16211( 4) - 03-Jun-2021 17:57:49 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16211 Version: 4 Check-in Time: 03-Jun-2021 17:57:49 STScI Edit Number: 2 Title A systematic study of auroral processes at Ganymede ------------------------------------------------------------------------------------ Type Cycle GO 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Pippa Molyneux Southwest Research Institute Y CoI: Dr. Jonathan David Nichols University of Leicester N CoI: Dr. Lorenz Roth Royal Institute of Technology N CoI: Dr. Kurt David Retherford Southwest Research Institute N CoI: Dr. Joshua Kammer Southwest Research Institute N ------------------------------------------------------------------------------------ Abstract Ganymede is the primary target of the upcoming JUICE mission, but many open questions currently exist about the unique magnetosphere-within-a-magnetosphere interaction between Ganymede and Jupiter. The ~10 degree offset between Jupiter's rotation and magnetic axes leads to a time-varying interaction between the magnetospheres of the two bodies, with Ganymede encountering the densest Jovian plasma at System III longitudes around 110 and 290 degrees. Previous observations of Ganymede's ultraviolet auroral emissions indicated that the orbital trailing and leading hemispheres respond differently to the changing plasma environment; the leading hemisphere emissions were found to be significantly more variable than the trailing emissions on a range of timescales. However, the two hemispheres were observed in different regions of System III longitude, and it is unclear if the difference in variability was real, or related to changes in the rate of reconnection with System III, as suggested by a recent analysis of radio observations. Our proposed program addresses this question by observing both hemispheres over a wide range of System III longitudes, including both plasma sheet crossings and regions of high and low radio emission probability, thereby conclusively determining whether the apparent disparate behavior of the two hemispheres is real. Our proposed observations, using COS G130M, will also provide the ability to test previous analysis of the expected O/O2 ratio in Ganymede's atmosphere, and will place constraints on S ions local to Ganymede. An improved understanding of the near-Ganymede environment will provide useful information in advance of the JUICE mission. ------------------------------------------------------------------------------------ Observations Description ------------------------ The orbital leading and trailing hemispheres of Ganymede - visible at eastern and western elongation, respectively - will each be observed using the COS G130M grating with central wavelength setting 1291. We will use a total of 12 orbits (three 2-orbit visits per hemisphere) to observe the auroral emissions on both hemispheres while Ganymede's position relative to Jupiter's magnetic field changes, to study how the changing magnetic interaction affects the aurora on a range of timescales. We have selected times when Ganymede experiences different magnetic conditions by placing constraints on the CML of Jupiter as viewed by Ganymede in the target definitions. We have tried not to 16211( 4) - 03-Jun-2021 17:57:49 - [ 2] make the constraints too restrictive, but they may be expanded slightly more if necessary, as long as we sample a good range of different regions over the three visits per hemisphere. We have requested observations within +/- 8 weeks of Jupiter opposition to maximize Ganymede's angular size and therefore the signal-to-noise ratio in the observations, but if scheduling is a problem this constraint can also be relaxed (ideally only by a few more weeks). The emissions we intend to measure fall on both segments of the detector. We have therefore only used FP-POS 3 and 4 in our observation plans, so that our observations comply with the current COS2025 policy. We will use the same target acquisition strategy used in program 15868 for observations of Europa and Callisto (the first Callisto observations in that program have been acquired successfully). For ETC target acquisition runs, we used a surface brightness from JPL Horizons (5.5 Vmag/arcsec^2) and scaled it based on the difference between Ganymede's visible and NUV reflectance. Ganymede's visible albedo is ~43%, and its average albedo in the 240-320 nm range is ~ 8% (trailing hemisphere) to ~17% (leading hemisphere) [Nelson et al. 1987], so it is ~1 to 1.8 magnitudes dimmer in the NUV. ETC runs for science acquisitions used an input spectrum extracted from previous observations of Ganymede using COS G130M (from program 14634). The expected count rate is well below the COS FUV limit at all wavelengths, including Lyman alpha. If Hubble needs to operate in reduced-gyro mode during Cycle 28, we expect that the main impact on our program would be that the observations may be more spread out in time. This may degrade the signal-to-noise ratio in our observations (if we observe at times further from Jupiter opposition), and would add some uncertainty about whether our results may be influenced by long-term changes in the Jovian plasma conditions. However, we deliberately designed our visits to help us determine whether long-term variations may be occurring, by including some overlap in the magnetic longitudes targeted by the three visits per hemisphere. Since Juno is expected to continue operating at Jupiter for at least the next few years, we should also have some additional in situ infomation about the plasma conditions. We therefore don't expect the possible use of reduced-gyro mode to have a large effect on our science results. ------------------------------------------------------------------------------------ 16211( 4) - 03-Jun-2021 17:57:49 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: GANYMEDE-EAST-1 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF GANYMEDE-EAST-1 BY JUPITER FROM EARTH, SEP OF GANYMEDE-EAST-1 IO FROM EARTH GT 10", SEP OF GANYMEDE-EAST-1 EUROPA FROM EARTH GT 10", SEP OF GANYMEDE-EAST-1 CALLISTO FROM EARTH GT 10", OLG OF GANYMEDE-EAST-1 BETWEEN 75 105, CML OF JUPITER FROM GANYMEDE BETWEEN 110 260 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 4.6 +/- 0.5 Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 16211( 4) - 03-Jun-2021 17:57:49 - [ 4] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 TARGET NAME: GANYMEDE-WEST-1 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF GANYMEDE-WEST-1 BY JUPITER FROM EARTH, SEP OF GANYMEDE-WEST-1 IO FROM EARTH GT 10", SEP OF GANYMEDE-WEST-1 EUROPA FROM EARTH GT 10", SEP OF GANYMEDE-WEST-1 CALLISTO FROM EARTH GT 10", OLG OF GANYMEDE-WEST-1 BETWEEN 255 285, CML OF JUPITER FROM GANYMEDE BETWEEN 290 80 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 4.6 +/- 0.5 Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 16211( 4) - 03-Jun-2021 17:57:49 - [ 5] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 3 TARGET NAME: GANYMEDE-EAST-2 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF GANYMEDE-EAST-2 BY JUPITER FROM EARTH, SEP OF GANYMEDE-EAST-2 IO FROM EARTH GT 10", SEP OF GANYMEDE-EAST-2 EUROPA FROM EARTH GT 10", SEP OF GANYMEDE-EAST-2 CALLISTO FROM EARTH GT 10", OLG OF GANYMEDE-EAST-2 BETWEEN 75 105, CML OF JUPITER FROM GANYMEDE BETWEEN 305 95 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 4.6 +/- 0.5 Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 16211( 4) - 03-Jun-2021 17:57:49 - [ 6] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 4 TARGET NAME: GANYMEDE-WEST-2 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF GANYMEDE-WEST-2 BY JUPITER FROM EARTH, SEP OF GANYMEDE-WEST-2 IO FROM EARTH GT 10", SEP OF GANYMEDE-WEST-2 EUROPA FROM EARTH GT 10", SEP OF GANYMEDE-WEST-2 CALLISTO FROM EARTH GT 10", OLG OF GANYMEDE-WEST-2 BETWEEN 255 285, CML OF JUPITER FROM GANYMEDE BETWEEN 125 275 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 4.6 +/- 0.5 Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 16211( 4) - 03-Jun-2021 17:57:49 - [ 7] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 5 TARGET NAME: GANYMEDE-EAST-3 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF GANYMEDE-EAST-3 BY JUPITER FROM EARTH, SEP OF GANYMEDE-EAST-3 IO FROM EARTH GT 10", SEP OF GANYMEDE-EAST-3 EUROPA FROM EARTH GT 10", SEP OF GANYMEDE-EAST-3 CALLISTO FROM EARTH GT 10", OLG OF GANYMEDE-EAST-3 BETWEEN 75 105, CML OF JUPITER FROM GANYMEDE BETWEEN 25 175 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 4.6 +/- 0.5 Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 16211( 4) - 03-Jun-2021 17:57:49 - [ 8] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 6 TARGET NAME: GANYMEDE-WEST-3 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE SATELLITE GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=GANYMEDE ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF GANYMEDE-WEST-3 BY JUPITER FROM EARTH, SEP OF GANYMEDE-WEST-3 IO FROM EARTH GT 10", SEP OF GANYMEDE-WEST-3 EUROPA FROM EARTH GT 10", SEP OF GANYMEDE-WEST-3 CALLISTO FROM EARTH GT 10", OLG OF GANYMEDE-WEST-3 BETWEEN 255 285, CML OF JUPITER FROM GANYMEDE BETWEEN 205 355 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 4.6 +/- 0.5 Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 16211( 4) - 03-Jun-2021 17:57:49 - [ 9] Visit: 01 Visit Requirements: BETWEEN 24-JUN-2021:00:00:00 AND 14-OCT-2021:00:00:00 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 GANYMEDE-EA COS/NUV ACQ/SEA BOA MIRRORA SCAN-SIZE=2 1 3 S (3 S) ST-1 RCH Comments: ETC run uses target brightness of 6.5 Vmag/arcsec^2 (leading hemisphere brightness). SNR is >100. ------------------------------------------------------------------------------------------------------------------------------------ 2 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=850 1 950 S ST-1 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-1 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-1 G see below (1276 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-1 G see below (460 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 | ------------------------------------------------------------------------------------------------------------------------------------ GANYMEDE-EAST-1 1 COS/NUV ACQ/SEA BOA MIRRORA none none none none 1 N/A RCH GANYMEDE-EAST-1 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-EAST-1 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-EAST-1 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1276.0 S G GANYMEDE-EAST-1 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 460 S G 16211( 4) - 03-Jun-2021 17:57:49 - [ 10] Visit: 02 Visit Requirements: BETWEEN 24-JUN-2021:00:00:00 AND 14-OCT-2021:00:00:00 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 GANYMEDE-WE COS/NUV ACQ/SEA BOA MIRRORA SCAN-SIZE=2 1 3 S (3 S) ST-1 RCH Comments: ETC run uses target brightness of 7.3 Vmag/arcsec^2 (trailing hemisphere brightness). SNR is >70. ------------------------------------------------------------------------------------------------------------------------------------ 2 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-1 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-1 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-1 G see below (1276 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-1 G see below (1276 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 | ------------------------------------------------------------------------------------------------------------------------------------ GANYMEDE-WEST-1 1 COS/NUV ACQ/SEA BOA MIRRORA none none none none 1 N/A RCH GANYMEDE-WEST-1 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-WEST-1 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-WEST-1 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1276.0 S G GANYMEDE-WEST-1 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1276.0 S G 16211( 4) - 03-Jun-2021 17:57:49 - [ 11] Visit: 03 Visit Requirements: BETWEEN 24-JUN-2021:00:00:00 AND 14-OCT-2021:00:00:00 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 GANYMEDE-EA COS/NUV ACQ/SEA BOA MIRRORA SCAN-SIZE=2 1 3 S (3 S) ST-2 RCH Comments: ETC run uses target brightness of 6.5 Vmag/arcsec^2 (leading hemisphere brightness). SNR is >100. ------------------------------------------------------------------------------------------------------------------------------------ 2 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-2 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-2 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-2 G see below (1276 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-2 G see below (1276 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 | ------------------------------------------------------------------------------------------------------------------------------------ GANYMEDE-EAST-2 1 COS/NUV ACQ/SEA BOA MIRRORA none none none none 1 N/A RCH GANYMEDE-EAST-2 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-EAST-2 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-EAST-2 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1276.0 S G GANYMEDE-EAST-2 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1276.0 S G 16211( 4) - 03-Jun-2021 17:57:49 - [ 12] Visit: 04 Visit Requirements: BETWEEN 24-JUN-2021:00:00:00 AND 14-OCT-2021:00:00:00 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 GANYMEDE-WE COS/NUV ACQ/SEA BOA MIRRORA SCAN-SIZE=2 1 3 S (3 S) ST-2 RCH Comments: ETC run uses target brightness of 7.3 Vmag/arcsec^2 (trailing hemisphere brightness). SNR is >70. ------------------------------------------------------------------------------------------------------------------------------------ 2 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-2 G see below (978 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-2 G see below (978 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-2 G see below (1216 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-2 G see below (1216 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 | ------------------------------------------------------------------------------------------------------------------------------------ GANYMEDE-WEST-2 1 COS/NUV ACQ/SEA BOA MIRRORA none none none none 1 N/A RCH GANYMEDE-WEST-2 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 978 S G GANYMEDE-WEST-2 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 978 S G GANYMEDE-WEST-2 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1216 S G GANYMEDE-WEST-2 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1216 S G 16211( 4) - 03-Jun-2021 17:57:49 - [ 13] Visit: 05 Visit Requirements: BETWEEN 24-JUN-2021:00:00:00 AND 14-OCT-2021:00:00:00 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 GANYMEDE-EA COS/NUV ACQ/SEA BOA MIRRORA SCAN-SIZE=2 1 3 S (3 S) ST-3 RCH Comments: ETC run uses target brightness of 6.5 Vmag/arcsec^2 (leading hemisphere brightness). SNR is >100. ------------------------------------------------------------------------------------------------------------------------------------ 2 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-3 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-3 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-3 G see below (1276 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GANYMEDE-EA COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-3 G see below (1276 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 | ------------------------------------------------------------------------------------------------------------------------------------ GANYMEDE-EAST-3 1 COS/NUV ACQ/SEA BOA MIRRORA none none none none 1 N/A RCH GANYMEDE-EAST-3 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-EAST-3 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-EAST-3 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1276.0 S G GANYMEDE-EAST-3 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1276.0 S G 16211( 4) - 03-Jun-2021 17:57:49 - [ 14] Visit: 06 Visit Requirements: BETWEEN 24-JUN-2021:00:00:00 AND 14-OCT-2021:00:00:00 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 GANYMEDE-WE COS/NUV ACQ/SEA BOA MIRRORA SCAN-SIZE=2 1 3 S (3 S) ST-3 RCH Comments: ETC run uses target brightness of 7.3 Vmag/arcsec^2 (trailing hemisphere brightness). SNR is >70. ------------------------------------------------------------------------------------------------------------------------------------ 2 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-3 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=850, FP-POS=3 1 950 S ST-3 G see below (1038 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-3 G see below (1276 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GANYMEDE-WE COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FP-POS=4 1 1200 S ST-3 G see below (1276 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 | ------------------------------------------------------------------------------------------------------------------------------------ GANYMEDE-WEST-3 1 COS/NUV ACQ/SEA BOA MIRRORA none none none none 1 N/A RCH GANYMEDE-WEST-3 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-WEST-3 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1038.0 S G GANYMEDE-WEST-3 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1276.0 S G GANYMEDE-WEST-3 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1276.0 S G 16211( 4) - 03-Jun-2021 17:57:49 - [ 15] Summary Form for Proposal 16211 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures BOA, PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/SEARCH, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1100, BUFFER-TIME=850, FP-POS=3, FP-POS=4, SCAN-SIZE=2 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 24-JUN-2021:00:00:00 AND 14-OCT-2021:00:00:00 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names GANYMEDE-EAST-1, GANYMEDE-EAST-2, GANYMEDE-EAST-3, GANYMEDE-WEST-1, GANYMEDE-WEST-2, GANYMEDE-WEST-3 ------------------------------------------------------------------------------------------------------------------------------------