The Cassini spacecraft has made many exciting discoveries during its exploration of Saturn, but some observations of dynamic processes coupling the magnetosphere and ionosphere still require explanation. Our proposed observations exploit the presence of Cassini at Saturn to provide dual views of the aurorae, which show a snapshot of the global magnetospheric dynamics. A key target is the simultaneous observation of the northern aurorae by HST and the southern aurorae by Cassini. Such conjugate viewing is very rare and will provide fundamental insight on magnetospheric and auroral processes. We propose three complementary observing strategies targeted at elucidating: (i) North-south asymmetries: modes of solar wind-magnetosphere-ionosphere coupling, (ii) Relationship of equatorial and auroral enhancements: acceleration mechanisms, and (iii) 3-D structure of the aurora: electron energy and origin. The expected results will impact the broader astronomical community by revealing the electromagnetic interaction of planets with their local and stellar plasma environments, and the origin of periodic emission signals. Only HST is capable of studying Saturn's UV aurora at the temporal and spatial resolution required to achieve the science goals in partnership with already-scheduled Cassini observations. In spring 2014 HST will have the best view of Saturn's northern polar region to date. This is probably the last opportunity for simultaneous HST-Cassini observations because Cassini's orbit will again move to lower inclination from which the aurora cannot be viewed well. This proposal responds to the Cycle 21 UV Initiative. Observations of Saturn's northern UV aurorae around Saturn opposition in 2014, while the Cassini spacecraft is making complementary measurements. STIS/FUV-MAMA will be used in imaging mode to observe the 2-dimensional auroral morphology at over the wavelength range 115-170 nm. The observations are to be made with the SrF2 filter outside the low sky portion of the orbits to reject geo-coronal contaminated Lyman-alpha. SOLAR SYSTEM Default false false false false false SUPPORTED SOLAR SYSTEM Moving target. Point at the planet center so that the northern limb and the front and rear parts of the A, B, C rings fit in the MAMA aperture. PLANET PLANET SATURN STD=SATURN EARTH STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No 25MAMA STIS/FUV-MAMA Imaging No No F25SRF2 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Observations of Saturn's northern UV aurorae coincident with a Cassini flyby of Titan at the magnetopause, which may affect the aurora. The observations should be as close as possible to 2014-033T20:35:39 (2 Feb). ORIENT ranges are to avoid the repeller wire shadow falling on the northern polar region. (Tic-Visit :proposal-id 13396 :visit-id "K1" :proposal-version -1 :trans-version "20130502" :date "27-Jun-2013 14:14:56.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1113248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13396 :visit-id "K1" :obset-id "K1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13396 :visit-id "K1" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2806 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Observations of Saturn's northern UV aurorae coincident with a Cassini flyby of Titan at the magnetopause, which may affect the aurora. The observations should be as close as possible to 2014-097T14:56:15 (7 Apr). ORIENT ranges are to avoid the repeller wire shadow falling on the northern polar region. (Tic-Visit :proposal-id 13396 :visit-id "K2" :proposal-version -1 :trans-version "20130502" :date "27-Jun-2013 14:14:57.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1113248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13396 :visit-id "K2" :obset-id "K2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13396 :visit-id "K2" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2806 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Observations of Saturn's northern UV aurorae coincident with Cassini observations of the southern aurorae. Imaging on three consecutive orbits to observe time development of features. Each orbit contains 4 exposures: SrF2-Clear-Clear-SrF2. SrF2 exposures are TIME_TAG, Clear are ACCUM. Opportunity to optimise timings with STScI when SAA-free orbits are known. ORIENT ranges are to avoid the repeller wire shadow falling on the northern polar region. (Tic-Visit :proposal-id 13396 :visit-id "K3" :proposal-version -1 :trans-version "20130502" :date "27-Jun-2013 14:15:00.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 3896416 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13396 :visit-id "K3" :obset-id "K3" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13396 :visit-id "K3" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2806 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13396 :visit-id "K3" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2948 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13396 :visit-id "K3" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2948 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Observations of Saturn's northern UV aurorae coincident with Cassini observations of the northern aurorae and ENA. Imaging on three consecutive orbits to observe time development of features. Each orbit contains 4 exposures: SrF2-Clear-Clear-SrF2. SrF2 exposures are TIME_TAG, Clear are ACCUM. Opportunity to optimise timings with STScI when SAA-free orbits are known. ORIENT ranges are to avoid the repeller wire shadow falling on the northern polar region. (Tic-Visit :proposal-id 13396 :visit-id "K4" :proposal-version -1 :trans-version "20130502" :date "27-Jun-2013 14:15:03.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 3896416 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13396 :visit-id "K4" :obset-id "K4" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13396 :visit-id "K4" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2806 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13396 :visit-id "K4" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2948 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13396 :visit-id "K4" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2948 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Observations of Saturn's northern UV aurorae coincident with Cassini observations of the northern aurorae and ENA. Imaging on three consecutive orbits to observe time development of features. Each orbit contains 4 exposures: SrF2-Clear-Clear-SrF2. SrF2 exposures are TIME_TAG, Clear are ACCUM. Opportunity to optimise timings with STScI when SAA-free orbits are known. ORIENT ranges are to avoid the repeller wire shadow falling on the northern polar region. (Tic-Visit :proposal-id 13396 :visit-id "K5" :proposal-version -1 :trans-version "20130502" :date "27-Jun-2013 14:15:08.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 3896416 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13396 :visit-id "K5" :obset-id "K5" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13396 :visit-id "K5" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2806 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13396 :visit-id "K5" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2948 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13396 :visit-id "K5" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2948 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) false 3 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Observations of Saturn's northern UV aurorae coincident with Cassini observations of the northern aurorae and ENA. Imaging on one orbit, containing 4 exposures: SrF2-Clear-Clear-SrF2. SrF2 exposures are TIME_TAG, Clear are ACCUM. Opportunity to optimise timings with STScI when SAA-free orbits are known. ORIENT ranges are to avoid the repeller wire shadow falling on the northern polar region. (Tic-Visit :proposal-id 13396 :visit-id "K6" :proposal-version -1 :trans-version "20130502" :date "27-Jun-2013 14:15:09.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1113248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13396 :visit-id "K6" :obset-id "K6" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13396 :visit-id "K6" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2806 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Observations of Saturn's northern UV aurorae coincident with Cassini observations of the southern aurorae. Imaging on three consecutive orbits to observe time development of features. Each orbit contains 4 exposures: SrF2-Clear-Clear-SrF2. SrF2 exposures are TIME_TAG, Clear are ACCUM. Opportunity to optimise timings with STScI when SAA-free orbits are known. ORIENT ranges are to avoid the repeller wire shadow falling on the northern polar region. 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