!   $Id: 5341,v 8.1 1994/08/18 20:58:22 pepsa Exp $

coverpage:

  title_1:         HIGH RESOLUTION IMAGING OF SATURN'S UV AURORA: CYCLE4MEDIUM
    sci_cat:       SOLAR SYSTEM
    sci_subcat:    GIANT PLANETS
    proposal_for:  GO
    pi_fname:      JEAN-CLAUDE
    pi_mi:         MC
    pi_lname:      GERARD
    pi_inst:       UNIVERSITE DE LIEGE
    pi_country:    BELGIUM
    pi_phone:      32-41-529980
    hours_pri:     3.00
    num_pri:       1
    foc:           Y
    off_fname:     JAN
    off_lname:     BERNARD
    off_title:     CONSEILLER
    off_inst:      SERVICE DE PROGRAMMATION 	 DE LA POLITIQUE SCIENTIFIQUE
    off_addr_1:    RUE DE LA SCIENCE, NB 8
    off_city:      BRUXELLES
    off_zip:       1040
    off_country:   BELGIUM
    off_phone:     32-2-2383583
! end of coverpage

abstract:

    line_1:        Previous HST observations made with the FOC have demonstrated the ability of
    line_2:        the HST to provide high spatial resolution images of the ultraviolet jovian
    line_3:        aurora.  We propose to take advantage of the restored post-COSTAR spatial
    line_4:        resolution of the FOC to obtain high resolution images of the
    line_5:        north UV SATURN aurora. Saturn's UV aurora will be imaged for the first
    line_6:        time.  A complete rotation of the north polar region will be observed with the
    line_7:        FOC nearly 12 years after the Voyager flyby.  These discovery measurements are
    line_8:        expected to provide a wealth of new information concerning the intensity,
    line_9:        morphology, time variation and relation with the polar haze present at high
    line_10:       latitudes.

!
! end of abstract

general_form_proposers:

  lname:           GERARD
    fname:         JEAN-CLAUDE
    mi:            MC
    inst:          4330
    country:       BELGIUM
    esa:           Y

!

  lname:           DOLS
    fname:         VINCENT
    mi:            J.
    inst:          4330
    country:       BELGIUM
    esa:           Y

!

  lname:           PRANGE
    fname:         RENEE
    inst:          5448
    country:       FRANCE
    esa:           Y

!

  lname:           PARESCE
    fname:         FRANCESCO
    inst:          3470
    country:       USA
    esa:           Y

!

  lname:           WAITE
    fname:         HUNTER
    mi:            J.
    inst:          3440
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        We plan to
    line_2:        explore with the improved spatial resolution (and the subsequent increased
    line_3:        sensitivity to near point objects) the morphology of the Saturnian aurora by
    line_4:        imaging the north polar region of the planet.
    line_5:        Based on the accumulated experience of the team in the use of the FOC to image
    line_6:        the UV aurora with the FOC, we know that these objectives will be best achieved
    line_7:        by using the camera in the following configuration:
    line_8:        - F/96 optical relay in the 512zx1024 zoomed pixel format (14x14 arcsec)
    line_9:        -8-bit words
    line_10:       -F152M+F175W filters
    line_11:       This filter combination was successfully used in GTO program 1269. Previous
    line_12:       onservations have shown that the count rate is well below saturation of the
    line_13:       8-bit words.
    line_14:       The SATURNIAN AURORA program is exploratory. it will consist in a series of
    line_15:       8 images taken on consecutive HST orbits over more than a Saturn rotation.
    line_16:       It will start at a phase when the CML longitude is in the sector where the
    line_17:       Voyager UVS detected the most intense auroral emission.
    line_18:       The program will be implemented as follows:
    line_19:       1- A near UV image of Saturn's north polar region to define the location of the
    line_20:       planetary limb
    line_21:       2- One 20-min exposure of the north aurora at 153 nm for initial CML longitude
    line_22:       50 <Lambda< 180 deg.
    line_23:       3- Exposure (2) is repeated during the following 7 consecutive HST orbits in

!

  question:        3
    section:       2
    line_1:        order to cover a full Saturn rotation and overlap with the initial longitude
    line_2:        sector to search for possible time variations.

!

  question:        4
    section:       1
    line_1:        The IMAGING CAPABILITY of the FOC/HST in the ultraviolet is unique and essential
    line_2:        to reach our scientific objectives.  No other spacecraft or ground equipment can
    line_3:        provide images of the UV Saturnian aurora.
    line_4:        So far,  Voyager UVS, IUE
    line_5:        and HST observations have provided important information on the morphology of
    line_6:        the UV jovian aurora, thereby opening a new era of scientific study of Jupiter
    line_7:        's magnetospheric environment and physical processes.  Previous
    line_8:        FOC/HST observations have demonstrated the ability of HST to monitor the spatial
    line_9:        distribution of auroral phenomena from Earth orbit.
    line_10:       In the
    line_11:       case of Saturn's aurora, the information provided by UVS was extremely limited
    line_12:       due to the relative sizes of the spectrometer slit and the auroral oval.
    line_13:       The Voyager UVS measurements have clearly established the
    line_14:       existence of a region of auroral emission surrounding the poles whose global
    line_15:       exists concerning the exact location of the emission, its latitudinal and
    line_16:       longitudinal extent, the intrinsic brightness of the aurora and its exact
    line_17:       relation with the radio kilometric emission.  It has therefore been very
    line_18:       difficult until now to build models of the specific origin of the precipitating
    line_19:       particles and to derive energy fluxes into the planets' upper atmospheres.
    line_20:       This program provides a unique opportunity to accomplish a major step towards
    line_21:       the understanding of the saturnian magnetospheric physics using an
    line_22:       approach whose feasibility was now been clearly demonstrated with previous
    line_23:       HST observations of the Jovian aurora.

!

  question:        5
    section:       1
    line_1:        This program is not time-critical.  However, the observations will be best at or
    line_2:        near Saturn's opposition when the angle subtended by the auroral
    line_3:        ovals is maximum.  This is NOT however a condition.

!

  question:        6
    section:       1
    line_1:

!


!


!

  question:        8
    section:       1
    line_1:

!

  question:        9
    section:       1
    line_1:        1.  GTO program 1269 (F.  Paresce, PI)
    line_2:        2.  GO cycle 3 program 4608,(J.C. Gerard, PI)
    line_3:        3.  Discretionary time (ID 4005),(Stern, PI;  Waite, Co-I)
    line_4:        4.  GTO/FOC 1253, (F.Paresce, PI)
    line_5:        5.  GO 3511, ( J.Clarke, PI;  R.  Prange, Co-I)
    line_6:        PUBLICATIONS:
    line_7:        First Results from the FOC:  Imaging the Core of R Aqr, F.  Paresce et al.,Ap.
    line_8:        J.  Lett., 369, L67, 1991
    line_9:        Blue Stragglers in the Core of the Globular Cluster 47 Tuc, F.Paresce et al.,
    line_11:       Nature, 232, 297, 1991
    line_12:       Io surface ultraviolet imaging with the HST Near UV imaging of Jupiter's
    line_13:       satellite Io with HST, Astron.  Astrophys, 1992.
    line_14:       Far ultraviolet imaging of the jovian aurora with the Hubble Space Telescope V.
    line_15:       Dols et al, Geophys.  Res. Lett., 19, 1803,  1992.
    line_16:       High resolution near UV observation of Jupiter's satellite Io with the HST, F.
    line_17:       Paresce et al, Proceedings of the HST Workshop, Sardinia, 493, 1992.
    line_18:       Far ultraviolet imaging of Jupiter's northern polar regions with the FOC J.C.
    line_19:       Gerard et al, Proceedings of the HST Workshop, Sardinia, 505, 1992.
    line_20:       The Structure of the Inner Arcsecond of R Aqr observed with HST, D.Burgarella
    line_21:       and F. Paresce, Ap.  J.  Lett., 389, L29, 1992
    line_22:       Solar system observations with HST, F.  Paresce and J.C.  Gerard, in Proceedings
    line_23:       of the International Space Year Conference Munich, 1992, in press.

!

  question:        9
    section:       2
    line_1:        High resolution near UV observation of Jupiter's satellite Io with the Hubble
    line_2:        Space Telescope, V.  Dols et al, paper presented at the EGS General
    line_3:        Assembly, Edinburgh, Ann.  Geophys.  Suppl., 10, C498, 1992.
    line_4:        First Ly-alpha images of the jovian aurora with the HST, J.C.  Gerard et al.,
    line_5:        abstract, presented at the EGS General Assembly, Edingburgh, April 1992.
    line_6:        Multispectral Observations of Jovian Aurora, H.  Waite et al., abstract, paper
    line_7:        presented at the UCLA conference, June 22-26 and at the Variable Phenomena in
    line_8:        Jovian Planetary Systems, Annapolis July 13-16, 1992.
    line_9:        Analysis of the first image of the the jovian aurora at Lyman alpha obtained
    line_10:       with the HST, R.  Prange et al, paper presented at the conference "Variable
    line_11:       phenomena in jovian planetary systems", Annapolis, July 13-16, 1992.
    line_12:       Observations of the H and H2 ultraviolet aurora with the HST Faint Object Camera
    line_13:       , J.C.  Gerard et al, abstract, DPS meeting,Munich, 1992.
    line_14:       High resolution observations of the morphology of the Jovian far UV aurora with
    line_15:       the HST, V.Dols et al,EGS General Assembly, Ann. Geophys. Suppl., 11, C492, 1993
    line_16:       Field aligned currents and auroral emission in the Jovian magnetosphere, M.K
    line_17:       Dougherty et al., idem, C493, 1993.
    line_18:       Far UV imaging of Saturn and its rings with the HST,J.C. Gerard et al,
    line_19:       idem, C461, 1993.

!

  question:        10
    section:       1
    line_1:        - workstations are available in several institutions for data reduction, fitting
    line_2:        and comparison with models -university computer time is available in all
    line_3:        institutions for numerical modeling and comparison with data -1 full time
    line_4:        research assistant in atmospheric physics (PRODEX ESA program) funded by the
    line_5:        Belgian Government for HST data analysis -1 graduate student in plasma physics
    line_6:        (France) and one graduate student in astrophysics (Liege).
    line_7:        - Funds are available for this project through various scientific agencies:
    line_8:        SPPS(B), CNRS(F), NASA and ESA.  Financial support is requested by the US Co-I.

!
!end of general form text

general_form_address:

  lname:           GERARD
    fname:         JEAN-CLAUDE
    mi:            MC
    category:      PI
    inst:          4330
    addr_1:        AVENUE DE COINTE, NB 5
    city:          LIEGE
    zip:           4000
    country:       BELGIUM
    phone:         32-41-529980
    telex:         (EMAIL):GERARD AT ASTRO.ULG.AC.BE (FAX):32-41-527474

!

  lname:
    category:      CON

!
! end of general_form_address records

! No fixed target records found

solar_system_targets:

  targnum:         1
    name_1:        LIMBSAT
    descr_1:       FEATURE SATURN
    lev1_1:        STD = SATURN
    lev2_1:        TYPE=TORUS, LONG=0,LAT=34.5,
    lev2_2:        RAD=58187,POLE_LAT=90       
    comment_1:     THIS PROGRAM SHOULD PREFERABLY TAKE
    comment_2:     PLACE CLOSE TO OPPOSITION .
    comment_4:     CENTER OF FOV
    comment_5:     SHOULD BE POINTED ON THE PLANETARY
    comment_6:     SPIN AXIS, TOWARDS NORTH POLE, TO
    comment_7:     THE PLANETOGRAPHIC PARALLEL EQUAL
    comment_8:     40D NORTH

!

  targnum:         2
    name_1:        SATNORTH1
    descr_1:       FEATURE SATURN
    lev1_1:        STD = SATURN
    lev2_1:        TYPE=TORUS, LONG=0,LAT=34.5,
    lev2_2:        RAD=58187,POLE_LAT=90       
    wind_1:        CML OF SATURN FROM EARTH
    wind_2:        BETWEEN 120 200
    comment_1:     THIS PROGRAM SHOULD PREFERABLY TAKE
    comment_2:     PLACE CLOSE TO OPPOSITION .
    comment_4:     CENTER OF FOV
    comment_5:     SHOULD BE POINTED ON THE PLANETARY
    comment_6:     SPIN AXIS, TOWARDS NORTH POLE, TO
    comment_7:     THE PLANETOGRAPHIC PARALLEL EQUAL
    comment_8:     40D NORTH

!
! end of solar system targets

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    sequence_1:    DEFINE
    sequence_2:    ORBIT
    targname:      #
    config:        FOC/96
    opmode:        IMAGE
    aperture:      512X1024
    sp_element:    F152M,F175W
    num_exp:       1
    time_per_exp:  900S
    priority:      #
    param_1:       PIXEL= 50X25
    param_2:       CHECK-FILTER=YES
    req_1:         CYCLE 4;

!

    linenum:       2.000
    targname:      LIMBSAT
    config:        FOC/96
    opmode:        IMAGE
    aperture:      512X1024
    sp_element:    F210M,F220W,F2ND
    num_exp:       1
    time_per_exp:  1000S
    priority:      1
    param_1:       PIXEL= 50X25
    param_2:       CHECK-FILTER=YES
    req_1:         CYCLE 4;
    req_2:         PCS MODE F / 2-10;
    req_3:         BEFORE 3 BY 96M +/- 20M;

!

    linenum:       3.000
    sequence_1:    USE ORBIT
    targname:      SATNORTH1
    priority:      1
    req_2:         SEQ 3-10;

!

    linenum:       4.000
    sequence_1:    USE ORBIT
    targname:      LIMBSAT
    priority:      1
    req_2:         AFTER 3 BY 96M +/- 20M ;
    comment_1:     EXPOSURE  TAKEN 1 HST ORBIT AFTER
    comment_2:     EXPOSURE 3

!

    linenum:       5.000
    sequence_1:    USE ORBIT
    targname:      LIMBSAT
    priority:      1
    req_2:         AFTER 4 BY 96M +/- 20M ;
    comment_1:     EXPOSURE  TAKEN 1 HST ORBIT AFTER
    comment_2:     EXPOSURE 4

!

    linenum:       6.000
    sequence_1:    USE ORBIT
    targname:      LIMBSAT
    priority:      1
    req_2:         AFTER 5 BY 96M +/- 20M ;
    comment_1:     EXPOSURE  TAKEN 1 HST ORBIT AFTER
    comment_2:     EXPOSURE 5

!

    linenum:       7.000
    sequence_1:    USE ORBIT
    targname:      LIMBSAT
    priority:      1
    req_2:         AFTER 6 BY 96M +/- 20M ;
    comment_1:     EXPOSURE  TAKEN 1 HST ORBIT AFTER
    comment_2:     EXPOSURE 6

!

    linenum:       8.000
    sequence_1:    USE ORBIT
    targname:      LIMBSAT
    priority:      1
    req_2:         AFTER 7 BY 96M +/- 20M ;
    comment_1:     EXPOSURE  TAKEN 1 HST ORBIT AFTER
    comment_2:     EXPOSURE 7

!

    linenum:       9.000
    sequence_1:    USE ORBIT
    targname:      LIMBSAT
    priority:      1
    req_2:         AFTER 8 BY 96M +/- 20M ;
    comment_1:     EXPOSURE  TAKEN 1 HST ORBIT AFTER
    comment_2:     EXPOSURE 8

!

    linenum:       10.000
    sequence_1:    USE ORBIT
    targname:      LIMBSAT
    priority:      1
    req_2:         AFTER 9 BY 96M +/- 20M ;
    comment_1:     EXPOSURE  TAKEN 1 HST ORBIT AFTER
    comment_2:     EXPOSURE 9

!
! end of exposure logsheet

! No scan data records found