8580( 4) - 10/02/00 16:58 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 8580 Version: 4 Check-in Date: 02-Oct-2000 16:57:00 1.Proposal Title: Pre-Cassini/Huygens Studies of Titan's Surface, Troposphere and Stratosphere ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 9 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Eliot Young Southwest Research Institute CoI: Dr. Seran Gibbard LLNL N CoI: Dr. Bruce Macintosh LLNL N CoI: Dr. Don Gavel LLNL N CoI: Dr. Christopher McKay NASA Ames Research Center N CoI: Dr. Pascal Rannou Service d'Aeronomie N CoI: Dr. Caitlin Griffith Northern Arizona University N CoI: Dr. Keith Noll Space Telescope Science Institute N CoI: Dr. Ralph Lorenz University of Arizona N CoI: Dr. Mark Lemmon University of Arizona N CoI: Dr. Carolyn Porco University of Arizona N CoI: Dr. Jean-Pierre Lebreton ESA/ESTEC N CoI: Dr. Kevin Baines Jet Propulsion Laboratory N CoI: Dr. Claire Max LLNL N ------------------------------------------------------------------------------------ 5. Abstract Titan, Saturn's largest satellite, has an opaque atmosphere in UV and visible wavelengths due to aerosols and methane gas. We propose a data-dense suite of observations to (a) map the three-dimensional distribution of methane and aerosols in Titan's troposphere and stratosphere (up to 100 km), with the possibility of detecting moving weather patterns, (b) provide a history of the distribution of haze in preparation for Cassini and Huygens observations, and (c) map Titan's surface albedo with unprecendented spatial resolution and signal/noise. This proposal represents the most sensitive look at Titan's troposphere to date. The results of this proposal (i.e., the distribution of haze and methane) are important parameters in the planning of Cassini ISS and VIMS observations. In addition, the detection of ephemeral clouds in the troposphere (suggested from IR spectra) would help determine the direction of tropospheric winds, a critical parameter in planning the Huygens probe trajectory. ------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 2] Observations Description ------------------------ STIS image cubes of Titan from 0.5 to 1 micron. 8 visits taken at 2-day intervals. Real Time Justification ----------------------- None Calibration Justification ------------------------- None Additional Comments ------------------- Similar to GO-8229 ------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 | TARGET NAME: TITAN-CML0 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Titan-STIS Image Cube ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=SATURN | STD=TITAN | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF TITAN FROM EARTH BETWEEN -10 10 | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 7.5+/-1.0 | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 | TARGET NAME: TITAN-CML45 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Titan-STIS Image Cube ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=SATURN | STD=TITAN | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF TITAN FROM EARTH BETWEEN 35 55 | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 7.5+/-1.0 | | ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 4] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 3 | TARGET NAME: TITAN-CML90 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Titan-STIS Image Cube ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=SATURN | STD=TITAN | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF TITAN FROM EARTH BETWEEN 80 100 | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 7.5+/-1.0 | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 4 | TARGET NAME: TITAN-CML135 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Titan-STIS Image Cube ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=SATURN | STD=TITAN | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF TITAN FROM EARTH BETWEEN 125 145 | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 7.5+/-1.0 | | ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 5] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 5 | TARGET NAME: TITAN-CML180 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Titan-STIS Image Cube ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=SATURN | STD=TITAN | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF TITAN FROM EARTH BETWEEN 170 190 | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 7.5+/-1.0 | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 6 | TARGET NAME: TITAN-CML225 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Titan-STIS Image Cube ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=SATURN | STD=TITAN | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF TITAN FROM EARTH BETWEEN 215 235 | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 7.5+/-1.0 | | ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 6] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 7 | TARGET NAME: TITAN-CML270 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Titan-STIS Image Cube ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=SATURN | STD=TITAN | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF TITAN FROM EARTH BETWEEN 260 280 | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 7.5+/-1.0 | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 8 | TARGET NAME: TITAN-CML315 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Titan-STIS Image Cube ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=SATURN | STD=TITAN | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | CML OF TITAN FROM EARTH BETWEEN 305 325 | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | SURF(V) = 7.5+/-1.0 | | ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 7] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type STIS-PERP-TO-SLIT Pattern_Purpose MOSAIC Number_Of_Points 19 Point_Spacing 0.05 Coordinate_Frame POS-TARG Pattern_Orient 0 Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 8] Visit: 01 Visit Priority: Visit Requirements: GROUP 01, 02, 03, 04, 05, 06, 07, 08 WITHIN 17 D BETWEEN 04-Nov-2000 AND 13 -Nov-2000 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 TITAN-CML0 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=19, 1 0.1 S CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 10 TITAN-CML0 STIS/C ACCUM 52X0.05 G750L 7751 CR-SPLIT=NO,SIZEAXIS2=256 1 75 S PATTERN 1 10 CD ------------------------------------------------------------------------------------------------------------------------------------ 20 CCDFLAT STIS/C ACCUM 52X0.05 G750L 7751 2 DEF CD ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 9] Visit: 02 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 TITAN-CML45 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=19, 1 0.1 S CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 10 TITAN-CML45 STIS/C ACCUM 52X0.05 G750L 7751 CR-SPLIT=NO,SIZEAXIS2=256 1 75 S PATTERN 1 10 CD ------------------------------------------------------------------------------------------------------------------------------------ 20 CCDFLAT STIS/C ACCUM 52X0.05 G750L 7751 2 DEF CD ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 10] 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 TITAN-CML90 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=19, 1 0.1 S CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 10 TITAN-CML90 STIS/C ACCUM 52X0.05 G750L 7751 CR-SPLIT=NO,SIZEAXIS2=256 1 75 S PATTERN 1 10 CD ------------------------------------------------------------------------------------------------------------------------------------ 20 CCDFLAT STIS/C ACCUM 52X0.05 G750L 7751 2 DEF CD ------------------------------------------------------------------------------------------------------------------------------------ 30 TITAN-CML90 WFPC2 IMAGE PC1 F850LP 1 20 S ------------------------------------------------------------------------------------------------------------------------------------ 40 TITAN-CML90 WFPC2 IMAGE PC1 F673N 1 40 S ------------------------------------------------------------------------------------------------------------------------------------ 50 TITAN-CML90 WFPC2 IMAGE PC1 F1042M 1 200 S ------------------------------------------------------------------------------------------------------------------------------------ 60 TITAN-CML90 WFPC2 IMAGE PC1 F547M CR-SPLIT=NO 1 7 S ------------------------------------------------------------------------------------------------------------------------------------ 70 TITAN-CML90 WFPC2 IMAGE PC1 F588N 1 40 S ------------------------------------------------------------------------------------------------------------------------------------ 80 TITAN-CML90 WFPC2 IMAGE PC1 F953N 1 100 S ------------------------------------------------------------------------------------------------------------------------------------ 90 TITAN-CML90 WFPC2 IMAGE FQCH4P1 FQCH4P15 8929 1 200 S 5 ------------------------------------------------------------------------------------------------------------------------------------ 100 TITAN-CML90 WFPC2 IMAGE WF4 F255W 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 11] Visit: 04 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 TITAN-CML13 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=19, 1 0.1 S 5 CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 10 TITAN-CML13 STIS/C ACCUM 52X0.05 G750L 7751 CR-SPLIT=NO,SIZEAXIS2=256 1 75 S PATTERN 1 10 5 CD ------------------------------------------------------------------------------------------------------------------------------------ 20 CCDFLAT STIS/C ACCUM 52X0.05 G750L 7751 2 DEF CD ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 12] Visit: 05 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 TITAN-CML18 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=19, 1 0.1 S 0 CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 10 TITAN-CML18 STIS/C ACCUM 52X0.05 G750L 7751 CR-SPLIT=NO,SIZEAXIS2=256 1 75 S PATTERN 1 10 0 CD ------------------------------------------------------------------------------------------------------------------------------------ 20 CCDFLAT STIS/C ACCUM 52X0.05 G750L 7751 2 DEF CD ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 13] Visit: 06 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 TITAN-CML22 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=19, 1 0.1 S 5 CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 10 TITAN-CML22 STIS/C ACCUM 52X0.05 G750L 7751 CR-SPLIT=NO,SIZEAXIS2=256 1 75 S PATTERN 1 10 5 CD ------------------------------------------------------------------------------------------------------------------------------------ 20 CCDFLAT STIS/C ACCUM 52X0.05 G750L 7751 2 DEF CD ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 14] Visit: 07 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 TITAN-CML27 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=19, 1 0.1 S 0 CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 10 TITAN-CML27 STIS/C ACCUM 52X0.05 G750L 7751 CR-SPLIT=NO,SIZEAXIS2=256 1 75 S PATTERN 1 10 0 CD ------------------------------------------------------------------------------------------------------------------------------------ 20 CCDFLAT STIS/C ACCUM 52X0.05 G750L 7751 2 DEF CD ------------------------------------------------------------------------------------------------------------------------------------ 30 TITAN-CML27 WFPC2 IMAGE PC1 F850LP CR-SPLIT=NO 1 20 S 0 ------------------------------------------------------------------------------------------------------------------------------------ 40 TITAN-CML27 WFPC2 IMAGE PC1 F673N 1 40 S 0 ------------------------------------------------------------------------------------------------------------------------------------ 50 TITAN-CML27 WFPC2 IMAGE PC1 F1042M 1 200 S 0 ------------------------------------------------------------------------------------------------------------------------------------ 60 TITAN-CML27 WFPC2 IMAGE PC1 F336W 1 160 S 0 ------------------------------------------------------------------------------------------------------------------------------------ 70 TITAN-CML27 WFPC2 IMAGE PC1 F439W 1 40 S 0 ------------------------------------------------------------------------------------------------------------------------------------ 80 TITAN-CML27 WFPC2 IMAGE PC1 F547M CR-SPLIT=NO 1 7 S 0 ------------------------------------------------------------------------------------------------------------------------------------ 90 TITAN-CML27 WFPC2 IMAGE PC1 F588N 1 40 S 0 ------------------------------------------------------------------------------------------------------------------------------------ 100 TITAN-CML27 WFPC2 IMAGE PC1 F953N 1 100 S 0 ------------------------------------------------------------------------------------------------------------------------------------ 110 TITAN-CML27 WFPC2 IMAGE FQCH4N1 FQCH4N15 6193 1 60 S 0 5 ------------------------------------------------------------------------------------------------------------------------------------ 120 TITAN-CML27 WFPC2 IMAGE FQCH4P1 FQCH4P15 8929 1 200 S 0 5 ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 15] Visit: 08 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 TITAN-CML31 STIS/C ACQ F28X50L MIRROR ACQTYPE=DIFFUSE,CHECKBOX=19, 1 0.1 S 5 CD P DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ 10 TITAN-CML31 STIS/C ACCUM 52X0.05 G750L 7751 CR-SPLIT=NO,SIZEAXIS2=256 1 75 S PATTERN 1 10 5 CD ------------------------------------------------------------------------------------------------------------------------------------ 20 CCDFLAT STIS/C ACCUM 52X0.05 G750L 7751 2 DEF CD ------------------------------------------------------------------------------------------------------------------------------------ 8580( 4) - 10/02/00 16:58 - [ 16] Summary Form for Proposal 8580 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F28X50LP 52X0.05 PC1 FQCH4P15 WF4 FQCH4N15 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACCUM IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=DIFFUSE CHECKBOX=19 DIFFUSE-CENTER=GEOMETRIC-CENTER SIZEAXIS2=256 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GROUP 01, 02, 03, 04, 05, 06, 07, 08 WITHIN 17 D BETWEEN 04-Nov-2000 AND 13-Nov-2000 PATTERN 1 10 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G750L F850LP F673N F1042M F547M F588N F953N FQCH4P15 F255W F336W F439W FQCH4N15 ------------------------------------------------------------------------------------------------------------------------------------ Target Names TITAN-CML0 CCDFLAT TITAN-CML45 TITAN-CML90 TITAN-CML135 TITAN-CML180 TITAN-CML225 TITAN-CML270 TITAN-CML315 ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 7751 8929 6193 ------------------------------------------------------------------------------------------------------------------------------------