 WITHIN 2D;
    comment_1:     THIS IS THE CYCLE 9 VERSION OF THIS
    comment_2:     PROPOSAL: TRL/RML 3/25/91  16:45.

!

    linenum:       2.000
    targname:      ^
    config:        ^
    opmode:        ^
    aperture:      ^
    sp_element:    F517N
    num_exp:       ^
    time_per_exp:  0.18S
    priority:      ^
    req_1:         ^

!

    linenum:       3.000
    targname:      ^
    config:        ^
    opmode:        ^
    aperture:      ^
    sp_element:    F889N
    num_exp:       ^
    time_per_exp:  0.4S
    priority:      ^
    req_1:         ^

!

    linenum:       4.000
    targname:      ^
    config:        ^
    opmode:        ^
    aperture:      ^
    sp_element:    F1042M
    num_exp:       ^
    time_per_exp:  0.12S
    priority:      ^
    req_1:         ^
    comment_1:     TIME ON TARGET MAY ONLY PERMIT 1 OR 2
    comment_2:     EXPOSURES PRIOR TO REACHING THE TIME
    comment_3:     NEEDED TO SLEW AWAY TO AVOID THE SUN

!
! end of exposure logsheet

! No scan data records found