13694( 5) - 20-Jan-2015 15:02:25 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13694 Version: 5 Check-in Time: 20-Jan-2015 15:02:25 STScI Edit Number: 2 Title UV spectra of the icy Saturnian satellites: Understanding exogenic processes and NH3 in the system ------------------------------------------------------------------------------------ Type Cycle GO 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Amanda R. Hendrix Planetary Science Institute Y CoI: Dr. Keith S. Noll NASA Goddard Space Flight Center N CoI: Dr. John R. Spencer Southwest Research Institute N ------------------------------------------------------------------------------------ Abstract Existing data from Cassini and HST inform us that the icy satellites of Saturn exhibit unidentified UV absorptions - an overall reddish slope in the ~200-400 nm range, with additional spectral features superimposed. We are unable to solve these mysteries surrounding the source(s) of these absorptions using Cassini datasets due to a gap in spectral coverage in the 190-350 nm range (broadband coverage is available to wavelengths as short as 260 nm). HST/STIS data are critical to understanding the spectra of these moons, and to resolving the sources and processes that cause the absorptions. We suspect that ammonia, with its distinctive and strong absorption near 200 nm, plays a role in the spectra of these moons, which has implications for geologic activity. These observations will provide the first-ever NUV observations of Mimas, improved coverage on Enceladus, and the first-ever STIS observations on Dione and Rhea. We base our observation strategy and estimated SNRs on existing high-quality STIS spectra of Tethys (from program 7316). ------------------------------------------------------------------------------------ Observations Description ------------------------ Based on the existing spectra of the icy Saturnian satellites, we propose to measure the leading and trailing hemispheres of Mimas, Dione and Rhea, along with measuring Enceladus (either leading or trailing hemisphere) to understand UV-visible spectral shapes on these bodies and put together the story of compositional variations from one body to the next. Mimas has never been observed by STIS or FOS for UV spectral information, so this is sincerely needed. Enceladus has been measured with STIS using the 52x0.5 slit; however we can improve the quality of this spectrum by using the 52x0.2 slit to reduce background noise and improve SNR. Existing STIS datasets of Tethys are of good quality so we do not request time for that satellite. Dione and Rhea have never been measured by STIS, and the increased spectral coverage will be extremely valuable, to help refine what species are present at these moons that appear to be significantly different in spectral character from Tethys and the other moons. This suite of observations will result in observations of Enceladus, Mimas, Dione and Rhea of the quality of the existing Tethys observations, so that we have a good set of composite spectra to analyze as a set and investigate system-wide processes. We plan to optimize the observations to get the best-possible SNR toward the shorter wavelengths (near 180 nm), to aim for overlap with UVIS. The existing 13694( 5) - 20-Jan-2015 15:02:25 - [ 2] good-quality Tethys G230L spectra (program 7316) used the 52x0.2 slit with an exposure time of 2400 sec, and resulted in an SNR at 200 nm of ~10, increasing to ~895 at 300 nm, binning up 16 spectral elements. For these data, we do not require the highest spectral resolution, so could bin even more spectral pixels to increase SNR further. Thus, we estimate that we can achieve SNR values of this scale for the other satellites, using exposure times of ~2400 sec, keeping in mind that Mimas and Enceladus are smaller than Tethys (we can use the 52x0.1 slit for these objects) and we also expect that the scattered light will be more of an issue for these targets. Dione and Rhea have lower albedos but are larger bodies (we will use the 52x0.2 for Dione and the 52x0.5 slit for Rhea). For each satellite, we will supplement the G230L data with a single 60 sec G430L exposure, providing high SNR at longer wavelengths. We have used the STIS ETC to check exposure times and SNRs and we have determined that these exposure times and slit widths accommodate the MAMA count rate restrictions for bright objects, and do not saturate the CCD at the longer wavelengths in the passband, where the satellites are brighter. ------------------------------------------------------------------------------------ 13694( 5) - 20-Jan-2015 15:02:25 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: MIMAS-LEADING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Mimas leading hemisphere ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=SATURN STD=MIMAS ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS SEP OF MIMAS-LEADING SATURN FROM EARTH GT 19.0", SEP OF MIMAS-LEADING RHEA FROM EARTH GT 10", SEP OF MIMAS-LEADING TITAN FROM EARTH GT 10", CML OF MIMAS-LEADING FROM EARTH BETWEEN 70 110 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 13.2 +/- .2 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 TARGET NAME: MIMAS-TRAILING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Mimas trailing hemisphere ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=SATURN STD=MIMAS ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS SEP OF MIMAS-TRAILING SATURN FROM EARTH GT 18.0", SEP OF MIMAS-TRAILING RHEA FROM EARTH GT 10", SEP OF MIMAS-TRAILING TITAN FROM EARTH GT 10", CML OF MIMAS-TRAILING FROM EARTH BETWEEN 250 290 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 13.2 +/- .2 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 13694( 5) - 20-Jan-2015 15:02:25 - [ 4] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 3 TARGET NAME: ENCELADUS ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Enceladus ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=SATURN STD=ENCELADUS ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS SEP OF ENCELADUS SATURN FROM EARTH GT 26.5", SEP OF ENCELADUS RHEA FROM EARTH GT 10", SEP OF ENCELADUS TITAN FROM EARTH GT 10" ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 12.1 +/- .2 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 4 TARGET NAME: DIONE-LEADING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Dione leading hemisphere ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=SATURN STD=DIONE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS SEP OF DIONE-LEADING SATURN FROM EARTH GT 45", SEP OF DIONE-LEADING RHEA FROM EARTH GT 10", SEP OF DIONE-LEADING TITAN FROM EARTH GT 10", CML OF DIONE-LEADING FROM EARTH BETWEEN 70 110 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 10.8 +/- .2 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 13694( 5) - 20-Jan-2015 15:02:25 - [ 5] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 5 TARGET NAME: DIONE-TRAILING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Dione trailing hemisphere ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=SATURN STD=DIONE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS SEP OF DIONE-TRAILING SATURN FROM EARTH GT 45", SEP OF DIONE-TRAILING RHEA FROM EARTH GT 10", SEP OF DIONE-TRAILING TITAN FROM EARTH GT 10", CML OF DIONE-TRAILING FROM EARTH BETWEEN 250 290 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 10.8 +/- .2 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 6 TARGET NAME: RHEA-LEADING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Rhea leading hemisphere ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=SATURN STD=RHEA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS SEP OF RHEA-LEADING SATURN FROM EARTH GT 45", SEP OF RHEA-LEADING TITAN FROM EARTH GT 10", CML OF RHEA-LEADING FROM EARTH BETWEEN 70 110 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 10 +/- .15 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 13694( 5) - 20-Jan-2015 15:02:25 - [ 6] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 7 TARGET NAME: RHEA-TRAILING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Rhea trailing hemisphere ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=SATURN STD=RHEA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS SEP OF RHEA-TRAILING SATURN FROM EARTH GT 45", SEP OF RHEA-TRAILING TITAN FROM EARTH GT 10", CML OF RHEA-TRAILING FROM EARTH BETWEEN 250 290 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 10. +/- .15 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 13694( 5) - 20-Jan-2015 15:02:25 - [ 7] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 MIMAS-LEADI STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=POINT 1 .5 S (0.5 NG S) ------------------------------------------------------------------------------------------------------------------------------------ 2 MIMAS-LEADI STIS/CCD ACQ/PEA 52X0.1 MIRROR 1 .5 S (0.5 NG K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MIMAS-LEADI STIS/CCD ACCUM 52X0.1 G430L 4300 CR-SPLIT=NO 1 60 S (60 NG S) ------------------------------------------------------------------------------------------------------------------------------------ 4 MIMAS-LEADI STIS/NUV ACCUM 52X0.1 G230L 2376 1 1760 S NG -MAMA (1760 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ MIMAS-LEADING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A MIMAS-LEADING 2 STIS/CCD ACQ/PEA 52X0.1 MIRROR none none none none 1 N/A K MIMAS-LEADING 3 STIS/CCD ACCUM 52X0.1 G430L 4300 none none none none 1 N/A MIMAS-LEADING 4 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 1 N/A -MAMA 13694( 5) - 20-Jan-2015 15:02:25 - [ 8] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 MIMAS-TRAIL STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=POINT 1 .5 S (0.5 ING S) ------------------------------------------------------------------------------------------------------------------------------------ 2 MIMAS-TRAIL STIS/CCD ACQ/PEA 52X0.1 MIRROR 1 .5 S (0.5 ING K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MIMAS-TRAIL STIS/CCD ACCUM 52X0.1 G430L 4300 CR-SPLIT=NO 1 60 S (60 ING S) ------------------------------------------------------------------------------------------------------------------------------------ 4 MIMAS-TRAIL STIS/NUV ACCUM 52X0.1 G230L 2376 1 1660 S ING -MAMA (1660 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ MIMAS-TRAILING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A MIMAS-TRAILING 2 STIS/CCD ACQ/PEA 52X0.1 MIRROR none none none none 1 N/A K MIMAS-TRAILING 3 STIS/CCD ACCUM 52X0.1 G430L 4300 none none none none 1 N/A MIMAS-TRAILING 4 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 1 N/A -MAMA 13694( 5) - 20-Jan-2015 15:02:25 - [ 9] Visit: 03 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ENCELADUS STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=POINT 1 .5 S (0.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ENCELADUS STIS/CCD ACQ/PEA 52X0.1 MIRROR 1 .5 S (0.5 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ENCELADUS STIS/CCD ACCUM 52X0.1 G430L 4300 CR-SPLIT=NO 1 60 S (60 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 ENCELADUS STIS/NUV ACCUM 52X0.1 G230L 2376 1 1760 S -MAMA (1760 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ ENCELADUS 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A ENCELADUS 2 STIS/CCD ACQ/PEA 52X0.1 MIRROR none none none none 1 N/A K ENCELADUS 3 STIS/CCD ACCUM 52X0.1 G430L 4300 none none none none 1 N/A ENCELADUS 4 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 1 N/A -MAMA 13694( 5) - 20-Jan-2015 15:02:25 - [ 10] Visit: 04 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 DIONE-LEADI STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=DIFFUSE, CHECKBOX=3.0, 1 .5 S (0.5 NG DIFFUSE-CENTER=GEOMETRIC-CENTE S) R ------------------------------------------------------------------------------------------------------------------------------------ 2 DIONE-LEADI STIS/CCD ACCUM 52X0.2 G430L 4300 CR-SPLIT=NO 1 60 S (60 NG S) ------------------------------------------------------------------------------------------------------------------------------------ 3 DIONE-LEADI STIS/NUV ACCUM 52X0.2 G230L 2376 1 2051 S NG -MAMA (2051 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ DIONE-LEADING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A DIONE-LEADING 2 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none none 1 N/A DIONE-LEADING 3 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA 13694( 5) - 20-Jan-2015 15:02:25 - [ 11] Visit: 05 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 DIONE-TRAIL STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=DIFFUSE, CHECKBOX=3.0, 1 .5 S (0.5 ING DIFFUSE-CENTER=GEOMETRIC-CENTE S) R ------------------------------------------------------------------------------------------------------------------------------------ 2 DIONE-TRAIL STIS/CCD ACCUM 52X0.2 G430L 4300 CR-SPLIT=NO 1 60 S (60 ING S) ------------------------------------------------------------------------------------------------------------------------------------ 3 DIONE-TRAIL STIS/NUV ACCUM 52X0.2 G230L 2376 1 2051 S ING -MAMA (2051 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ DIONE-TRAILING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A DIONE-TRAILING 2 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none none 1 N/A DIONE-TRAILING 3 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA 13694( 5) - 20-Jan-2015 15:02:25 - [ 12] Visit: 06 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 RHEA-LEADIN STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=DIFFUSE, CHECKBOX=5.0, 1 .5 S (0.5 G DIFFUSE-CENTER=GEOMETRIC-CENTE S) R ------------------------------------------------------------------------------------------------------------------------------------ 2 RHEA-LEADIN STIS/CCD ACCUM 52X0.5 G430L 4300 CR-SPLIT=NO 1 60 S (60 G S) ------------------------------------------------------------------------------------------------------------------------------------ 3 RHEA-LEADIN STIS/NUV ACCUM 52X0.5 G230L 2376 1 1963 S G -MAMA (1963 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ RHEA-LEADING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A RHEA-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 none none none none 1 N/A RHEA-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 none none none none 1 N/A -MAMA 13694( 5) - 20-Jan-2015 15:02:25 - [ 13] Visit: 07 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 RHEA-TRAILI STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=DIFFUSE, CHECKBOX=5.0, 1 .5 S (0.5 NG DIFFUSE-CENTER=GEOMETRIC-CENTE S) R ------------------------------------------------------------------------------------------------------------------------------------ 2 RHEA-TRAILI STIS/CCD ACCUM 52X0.5 G430L 4300 CR-SPLIT=NO 1 60 S (60 NG S) ------------------------------------------------------------------------------------------------------------------------------------ 3 RHEA-TRAILI STIS/NUV ACCUM 52X0.5 G230L 2376 1 1963 S NG -MAMA (1963 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ RHEA-TRAILING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A RHEA-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 none none none none 1 N/A RHEA-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 none none none none 1 N/A -MAMA 13694( 5) - 20-Jan-2015 15:02:25 - [ 14] Summary Form for Proposal 13694 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.1, 52X0.2, 52X0.5, F28X50LP ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/PEAK ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=DIFFUSE, ACQTYPE=POINT, CHECKBOX=3.0, CHECKBOX=5.0, CR-SPLIT=NO, DIFFUSE-CENTER=GEOMETRIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G230L, G430L, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names DIONE-LEADING, DIONE-TRAILING, ENCELADUS, MIMAS-LEADING, MIMAS-TRAILING, RHEA-LEADING, RHEA-TRAILING ------------------------------------------------------------------------------------------------------------------------------------