15456( 6) - 03-Jul-2018 15:13:12 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15456 Version: 6 Check-in Time: 03-Jul-2018 15:13:12 STScI Edit Number: 1 Title Mars at opposition 2018 ------------------------------------------------------------------------------------ Type Cycle GO/DD 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Max Mutchler Space Telescope Science Institute Y CoI: Dr. Joel David Green Space Telescope Science Institute N CoI: Mr. Zolt Levay Space Telescope Science Institute N CoI: Joseph DePasquale Space Telescope Science Institute Y CoI: Christine Pulliam Space Telescope Science Institute N CoI: Ray Villard Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract We propose to image Mars with WFC3 near opposition, which occurs on 27 July 2018. This program essentially repeats the same observations conducted for the Mars 2016 opposition (HST program 14499), and is also intended to produce images for public release and archival research. ------------------------------------------------------------------------------------ Observations Description ------------------------ We propose to observe Mars near opposition, which occurs on 27 July 2018, to obtain WFC3/UVIS multi-color imaging. Mars will be near the Earth evenly illuminated by the Sun, which is ideal for our observations. It will also be easily visible to the public in the nighttime sky. Within our one HST orbit, we will sweep through a set of four WFC3 filters (F275W, F410M, F502N, F673N) several times each, and include a small dither shift, to mitigate cosmic rays and detector artifacts. Mars will easily fit within the 1K subarray, which will minimize CTE effects and allow us to obtain over 20 exposures per orbit. We hedge a bit with exposure times for each filter, since it is difficult to know in advance which Mars features might be prominent at the time of the observation (e.g. polar caps, clouds, a nearly global dust storm is underway in June 2018, and may persist through our observations in July). Exposure times will generally be short, but some may saturate in spots. We will not use post-flash which might increase the chance of saturation, and we feel the bright halo of Mars (overlapping PSF wings off the disk) will adequately fill charge traps during CCD readout. We seek approval to specify BLADE=A for all exposures to mitigate shutter-driven vibrations. We have included a wide UV filter (F275W) which also does not require very long exposures times and could reveal interesting Martian cloud structure. We would like to schedule this observation a week or so before the opposition date, so the public release can coincide with the opposition. ------------------------------------------------------------------------------------ 15456( 6) - 03-Jul-2018 15:13:12 - [ 2] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: MARS-OPPOSITION-2018 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: PLANET Mars just before opposition 2018 ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=MARS ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = -1 +/- 2 Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 15456( 6) - 03-Jul-2018 15:13:12 - [ 3] Visit: 01 Visit Requirements: BETWEEN 16-JUL-2018:00:00:00 AND 23-JUL-2018:00:00:00 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 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F275W BLADE=A 1 6 S (6 S) POS TARG -0.2, -0.2; SEQ TION-2018 S 1C-SUB 1-23 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F275W BLADE=A 1 12 S (12 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F410M BLADE=A 1 0.5 S (0.5 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F502N BLADE=A 1 1.0 S (1 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 5 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F673N BLADE=A 1 0.5 S (0.5 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 6 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F410M BLADE=A 1 0.8 S (0.8 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 7 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F502N BLADE=A 1 1.5 S (1.5 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 8 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F673N BLADE=A 1 0.5 S (0.5 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 9 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F410M BLADE=A 1 1.0 S (1 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 10 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F502N BLADE=A 1 2.0 S (2 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 11 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F673N BLADE=A 1 0.5 S (0.5 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 12 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F275W BLADE=A 1 12 S (12 POS TARG -0.2, -0.2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 13 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F410M BLADE=A 1 1.0 S (1 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 14 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F502N BLADE=A 1 2.0 S (2 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 15456( 6) - 03-Jul-2018 15:13:12 - [ 4] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 15 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F673N BLADE=A 1 0.5 S (0.5 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 16 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F410M BLADE=A 1 0.8 S (0.8 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 17 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F502N BLADE=A 1 1.5 S (1.5 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 18 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F673N BLADE=A 1 0.5 S (0.5 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 19 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F410M BLADE=A 1 0.5 S (0.5 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 20 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F502N BLADE=A 1 1.0 S (1 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 21 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F673N BLADE=A 1 0.5 S (0.5 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 22 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F275W BLADE=A 1 12 S (12 TION-2018 S 1C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 23 MARS-OPPOSI WFC3/UVI ACCUM UVIS2-C1K F275W BLADE=A 1 6 S (6 S) TION-2018 S 1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ MARS-OPPOSITION-201 1 WFC3/UVI ACCUM UVIS2-C1 F275W none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 2 WFC3/UVI ACCUM UVIS2-C1 F275W none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 3 WFC3/UVI ACCUM UVIS2-C1 F410M none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 4 WFC3/UVI ACCUM UVIS2-C1 F502N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 5 WFC3/UVI ACCUM UVIS2-C1 F673N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 6 WFC3/UVI ACCUM UVIS2-C1 F410M none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 7 WFC3/UVI ACCUM UVIS2-C1 F502N none none none none 1 N/A 8 S K1C-SUB 15456( 6) - 03-Jul-2018 15:13:12 - [ 5] 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 | ------------------------------------------------------------------------------------------------------------------------------------ MARS-OPPOSITION-201 8 WFC3/UVI ACCUM UVIS2-C1 F673N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 9 WFC3/UVI ACCUM UVIS2-C1 F410M none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 10 WFC3/UVI ACCUM UVIS2-C1 F502N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 11 WFC3/UVI ACCUM UVIS2-C1 F673N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 12 WFC3/UVI ACCUM UVIS2-C1 F275W none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 13 WFC3/UVI ACCUM UVIS2-C1 F410M none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 14 WFC3/UVI ACCUM UVIS2-C1 F502N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 15 WFC3/UVI ACCUM UVIS2-C1 F673N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 16 WFC3/UVI ACCUM UVIS2-C1 F410M none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 17 WFC3/UVI ACCUM UVIS2-C1 F502N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 18 WFC3/UVI ACCUM UVIS2-C1 F673N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 19 WFC3/UVI ACCUM UVIS2-C1 F410M none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 20 WFC3/UVI ACCUM UVIS2-C1 F502N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 21 WFC3/UVI ACCUM UVIS2-C1 F673N none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 22 WFC3/UVI ACCUM UVIS2-C1 F275W none none none none 1 N/A 8 S K1C-SUB MARS-OPPOSITION-201 23 WFC3/UVI ACCUM UVIS2-C1 F275W none none none none 1 N/A 8 S K1C-SUB 15456( 6) - 03-Jul-2018 15:13:12 - [ 6] Summary Form for Proposal 15456 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-C1K1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BLADE=A ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 16-JUL-2018:00:00:00 AND 23-JUL-2018:00:00:00, POS TARG -0.2, -0.2, SEQ 1-23 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F275W, F410M, F502N, F673N ------------------------------------------------------------------------------------------------------------------------------------ Target Names MARS-OPPOSITION-2018 ------------------------------------------------------------------------------------------------------------------------------------