16704( 12) - 25-Jul-2022 14:08:02 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16704 Version: 12 Check-in Time: 25-Jul-2022 14:08:02 STScI Edit Number: 7 Title Are the surfaces of the large moons of Uranus modified by charged particle bombardment? ------------------------------------------------------------------------------------ Type Cycle GO 29 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Richard Cartwright SETI Institute Y CoI: Dr. Bryan Jason Holler Space Telescope Science Institute N CoI: Dr. Ted L. Roush NASA Ames Research Center N CoI: Dr. Will M. Grundy Lowell Observatory N CoI: Dr. Amanda R. Hendrix Planetary Science Institute N CoI: Tom Nordheim Jet Propulsion Laboratory N ------------------------------------------------------------------------------------ Abstract We propose to observe the large Uranian satellites Ariel, Umbriel, Titania, and Oberon, using the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST), to investigate whether their surface compositions are modified by charged particles trapped in Uranus' magnetosphere. The large Uranian moons are candidate ocean worlds, with surfaces that are rich in CO2 ice. The origin of CO2 ice on these moons is uncertain, but it could be formed by ongoing charged particle bombardment of native H2O ice and C-rich material on their surfaces. Alternatively, CO2 ice could be native to these moons and sourced from their interiors, hinting at recent geologic activity. To investigate whether charged particles modify these four moons' surface compositions, we will collect UV spectra and conduct a series of measurements: (1) compare the near-UV (300 nm) albedos of each moon's leading and trailing hemisphere to characterize longitudinal and radial trends in charged particle irradiation; (2) measure an absorption band that spans 257 to 360 nm, attributed to trapped OH formed by charged particle irradiation of H2O ice, on each moon's leading and trailing hemisphere to characterize longitudinal and radial trends in the distribution of this feature; (3) compare the distribution of the 280-nm trapped OH band to the distribution of CO2 ice; (4) compare these new STIS spectra that would be collected over the northern hemispheres of these moons (sub-observer lat. 55 N) to archived HST/FOS spectra that were collected over their southern hemispheres (sub-observer lat. 45 S) to characterize any latitudinal trends in charged particle irradiation that might be present. ------------------------------------------------------------------------------------ Observations Description ------------------------ This project requests 16 orbits (~9.8 hours of science time) to observe the leading and trailing hemispheres of the Uranian satellites Ariel, Umbriel, Titania, and Oberon with the STIS spectrograph on HST, using the G230L (NUV-MAMA) and G430L (CCD) gratings. Observations with both the G230L and G430L gratings are required to achieve sufficient wavelength coverage to complete our primary objectives of measuring the near-ultraviolet albedos of these four moons' leading and trailing hemispheres (centered at 300 nm) and measuring a 16704( 12) - 25-Jul-2022 14:08:02 - [ 2] previously detected trapped OH band that spans ~257 to 360 nm in archived HST/FOS spectra (program 6762). The 16 orbits should be utilized as follows (text copied from selected proposal): G230L observations of these four moons' leading hemispheres (4 orbits, 2220 s of exposure time per orbit); G230L observations of their trailing hemispheres (4 orbits, 2220 s of exposure time per orbit); G430L observations of their leading hemispheres (4 orbits, 2140 s of exposure time per orbit); G430L observations of their trailing hemispheres (4 orbits, 2140 s of exposure time per orbit). To ensure that we observe each hemisphere with the G230L and G430L close in time, we require observations of each moon's leading and trailing hemisphere to occur over two sequential orbits (i.e., one orbit for the G230L and the next sequential orbit for the G430L). Furthermore, we request that the exposure times be split into two dithered exposures: G230L orbits should be split into two dithered exposures each 1110 s in length; G430L orbits should be split into two dithered exposures eacg 1070 s in length. Justify Duplications (text copied from selected proposal): Ariel, Titania, and Oberon were observed using HST/FOS in 1996 (program ID 6762). This program only collected spectra of one hemisphere of these three moons. To investigate whether charged particle bombardment is modifying the surface compositions of the Uranian satellites, it is critical that we collect UV spectra of both their leading and trailing hemispheres, which was not done in Program 6762. Additionally, to determine whether charged particle bombardment operates differently at different latitudes, we require new UV spectra of these moons' currently observable northern hemispheres (55 degrees N) to compare to the UV spectra collected over their southern hemispheres (45 degrees S) in Program 6762. Thus, duplicate observations are needed to achieve our science goals. ------------------------------------------------------------------------------------ 16704( 12) - 25-Jul-2022 14:08:02 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: ARIEL-LEADING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE-ARIEL-LEADING-HEMISPHERE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=URANUS STD=ARIEL ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF ARIEL-LEADING BY URANUS FROM EARTH, RANGE ARIEL-LEADING EARTH LT 19.9, OLG OF ARIEL-LEADING FROM EARTH BETWEEN 60 120 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 14.4 Observation of Ariel's leading hemisphere. Ephemeris Center: EARTH Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 TARGET NAME: UMBRIEL-LEADING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE-UMBRIEL-LEADING-HEMISPHERE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=URANUS STD=UMBRIEL ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF UMBRIEL-LEADING BY URANUS FROM EARTH, RANGE UMBRIEL-LEADING EARTH LT 19.9, OLG OF UMBRIEL-LEADING FROM EARTH BETWEEN 60 120 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 15.1 Observation of Umbriel's leading hemisphere. Ephemeris Center: EARTH Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 16704( 12) - 25-Jul-2022 14:08:02 - [ 4] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 3 TARGET NAME: TITANIA-LEADING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE-TITANIA-LEADING-HEMISPHERE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=URANUS STD=TITANIA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF TITANIA-LEADING BY URANUS FROM EARTH, RANGE TITANIA-LEADING EARTH LT 19.9, OLG OF TITANIA-LEADING FROM EARTH BETWEEN 60 120 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 14.0 Observation of Titania's leading hemisphere. Ephemeris Center: EARTH Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 4 TARGET NAME: OBERON-LEADING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE-OBERON-LEADING-HEMISPHERE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=URANUS STD=OBERON ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF OBERON-LEADING BY URANUS FROM EARTH, RANGE OBERON-LEADING EARTH LT 19.9, OLG OF OBERON-LEADING FROM EARTH BETWEEN 60 120 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 14.2 Observation of Oberon's leading hemisphere. Ephemeris Center: EARTH Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 16704( 12) - 25-Jul-2022 14:08:02 - [ 5] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 5 TARGET NAME: ARIEL-TRAILING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE-ARIEL-LEADING-HEMISPHERE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=URANUS STD=ARIEL ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF ARIEL-TRAILING BY URANUS FROM EARTH, OLG OF ARIEL-TRAILING FROM EARTH BETWEEN 240 300, RANGE ARIEL-TRAILING EARTH LT 19.9 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 14.4 Observation of Ariel's trailing hemisphere. Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 6 TARGET NAME: UMBRIEL-TRAILING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE-UMBRIEL-TRAILING-HEMISPHERE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=URANUS STD=UMBRIEL ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF UMBRIEL-TRAILING BY URANUS FROM EARTH, RANGE UMBRIEL-LEADING EARTH LT 19.9, OLG OF UMBRIEL-TRAILING FROM EARTH BETWEEN 240 300 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 15.1 Observation of Umbriel's trailing hemisphere. Ephemeris Center: EARTH Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 16704( 12) - 25-Jul-2022 14:08:02 - [ 6] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 7 TARGET NAME: TITANIA-TRAILING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE-TITANIA-TRAILING-HEMISPHERE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=URANUS STD=TITANIA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF TITANIA-TRAILING BY URANUS FROM EARTH, RANGE TITANIA-LEADING EARTH LT 19.9, OLG OF TITANIA-TRAILING FROM EARTH BETWEEN 240 300 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 14.0 Observation of Titania's trailing hemisphere. Ephemeris Center: EARTH Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 8 TARGET NAME: OBERON-TRAILING ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE-OBERON-TRAILING-HEMISPHERE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=URANUS STD=OBERON ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF OBERON-TRAILING BY URANUS FROM EARTH, RANGE OBERON-LEADING EARTH LT 19.9, OLG OF OBERON-TRAILING FROM EARTH BETWEEN 240 300 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 14.2 Observation of Oberon's trailing hemisphere. Ephemeris Center: EARTH Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 16704( 12) - 25-Jul-2022 14:08:02 - [ 7] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type STIS-ALONG-SLIT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 2 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 90.0 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 16704( 12) - 25-Jul-2022 14:08:02 - [ 8] Visit: 01 (Ariel-Leading) Visit Requirements: ORIENT 71.5D TO 95 D; ORIENT 253.86D TO 285 D On Hold Comments: Additional Comments: An Orient Range for HST is required to assure maximum separation between the STIS slit and Uranus. The Orient Range will be added after this observation has been scheduled. 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 ARIEL-LEADI STIS/CCD ACQ F28X50LP MIRROR 1 0.8 S (0.8 NG S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ARIEL-LEADI STIS/CCD ACCUM 52X0.5 G430L 4300 1 503 S PATTERN 1 2 NG (1509 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ARIEL-LEADI STIS/NUV ACCUM 52X0.5 G230L 2376 1 628 S PATTERN 1 3 NG -MAMA (1884 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 | ------------------------------------------------------------------------------------------------------------------------------------ ARIEL-LEADING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A ARIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 1 1 N/A ARIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 2 1 N/A ARIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 1 1 N/A ARIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 2 1 N/A ARIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 1 1 N/A ARIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 2 1 N/A ARIEL-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 1 none none none 2 N/A -MAMA ARIEL-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 2 none none none 2 N/A -MAMA ARIEL-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 3 none none none 2 N/A -MAMA 16704( 12) - 25-Jul-2022 14:08:02 - [ 9] Visit: 02 (Ariel-Trailing) Visit Requirements: ORIENT 73D TO 74 D On Hold Comments: Additional Comments: An Orient Range for HST is required to assure maximum separation between the STIS slit and Uranus. The Orient Range will be added after this observation has been scheduled. 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 ARIEL-TRAIL STIS/CCD ACQ F28X50LP MIRROR 1 0.8 S (0.8 ING S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ARIEL-TRAIL STIS/CCD ACCUM 52X0.5 G430L 4300 1 503 S PATTERN 1 2 ING (1509 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ARIEL-TRAIL STIS/NUV ACCUM 52X0.5 G230L 2376 1 628 S PATTERN 1 3 ING -MAMA (1884 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 | ------------------------------------------------------------------------------------------------------------------------------------ ARIEL-TRAILING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A ARIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 1 1 N/A ARIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 2 1 N/A ARIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 1 1 N/A ARIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 2 1 N/A ARIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 1 1 N/A ARIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 2 1 N/A ARIEL-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 1 none none none 2 N/A -MAMA ARIEL-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 2 none none none 2 N/A -MAMA ARIEL-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 3 none none none 2 N/A -MAMA 16704( 12) - 25-Jul-2022 14:08:02 - [ 10] Visit: 03 (Umbriel-Leading) Visit Requirements: ORIENT 71.5D TO 95 D; ORIENT 253.86D TO 285 D On Hold Comments: Additional Comments: An Orient Range for HST is required to assure maximum separation between the STIS slit and Uranus. The Orient Range will be added after this observation has been scheduled. 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 UMBRIEL-LEA STIS/CCD ACQ F28X50LP MIRROR 1 1.5 S (1.5 DING S) ------------------------------------------------------------------------------------------------------------------------------------ 2 UMBRIEL-LEA STIS/CCD ACCUM 52X0.5 G430L 4300 1 502 S PATTERN 1 2 DING (1506 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 UMBRIEL-LEA STIS/NUV ACCUM 52X0.5 G230L 2376 1 628 S PATTERN 1 3 DING -MAMA (1884 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 | ------------------------------------------------------------------------------------------------------------------------------------ UMBRIEL-LEADING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A UMBRIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 1 1 N/A UMBRIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 2 1 N/A UMBRIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 1 1 N/A UMBRIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 2 1 N/A UMBRIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 1 1 N/A UMBRIEL-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 2 1 N/A UMBRIEL-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 1 none none none 2 N/A -MAMA UMBRIEL-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 2 none none none 2 N/A -MAMA UMBRIEL-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 3 none none none 2 N/A -MAMA 16704( 12) - 25-Jul-2022 14:08:02 - [ 11] Visit: 04 (Umbriel-Trailing) Visit Requirements: On Hold Comments: Additional Comments: An Orient Range for HST is required to assure maximum separation between the STIS slit and Uranus. The Orient Range will be added after this observation has been scheduled. 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 UMBRIEL-TRA STIS/CCD ACQ F28X50LP MIRROR 1 1.5 S (1.5 ILING S) ------------------------------------------------------------------------------------------------------------------------------------ 2 UMBRIEL-TRA STIS/CCD ACCUM 52X0.5 G430L 4300 1 502 S PATTERN 1 2 ILING (1506 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 UMBRIEL-TRA STIS/NUV ACCUM 52X0.5 G230L 2376 1 628 S PATTERN 1 3 ILING -MAMA (1884 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 | ------------------------------------------------------------------------------------------------------------------------------------ UMBRIEL-TRAILING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A UMBRIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 1 1 N/A UMBRIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 2 1 N/A UMBRIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 1 1 N/A UMBRIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 2 1 N/A UMBRIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 1 1 N/A UMBRIEL-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 2 1 N/A UMBRIEL-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 1 none none none 2 N/A -MAMA UMBRIEL-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 2 none none none 2 N/A -MAMA UMBRIEL-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 3 none none none 2 N/A -MAMA 16704( 12) - 25-Jul-2022 14:08:02 - [ 12] Visit: 05 (Titania-Leading) Visit Requirements: ORIENT 71D TO 72 D On Hold Comments: Additional Comments: We have added orient angles for these observations, which include an additional +45 deg offset for a STIS-specific requirement. 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 TITANIA-LEA STIS/CCD ACQ F28X50LP MIRROR 1 0.6 S (0.6 DING S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TITANIA-LEA STIS/CCD ACCUM 52X0.5 G430L 4300 1 504 S PATTERN 1 2 DING (1512 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TITANIA-LEA STIS/NUV ACCUM 52X0.5 G230L 2376 1 628 S PATTERN 1 3 DING -MAMA (1884 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 | ------------------------------------------------------------------------------------------------------------------------------------ TITANIA-LEADING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A TITANIA-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 1 1 N/A TITANIA-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 2 1 N/A TITANIA-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 1 1 N/A TITANIA-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 2 1 N/A TITANIA-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 1 1 N/A TITANIA-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 2 1 N/A TITANIA-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 1 none none none 2 N/A -MAMA TITANIA-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 2 none none none 2 N/A -MAMA TITANIA-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 3 none none none 2 N/A -MAMA 16704( 12) - 25-Jul-2022 14:08:02 - [ 13] Visit: 06 (Titania-Trailing) Visit Requirements: ORIENT 71D TO 72 D On Hold Comments: Additional Comments: An Orient Range for HST is required to assure maximum separation between the STIS slit and Uranus. The Orient Range will be added after this observation has been scheduled. 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 TITANIA-TRA STIS/CCD ACQ F28X50LP MIRROR 1 0.6 S (0.6 ILING S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TITANIA-TRA STIS/CCD ACCUM 52X0.5 G430L 4300 1 504 S PATTERN 1 2 ILING (1512 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 TITANIA-TRA STIS/NUV ACCUM 52X0.5 G230L 2376 1 628 S PATTERN 1 3 ILING -MAMA (1884 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 | ------------------------------------------------------------------------------------------------------------------------------------ TITANIA-TRAILING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A TITANIA-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 1 1 N/A TITANIA-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 2 1 N/A TITANIA-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 1 1 N/A TITANIA-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 2 1 N/A TITANIA-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 1 1 N/A TITANIA-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 2 1 N/A TITANIA-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 1 none none none 2 N/A -MAMA TITANIA-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 2 none none none 2 N/A -MAMA TITANIA-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 3 none none none 2 N/A -MAMA 16704( 12) - 25-Jul-2022 14:08:02 - [ 14] Visit: 07 (Oberon-Leading) Visit Requirements: ORIENT 71.5D TO 95 D; ORIENT 253.86D TO 285 D On Hold Comments: Additional Comments: An Orient Range for HST is required to assure maximum separation between the STIS slit and Uranus. The Orient Range will be added after this observation has been scheduled. 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 OBERON-LEAD STIS/CCD ACQ F28X50LP MIRROR 1 0.7 S (0.7 ING S) ------------------------------------------------------------------------------------------------------------------------------------ 2 OBERON-LEAD STIS/CCD ACCUM 52X0.5 G430L 4300 1 504 S PATTERN 1 2 ING (1512 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 OBERON-LEAD STIS/NUV ACCUM 52X0.5 G230L 2376 1 628 S PATTERN 1 3 ING -MAMA (1884 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 | ------------------------------------------------------------------------------------------------------------------------------------ OBERON-LEADING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A OBERON-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 1 1 N/A OBERON-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 2 1 N/A OBERON-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 1 1 N/A OBERON-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 2 1 N/A OBERON-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 1 1 N/A OBERON-LEADING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 2 1 N/A OBERON-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 1 none none none 2 N/A -MAMA OBERON-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 2 none none none 2 N/A -MAMA OBERON-LEADING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 3 none none none 2 N/A -MAMA 16704( 12) - 25-Jul-2022 14:08:02 - [ 15] Visit: 08 (Oberon-Trailing) Visit Requirements: ORIENT 71.5D TO 95 D; ORIENT 253.86D TO 285 D On Hold Comments: Additional Comments: An Orient Range for HST is required to assure maximum separation between the STIS slit and Uranus. The Orient Range will be added after this observation has been scheduled. 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 OBERON-TRAI STIS/CCD ACQ F28X50LP MIRROR 1 0.7 S (0.7 LING S) ------------------------------------------------------------------------------------------------------------------------------------ 2 OBERON-TRAI STIS/CCD ACCUM 52X0.5 G430L 4300 1 504 S PATTERN 1 2 LING (1512 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 OBERON-TRAI STIS/NUV ACCUM 52X0.5 G230L 2376 1 628 S PATTERN 1 3 LING -MAMA (1884 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 | ------------------------------------------------------------------------------------------------------------------------------------ OBERON-TRAILING 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A OBERON-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 1 1 N/A OBERON-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 1 none none 2 1 N/A OBERON-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 1 1 N/A OBERON-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 2 none none 2 1 N/A OBERON-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 1 1 N/A OBERON-TRAILING 2 STIS/CCD ACCUM 52X0.5 G430L 4300 3 none none 2 1 N/A OBERON-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 1 none none none 2 N/A -MAMA OBERON-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 2 none none none 2 N/A -MAMA OBERON-TRAILING 3 STIS/NUV ACCUM 52X0.5 G230L 2376 3 none none none 2 N/A -MAMA 16704( 12) - 25-Jul-2022 14:08:02 - [ 16] Summary Form for Proposal 16704 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.5, F28X50LP ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 253.86D TO 285 D, ORIENT 71.5D TO 95 D, ORIENT 71D TO 72 D, ORIENT 73D TO 74 D, PATTERN 1 2, PATTERN 1 3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G230L, G430L, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names ARIEL-LEADING, ARIEL-TRAILING, OBERON-LEADING, OBERON-TRAILING, TITANIA-LEADING, TITANIA-TRAILING, UMBRIEL-LEADING, UMBRIEL-TRAILING ------------------------------------------------------------------------------------------------------------------------------------