7317( 7) - 08/23/00 15:58 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 7317 Version: 7 Check-in Date: 23-Aug-2000 15:57:38 1.Proposal Title: Spatial Distribution of Ozone and Sulfur Dioxide on Ganymede and Europa ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 7 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Keith Noll Space Telescope Science Institute CoI: Robert Johnson University of Virginia N CoI: Arthur Lane Jet Propulsion Laboratory N CoI: Deborah Domingue Lunar and Planetary Institute N CoI: John Spencer Lowell Observatory N CoI: Wendy Calvin United States Geological Service N ------------------------------------------------------------------------------------ 5. Abstract The discovery of O_2 and O_3 in spectra of Ganymede's trailing hemisphere has revealed its icy surface to be an unexpectedly complex and dynamic environment. Europa, exposed to a slightly different radiation environment, has SO_2 on its trailing hemisphere with no trace of either O_3 or O_2. What role is played by plasma composition and energy, surface-ice composition, surface temperature, porosity, global magnetic field, or other possible physical parameters in determining whether oxygen or sulfur-bearing molecules, and how much, will be produced is unknown. Scant existing data on spatial distributions of these molecules suggests that the simplest model, abundance peaking at the antapex of orbital motion and decreasing symmetrically away from that point is inadequate. The new capability to measure spectra at 0.1 arcsec spatial scales offered by STIS gives us the opportunity to address such questions by mapping the distribution of O_3 and OH on Ganymede and SO_2 on Europa. In addition, STIS can obtain the first albedo spectra of these satellites at wavelengths below ~ 210 nm because STIS will not be sensitive to scattered visible light as was the FOS. Understanding the details of how the ice of Europa and Ganymede are chemically processed will help to determine whether ion- surface systems should be expected on other icy satellites outside the Jupiter system. ------------------------------------------------------------------------------------ 7317( 7) - 08/23/00 15:58 - [ 2] Observations Description ------------------------ We propose a 16 orbit program divided into 5 separate visits. Our main emphasis will be on Ganymede with 3 visits and a total of 12 orbits. Two visits are dedicated to Europa with a total of 4 orbits. The goal of the program is to obtain spectral image cubes of the trailing hemispheres of each satellite by stepping the 52\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\x0.1 arcsec slit in steps of 0.1 arcsec so that the observed hemisphere is completely covered. For Ganymede with an angular diameter of 1.7 arcsec near opposition this requires a total of 17 steps to cover the disk, for Europa with an angular diameter of 1.0 arcsec we would require 10 steps. We will use two gratings, the G230L with the NUV MAMA detector and the G430L with the CCD to obtain a continuous spectrum from ~ 160 - 570 nm. Expected S/N per spectral resolution element are shown in Table 2 as well as the S/N after rebinning to a resolution of 2.5 nm (still high compared to the 90 nm broad O_3+OH band on Ganymede and the 40 nm FWHM SO_2 band). S/N were calculated using the STIS exposure time calculator and actual flux densities measured with HST. The assumed integration time is 100 seconds for the G230L observations, and 60 seconds for the G430L. In addition, we plan one long exposure of 1500 seconds with the G230L grating and the 52\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\x2 arcsec slit to obtain adequate S/N below 180 nm, though with limited spatial resolution. The G430L grating is required to obtain the long wavelength wing of the O_3+OH band and will also provide information on the distribution of elemental sulfur on Europa (Spencer et al. 1995). It is important to note that the orientation of the slit relative to the satellites will not be parallel to either longitude or latitude because of the orientation of STIS relative to nominal spacecraft roll for objects near the ecliptic. Therefore, a sequence of slit positions covering most or all of the satellite's disk is required to ensure adequate sampling of high latitude regions. \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\medskip noindent Ganymede noindent\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ulVisit 1: 5 orbits\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ We will observe Ganymede's trailing hemisphere at an orbital longitude of ~ 230degrees . In the first orbit, after guide star acquisition and target acquisition (12 minutes) we will obtain spectra with the STIS/NUV, G230L and the 52\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\x0.1 arcsec slit at four slit positions. Each integration will be 100 seconds long (possibly expanded slightly to fill available time in the 52 minute visibility period). In calculating the overheads we have explicitly include the moving target tracking overheads (approximately 2 minutes per slit position, *not* detailed in the instrument handbook), overheads of 2 minutes per small slew to reposition the slit, as well as the standard instrument overheads. The second and third orbits will complete the mapping with the TG230L grating with six slit positions in each orbit after a guide star reacquisition. Orbits one through three total sixteen slit positions covering a 1.6 arcsec wide area sufficient to contain essentially all of the disk of Ganymede. In orbits four and five we will switch to the G430L grating and the CCD detector. In each orbit we will obtain eight slit positions (because of the slightly shorter overheads for the CCD compared to the NUV detector) for a total of sixteen in two orbits. noindent\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ulVisit 2: 6 orbits\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ The second visit will be identical to the first except for two changes. In the second visit we will observe Ganymede's trailing hemisphere near an orbital longitude of 310 degrees, approximately 80 degrees from the first visit. This orientation will allow us to obtain better resolution of areas near the limb in visit 1, obtain coverage over a broader range of longitudes including the transition from trailing to leading hemispheres, and allows us to investigate possible optical depth effects in longitudes that have moved from center to limb between the two visits. The orbit sequence for the first five orbits will be identical to visit 1. In the sixth orbit we will add a long integration (at least 1500 seconds) with the G230L grating and the 52\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\x2 arcsec slit which will allow us to obtain adequate S/N at wavelengths below ~ 180 nm. This is an exploratory first measurement of the albedo spectrum of an icy satellite in this wavelength range where we may find spectral features of H_2O, H_2O_2, or other molecules. noindent\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ulVisit 3: 1 orbit\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ We have found from experience that one of the most powerful tools for analyzing spectra of satellites is the ability to make ratios of spectra of opposite hemispheres obtained with the same instrument. This technique minimizes problems of removing the solar spectrum with its numerous strong and narrow spectral features. Virtually all existing UV solar spectra have some serious shortcomings in flux calibration, wavelength calibration, and resolution which we can bypass with ratio spectra. Therefore, we will obtain, in one orbit, spectra in both the G230L and G430L with the same instrumental setup as for the trailing hemisphere maps. The exposure time for the G230L with the 52\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\x2 slit will be reduced to 600 seconds to allow this sequence to fit into a single orbit. \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\medskip noindent Europa noindent\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ulVisit 4: 3 orbits\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ We will observe Europa's trailing hemisphere near an orbital longitude of 270degrees . Because of Europa's smaller diameter we can cover the disk in three orbits rather than five. In orbits one and two we will measure the spectrum at ten slit positions with the G230L grating and the 52\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\x0.1 arcsec slit. In orbit three we will obtain eight slit positions with the CCD. This is slightly less than full coverage with the CCD, but should be adequate. noindent\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ulVisit 5: 1 orbit \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ We will observe Europa's leading hemisphere in a visit similar to visit 3 for Ganymede. The main purpose is to obtain comparison spectra of the leading hemisphere with the same instrumental setup. It will be possible to obtain two slit positions for the G230L and the G430L setups for minimal mapping of the leading hemisphere. Null .1in =1.5em =10000 vbox halign # & # & # & # & # multispan5 Table 2: Signal to Noise Estimates noalign 12pt height 1pt 1pt height 1pt 8pt satellite & grating & Lambda & S/N per & S/N per & & (nm) & dLambda & 2.5 nm noalign 8pt height 1pt 8pt noalign Ganymede & G230L & 160 & 4.6 ^\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\dagger & 18.4 & & 200 & 2.1 & 8 & & 250 & 5.1 & 20 & & 300 & 34 & 136 & G430L & 350 & 27 ^\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ddagger& 98 noalign noalign 8pt height 1pt multispan5100 sec integration in 52\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\x0.1 arcsec slit except as noted multispan5\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\dagger 1500 sec exposure with 52\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\x2 arcsec slit at 160 nm multispan5\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ddagger 60 sec exposure for G430 L multispan5S/N calculation results for Europa are similar Real Time Justification ----------------------- No special requirements are needed. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 7317( 7) - 08/23/00 15:58 - [ 3] Data Distribution Paper Products: YES Media: ELECTRONIC Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 7317( 7) - 08/23/00 15:58 - [ 4] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 | TARGET NAME: GANYMEDE290 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=JUPITER | STD=GANYMEDE | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF GANYMEDE FROM EARTH BETWEEN 270 | 310, RANGE GANYMEDE EARTH LT 4.6, SEP OF | JUPITER GANYMEDE FROM EARTH GT 10.0", | SEP OF IO GANYMEDE FROM EARTH GT 10", | SEP OF EUROPA GANYMEDE FROM EARTH GT | 10.0", SEP OF CALLISTO GANYMEDE FROM | EARTH GT 10.0" | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 5.58+/-0.2 | Ganymede trailing hemisphere. SURF(2300)=4+/-1e-14 | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 | TARGET NAME: GANYMEDE200 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=JUPITER | STD=GANYMEDE | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF GANYMEDE FROM EARTH BETWEEN 185 | 215, RANGE GANYMEDE EARTH LT 4.6, SEP OF | JUPITER GANYMEDE FROM EARTH GT 10.0", | SEP OF IO GANYMEDE FROM EARTH GT 10", | SEP OF EUROPA GANYMEDE FROM EARTH GT | 10.0", SEP OF CALLISTO GANYMEDE FROM | EARTH GT 10.0" | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 5.58+/-0.2 | Ganymede anti-Jupiter, trailing SURF(2300)=8+/-1e-14 | hemisphere. | ------------------------------------------------------------------------------------------------------------------------------------ 7317( 7) - 08/23/00 15:58 - [ 5] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 3 | TARGET NAME: GANYMEDE110 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=JUPITER | STD=GANYMEDE | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF GANYMEDE FROM EARTH BETWEEN 90 | 130, RANGE GANYMEDE EARTH LT 4.6, SEP OF | JUPITER GANYMEDE FROM EARTH GT 10.0", | SEP OF IO GANYMEDE FROM EARTH GT 10", | SEP OF EUROPA GANYMEDE FROM EARTH GT | 10.0", SEP OF CALLISTO GANYMEDE FROM | EARTH GT 10.0" | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 5.58+/-0.2 | Ganymede leading hemisphere. SURF(2300)=12+/-1e-14 | | ------------------------------------------------------------------------------------------------------------------------------------ 7317( 7) - 08/23/00 15:58 - [ 6] Visit: 01 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 GANYMEDE290 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=25, 1 0.1 S ONBOARD ACQ FOR 12-14 CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 12 GANYMEDE290 STIS/N ACCUM 52X0.2 G230L 2376 PATTERN=PERP-TO-SLIT,NUM-POS=9, 1 200 S POS TARG -0.85, 0 UV-MAM STEP-SIZE=0.2, A PATTERN-DIRECTION=PLUS, SIZEAXIS2=FULL ------------------------------------------------------------------------------------------------------------------------------------ 14 GANYMEDE290 STIS/C ACCUM 52X0.2 G430L 4300 PATTERN=PERP-TO-SLIT,NUM-POS=9, 1 90 S POS TARG -0.85, 0 MAX DUR CD STEP-SIZE=0.2, 120 S PATTERN-DIRECTION=PLUS, SIZEAXIS2=FULL,CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 7317( 7) - 08/23/00 15:58 - [ 7] Visit: 02 Visit Priority: Visit Requirements: between 21-oct-2000:13:45 and 21-oct-2000:19:30 between 11-nov-2000:23:00 and 12-nov-2000:11:30 On Hold Comments: Additional Comments: These betweens reflect BOP check safety, so do not movify without re-doing the BOP check. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 21 GANYMEDE200 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=25, 1 0.1 S ONBOARD ACQ FOR 22-24 CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 22 GANYMEDE200 STIS/N ACCUM 52X0.2 G230L 2376 PATTERN=PERP-TO-SLIT,NUM-POS=9, 1 200 S POS TARG -0.85, 0 UV-MAM STEP-SIZE=0.2, A PATTERN-DIRECTION=PLUS, SIZEAXIS2=FULL ------------------------------------------------------------------------------------------------------------------------------------ 24 GANYMEDE200 STIS/C ACCUM 52X0.2 G430L 4300 PATTERN=PERP-TO-SLIT,NUM-POS=9, 1 90 S POS TARG -0.85, 0 MAX DUR CD STEP-SIZE=0.2, 120 S PATTERN-DIRECTION=PLUS, SIZEAXIS2=100,GAIN=4 ------------------------------------------------------------------------------------------------------------------------------------ 7317( 7) - 08/23/00 15:58 - [ 8] Visit: 03 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 31 GANYMEDE110 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=25, 1 0.1 S ONBOARD ACQ FOR 32-34 CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 32 GANYMEDE110 STIS/N ACCUM 52X0.2 G230L 2376 PATTERN=PERP-TO-SLIT,NUM-POS=9, 1 200 S POS TARG -0.85, 0 UV-MAM STEP-SIZE=0.2, A PATTERN-DIRECTION=PLUS, SIZEAXIS2=FULL ------------------------------------------------------------------------------------------------------------------------------------ 34 GANYMEDE110 STIS/C ACCUM 52X0.2 G430L 4300 PATTERN=PERP-TO-SLIT,NUM-POS=9, 1 90 S POS TARG -0.85, 0 MAX DUR CD STEP-SIZE=0.2, 120 S PATTERN-DIRECTION=PLUS, SIZEAXIS2=FULL,CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 7317( 7) - 08/23/00 15:58 - [ 9] Summary Form for Proposal 7317 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F28X50LP 52X0.2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=DIFFUSE CHECKBOX=25 DIFFUSE-CENTER=GEOMETRIC-CENTER SIZEAXIS2=FULL CR-SPLIT=NO PATTERN-DIRECTION=PLUS GAIN=4 STEP-SIZE=0.2 NUM-POS=9 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 12-14 POS TARG -0.85, 0 POS TARG -0.85, 0 MAX DUR 120 S between 21-oct-2000 13 45 and 21-oct-2000 19 30 between 11-nov-2000 23 00 and 12-nov-2000 11 30 ONBOARD ACQ FOR 22-24 ONBOARD ACQ FOR 32-34 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G230L G430L ------------------------------------------------------------------------------------------------------------------------------------ Target Names GANYMEDE290 GANYMEDE200 GANYMEDE110 ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 2376 4300 ------------------------------------------------------------------------------------------------------------------------------------