14267( 7) - 04-Apr-2016 18:18:48 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14267 Version: 7 Check-in Time: 04-Apr-2016 18:18:48 STScI Edit Number: 0 Title The Grand Finale : probing the origin of Saturn s aurorae with HST observations simultaneous to Cassini polar measurements ------------------------------------------------------------------------------------ Type Cycle GO 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Laurent Lamy Observatoire de Paris - Section de Meudon Y CoI: Dr. Sarah V. Badman Lancaster University Y CoI: Dr. Renee Prange Observatoire de Paris - Section de Meudon N CoI: Prof. John T. Clarke Boston University N CoI: Dr. Philippe Zarka Observatoire de Paris - Section de Meudon N CoI: Dr. Baptiste Cecconi Observatoire de Paris - Section de Meudon N CoI: Dr. Patricia Schippers Observatoire de Paris - Section de Meudon N CoI: Dr. William S. Kurth University of Iowa N CoI: Dr. Donald G. Mitchell The Johns Hopkins University Applied N Physics Laboratory CoI: Dr. Wayne R. Pryor Central Arizona College N CoI: Dr. Frank Crary University of Colorado at Boulder N CoI: Dr. Ulyana Dyudina California Institute of Technology N CoI: Dr. Emma J. Bunce University of Leicester N CoI: Prof. Michele Dougherty Imperial College of Science Technology and N Medicine CoI: Dr. Aikaterini Radioti Universite de Liege N CoI: Dr. Jonathan D. Nichols University of Leicester N ------------------------------------------------------------------------------------ Abstract With the increasing tilting of Saturn s north pole toward the Earth, HST has the opportunity to achieve unprecedented views of the entire northern aurorae at high spatial and temporal resolution. Such observations will shed light onto the auroral processes specific to the northern magnetosphere (the planet s magnetic dipole is offset toward the north) and compared to past similar observations of the southern aurorae. Furthermore, the Cassini spacecraft is about to start its last mission phase - the grand finale - with polar orbits around the planet, sampling the unexplored auroral regions at low altitude, before ultimately impacting the atmosphere. This proposal aims at taking advantage of this unique occasion to identify the acceleration processes responsible for Saturn's aurorae with HST remote observations combined with Cassini local measurements. HST images and spectra of the northern aurorae will primarily be scheduled when Cassini samples in situ the plasma conditions within the auroral regions, to assess fundamental plasma physics processes including acceleration, wave-particle interaction and energy/momentum transfer. Several HST orbits will also be coordinated with Cassini remote imaging of the southern aurorae to achieve a simultaneous view of both hemispheres and investigate magnetic (non-)conjugacy. ------------------------------------------------------------------------------------ Observations Description ------------------------ Observations of Saturn's northern UV aurorae while Cassini observes the 14267( 7) - 04-Apr-2016 18:18:48 - [ 2] southern aurorae. The time windows are critical and are listed in order of preference. Visits 01-03 and 04-06 are grouped within 11h to observe auroral dynamics over a fraction of a planetary rotation. Each visit consists of a single STIS orbit, made of a unique long exposure time-tagged FUV-MAMA image. The SrF2 filter is used to minimise geocoronal contamination. Time-tag mode is used with a buffer of 100s. Past observations show that the maximum global count rate remains <10000 cts/sec. Orient ranges are intended to avoid the repeller wire shadow and dark current across the northern polar region. ------------------------------------------------------------------------------------ 14267( 7) - 04-Apr-2016 18:18:48 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: SATURN ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: PLANET SATURN ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=SATURN ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 0.7 +/- 1 Moving target. Point at centre of planet so that the northern polar region and the front and rear parts of A, B, C rings fit in the MAMA aperture. Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 14267( 7) - 04-Apr-2016 18:18:48 - [ 4] Visit: 01 Visit Requirements: ORIENT 168D TO 288 D; ORIENT 348D TO 360 D; ORIENT 0.1D TO 108 D; BETWEEN 04-JUN-2016:20:40:00 AND 05-JUN-2016:08:50:00; BETWEEN 05-JUN-2016:19:10:00 AND 06-JUN-2016:04:10:00; BETWEEN 29-JUN-2016:02:44:00 AND 29-JUN-2016:12:04:00; BETWEEN 22-JUL-2016:15:40:00 AND 23-JUL-2016:05:35:00; GROUP 01, 02, 03 WITHIN 11H On Hold Comments: Additional Comments: Observations of Saturn's northern UV aurorae while Cassini observes the southern aurorae. Visits 01, 02 and 03 need to be grouped within the same observing window (within 11h of each other). Three windows matching the Cassini planning are listed by order of priority. Each visit consists of a single orbit, made of a unique long exposure time-tagged image. Please expand the exposure time of each observation as much as possible. Orient ranges are intended to avoid the repeller wire shadow and dark current across the northern polar region. 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 SATURN STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=100 1 2700 S -MAMA G (2700 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 | ------------------------------------------------------------------------------------------------------------------------------------ SATURN 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 N/A -MAMA G 14267( 7) - 04-Apr-2016 18:18:48 - [ 5] Visit: 02 Visit Requirements: ORIENT 168D TO 288 D; ORIENT 348D TO 360 D; ORIENT 0.1D TO 108 D; BETWEEN 04-JUN-2016:20:40:00 AND 05-JUN-2016:08:50:00; BETWEEN 05-JUN-2016:19:10:00 AND 06-JUN-2016:04:10:00; BETWEEN 29-JUN-2016:02:44:00 AND 29-JUN-2016:12:04:00; BETWEEN 22-JUL-2016:15:40:00 AND 23-JUL-2016:05:35:00; GROUP 02, 01, 03 WITHIN 11H On Hold Comments: Additional Comments: Observations of Saturn's northern UV aurorae while Cassini observes the southern aurorae. Visits 01, 02 and 03 need to be grouped within the same observing window (within 11h of each other). Three windows matching the Cassini planning are listed by order of priority. Each visit consists of a single orbit, made of a unique long exposure time-tagged image. Please expand the exposure time of each observation as much as possible. Orient ranges are intended to avoid the repeller wire shadow and dark current across the northern polar region. 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 SATURN STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=100 1 2700 S -MAMA G (2700 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 | ------------------------------------------------------------------------------------------------------------------------------------ SATURN 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 N/A -MAMA G 14267( 7) - 04-Apr-2016 18:18:48 - [ 6] Visit: 03 Visit Requirements: ORIENT 168D TO 288 D; ORIENT 348D TO 360 D; ORIENT 0.1D TO 108 D; BETWEEN 04-JUN-2016:20:40:00 AND 05-JUN-2016:08:50:00; BETWEEN 05-JUN-2016:19:10:00 AND 06-JUN-2016:04:10:00; BETWEEN 29-JUN-2016:02:44:00 AND 29-JUN-2016:12:04:00; BETWEEN 22-JUL-2016:15:40:00 AND 23-JUL-2016:05:35:00; GROUP 03, 01, 02 WITHIN 11H On Hold Comments: Additional Comments: Observations of Saturn's northern UV aurorae while Cassini observes the southern aurorae. Visits 01, 02 and 03 need to be grouped within the same observing window (within 11h of each other). Three windows matching the Cassini planning are listed by order of priority. Each visit consists of a single orbit, made of a unique long exposure time-tagged image. Please expand the exposure time of each observation as much as possible. Orient ranges are intended to avoid the repeller wire shadow and dark current across the northern polar region. 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 SATURN STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=100 1 2100 S -MAMA G (2100 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 | ------------------------------------------------------------------------------------------------------------------------------------ SATURN 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 N/A -MAMA G 14267( 7) - 04-Apr-2016 18:18:48 - [ 7] Visit: 04 Visit Requirements: ORIENT 168D TO 288 D; ORIENT 348D TO 360 D; ORIENT 0.1D TO 108 D; BETWEEN 19-AUG-2016:10:33:00 AND 20-AUG-2016:01:33:00; BETWEEN 29-JUN-2016:05:16:00 AND 29-JUN-2016:14:36:00; BETWEEN 22-JUL-2016:15:40:00 AND 23-JUL-2016:05:35:00; GROUP 04, 05, 06 WITHIN 11H On Hold Comments: Additional Comments: Observations of Saturn's northern UV aurorae while Cassini observes the southern aurorae. Visits 04, 05 and 06 need to be grouped within the same observing window (within 11h of each other). Three windows matching the Cassini planning are listed by order of priority. Each visit consists of a single orbit, made of a unique long exposure time-tagged image. Please expand the exposure time of each observation as much as possible. Orient ranges are intended to avoid the repeller wire shadow and dark current across the northern polar region. original between list: BETWEEN 19-AUG-2016:17:00:00 AND 20-AUG-2016:04:15:00; BETWEEN 19-AUG-2016:14:00:00 AND 19-AUG-2016:16:59:59; BETWEEN 29-JUN-2016:05:16:00 AND 29-JUN-2016:14:36:00; BETWEEN 22-JUL-2016:15:40:00 AND 23-JUL-2016:05:35:00 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 SATURN STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=100 1 2700 S -MAMA G (2700 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 | ------------------------------------------------------------------------------------------------------------------------------------ SATURN 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 N/A -MAMA G 14267( 7) - 04-Apr-2016 18:18:48 - [ 8] Visit: 05 Visit Requirements: ORIENT 168D TO 288 D; ORIENT 348D TO 360 D; ORIENT 0.1D TO 108 D; BETWEEN 19-AUG-2016:10:33:00 AND 20-AUG-2016:01:33:00; BETWEEN 29-JUN-2016:05:16:00 AND 29-JUN-2016:14:36:00; BETWEEN 22-JUL-2016:15:40:00 AND 23-JUL-2016:05:35:00; GROUP 05, 04, 06 WITHIN 11H On Hold Comments: Additional Comments: Observations of Saturn's northern UV aurorae while Cassini observes the southern aurorae. Visits 04, 05 and 06 need to be grouped within the same observing window (within 11h of each other). Three windows matching the Cassini planning are listed by order of priority. Each visit consists of a single orbit, made of a unique long exposure time-tagged image. Please expand the exposure time of each observation as much as possible. Orient ranges are intended to avoid the repeller wire shadow and dark current across the northern polar region. 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 SATURN STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=100 1 2700 S -MAMA G (2700 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 | ------------------------------------------------------------------------------------------------------------------------------------ SATURN 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 N/A -MAMA G 14267( 7) - 04-Apr-2016 18:18:48 - [ 9] Visit: 06 Visit Requirements: ORIENT 168D TO 288 D; ORIENT 348D TO 360 D; ORIENT 0.1D TO 108 D; BETWEEN 19-AUG-2016:10:33:00 AND 20-AUG-2016:01:33:00; BETWEEN 29-JUN-2016:05:16:00 AND 29-JUN-2016:14:36:00; BETWEEN 22-JUL-2016:15:40:00 AND 23-JUL-2016:05:35:00; GROUP 06, 04, 05 WITHIN 11H On Hold Comments: Additional Comments: Observations of Saturn's northern UV aurorae while Cassini observes the southern aurorae. Visits 04, 05 and 06 need to be grouped within the same observing window (within 11h of each other). Three windows matching the Cassini planning are listed by order of priority. Each visit consists of a single orbit, made of a unique long exposure time-tagged image. Please expand the exposure time of each observation as much as possible. Orient ranges are intended to avoid the repeller wire shadow and dark current across the northern polar region. 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 SATURN STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=100 1 2700 S -MAMA G (2700 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 | ------------------------------------------------------------------------------------------------------------------------------------ SATURN 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 N/A -MAMA G 14267( 7) - 04-Apr-2016 18:18:48 - [ 10] Summary Form for Proposal 14267 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F25SRF2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=100 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 04-JUN-2016:20:40:00 AND 05-JUN-2016:08:50:00, BETWEEN 05-JUN-2016:19:10:00 AND 06-JUN-2016:04:10:00, BETWEEN 19-AUG-2016:10:33:00 AND 20-AUG-2016:01:33:00, BETWEEN 22-JUL-2016:15:40:00 AND 23-JUL-2016:05:35:00, BETWEEN 29-JUN-2016:02:44:00 AND 29-JUN-2016:12:04:00, BETWEEN 29-JUN-2016:05:16:00 AND 29-JUN-2016:14:36:00, GROUP 01, 02, 03 WITHIN 11H, GROUP 02, 01, 03 WITHIN 11H, GROUP 03, 01, 02 WITHIN 11H, GROUP 04, 05, 06 WITHIN 11H, GROUP 05, 04, 06 WITHIN 11H, GROUP 06, 04, 05 WITHIN 11H, ORIENT 0.1D TO 108 D, ORIENT 168D TO 288 D, ORIENT 348D TO 360 D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names SATURN ------------------------------------------------------------------------------------------------------------------------------------