!  File:  4965C.PROP
!  Database:  PEPDB
!  Date:  23-FEB-1994:12:46:02

coverpage:

  title_1:         STRUCTURE AND COMPOSITION OF TITAN'S ATMOSPHERE:CYCLE 3
    title_2:       HIGH
    sci_cat:       SOLAR SYSTEM
    sci_subcat:    MINOR PLANETS
    proposal_for:  GTO/OS
    pi_fname:      JOHN
    pi_mi:         J.
    pi_lname:      CALDWELL
    pi_inst:       YORK UNIVERSITY
    pi_country:    CANADA
    pi_phone:      (416) 665-5449
    keywords_1:    TITAN, ATMOSPHERIC CHEMISTRY
    hours_pri:     3.00
    num_pri:       1
    pi_position:   PROFESSOR
! end of coverpage

abstract:

    line_1:        Titan will be observed with the FOS G270H, to search for discrete
    line_2:        absorption features and continuum Rayleigh scattering.  Rayleigh
    line_3:        scattering has not previously been detected from Titan by the OAO-2
    line_4:        and IUE spacecraft, despite the very thick atmosphere there, because
    line_5:        of strong absorption by quasi-organic material.

!
! end of abstract

general_form_proposers:

  lname:           CALDWELL
    fname:         JOHN
    mi:            J.
    inst:          YORK UNIVERSITY
    country:       CANADA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        FOS spectra with G270H will be examined for signatures of trace
    line_2:        species such as C4H2.

!

  question:        4
    section:       1
    line_1:        ST observations are required for their high spatial resolution, and for access
    line_2:        to the ultraviolet between 2000 and 3000 A. Ground-based observations are
    line_3:        completely irrelevant to this study.

!

  question:        6
    section:       1
    line_1:        Schedule near opposition if practical.

!

  question:        7
    section:       1
    line_1:        The spectra will be divided by a published Solar spectrum to give an albedo
    line_2:        curve, which will then be examined for discrete absorption features. The
    line_3:        continuum reflectivity will also be compared to atmospheric models. The
    line_4:        altitude of the ultraviolet absorbing layer can be estimated because the
    line_5:        continuum opacity, Rayleigh scattering, can be modelled very accurately.

!

  question:        8
    section:       1
    line_1:        Schedule near opposition if practical.

!

  question:        10
    section:       1
    line_1:        We have access to dedicated SUN4/280 computer system for ST data
    line_2:        analysis.

!

  question:        13
    section:       1
    line_1:        Ultraviolet spectroscopy of Titan will be analyzed for discrete absorption
    line_2:        features and for spectral continuum trends.

!
!end of general form text

general_form_address:

  lname:           CALDWELL
    fname:         JOHN
    mi:            J.
    title:         DR.
    category:      PI
    inst:          YORK UNIVERSITY
    addr_1:        PHYSICS DEPARTMENT
    city:          NORTH YORK
    state:         ON
    zip:           M3J 1P3
    country:       CANADA
    phone:         (416) 665-5449

!
! end of general_form_address records

! No fixed target records found

solar_system_targets:

  targnum:         1
    name_1:        TITAN
    descr_1:       SATELLITE TITAN
    lev1_1:        STD = SATURN
    lev2_1:        STD = TITAN
    wind_1:        SEP OF TITAN SATURN FROM EARTH GT 30"
    fluxnum_1:     1
    fluxval_1:     V=8.4
    fluxnum_2:     2
    fluxval_2:     F(2200)=4.5E-15
    fluxnum_3:     3
    fluxval_3:     F(2000)=5E-16

!

  targnum:         2
    name_1:        RHEA
    descr_1:       SATELLITE RHEA
    lev1_1:        STD = SATURN
    lev2_1:        STD = RHEA
    wind_1:        SEP OF TITAN RHEA FROM EARTH LT 80"
    fluxnum_1:     1
    fluxval_1:     V=9.7
    fluxnum_2:     2
    fluxval_2:     B-V=0.78

!
! end of solar system targets

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    targname:      RHEA
    config:        FOS/BL
    opmode:        ACQ/BINARY
    aperture:      4.3
    sp_element:    MIRROR
    num_exp:       1
    time_per_exp:  0.66S
    s_to_n:        20
    fluxnum_1:     1
    priority:      1
    param_1:       FAINT=2050, BRIGHT=103000,
    req_1:         ONBOARD ACQ FOR 2;
    comment_1:     ALL EXPOSURES MUST BE TAKEN
    comment_2:     WITH THE SAME GUIDE-STARS.

!

    linenum:       2.000
    targname:      TITAN
    config:        FOS/BL
    opmode:        ACQ/FIRMWARE
    aperture:      4.3
    sp_element:    MIRROR
    num_exp:       1
    time_per_exp:  0.96S
    s_to_n:        20
    fluxnum_1:     1
    priority:      1
    param_1:       MAP=FINE,
    req_1:         SEQ 1-4 NO GAP;
    req_2:         CYCLE 3 / 1-4;
    req_3:         ONBOARD ACQ FOR 3;

!

    linenum:       3.000
    targname:      TITAN
    config:        FOS/BL
    opmode:        ACCUM
    aperture:      1.0
    sp_element:    G270H
    wavelength:    2230-3309
    num_exp:       1
    time_per_exp:  24.5M
    s_to_n:        50
    fluxnum_1:     2
    priority:      1
    comment_1:     SCHEDULE NEAR OPPOSITION IF
    comment_2:     PRACTICAL, TO MAXIMIZE FLUX.

!

    linenum:       4.000
    targname:      TITAN
    config:        FOS/BL
    opmode:        ACQ
    aperture:      4.3
    sp_element:    MIRROR
    wavelength:    2230-3309
    num_exp:       1
    time_per_exp:  3.84S
    s_to_n:        20
    fluxnum_1:     1
    priority:      1
    req_1:         SEQ 3-4 NON-INT;

!
! end of exposure logsheet

! No scan data records found