0 Assigned ID: 5668 ----- Attempting Submission 1 (Tue Mar 26 21:19:23 GMT 2024) ----- A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. Updated 6 April with longer integration times and different offset for the observation window. -1303822765 ----- Attempting Submission 1 (Fri Aug 16 15:27:41 GMT 2024) ----- Your proposal could not be saved. Submission aborted. ----- Attempting Submission 2 (Fri Sep 13 13:22:14 GMT 2024) ----- ----- Attempting Submission 3 (Sun Apr 06 21:51:25 GMT 2025) ----- WAVE is not available for the G140L 52x0.5 set-up so the specified default of 52x0.05 was set. WAVE is within 40 min of spectral exposure. Target acquisition is not needed as planet can be located in FOV ETC run is not provided as the source is variable. Many previous observations have been made with these set-up that remain well below the safe limits. Saturn's auroral energetics at equinox: support for JWST observations Saturn's aurorae are displays of light in the planet's upper atmosphere, caused by the impact of charged particles funneled along the planet's magnetic field. These powerful displays reveal where energy flows through Saturn's space environment and are a major source of atmospheric heating. In late 2024, JWST will observe Saturn's northern atmosphere in the infrared to identify a hot spot postulated to drive Saturn's curious rotating aurora. The characteristics of these rotating aurorae and their control by the atmosphere are currently unique among all planets studied. The JWST observations are therefore extremely important in providing the only way to confirm that temperature controls the generation of the rotating aurora. To fully interpret the JWST observations, we will estimate the auroral electron precipitation energy and flux using spatially-resolved UV spectra from HST/STIS across the auroral oval to determine how much energy is deposited and whether it suppports an atmospheric hot spot. We will also identify rotational phases for Saturn's northern and southern auroral ovals to constrain where and when energy is input throughout a planetary rotation. HST provides the only way to obtain the necessary spatially-resolved UV spectra and to precisely track the rotational phase of the aurora. The understanding we gain from studying our solar system planets is valuable for interpreting other systems and interactions with stellar environments, such as how remotely-detected periodic emissions can identify characteristics of exoplanet magnetospheres. Images and spectra of Saturn's UV aurorae to be taken in support of JWST observations (JWST proposal GO5308). The observations will be as close in time as possible to the JWST observations (end Nov - start Dec) and separated into two sets of three consecutive orbits, with one set ideally simultaneous with JWST. Observations of the northern aurora on five orbits will follow the sequence image-spectra-image using STIS/FUV_MAMA in time-tag mode. Images will use SrF2 filter to reduce geocoronal contamination. Spectra will use the 52x0.5" slit and G140L grating to obtain FUV spectra over 1150-1700 A at ~12 A resolution. The field of view should be centered on the northern polar region to allow the slit to cross the northern auroral region. The sixth orbit will take STIS/FUV-MAMA/SrF2 time-tag imaging of the full planet disk, including northern and southern auroral regions. Preferably the auto wavecal will be performed in occultation. Dr Badman and Prof Clarke have expertise in planning and analysing HST observations of planetary aurorae as PI or CoI of numerous campaigns (Badman: 15, Clarke: 136), many of which have used STIS. Dr Kinrade is a Reseach Fellow with expertise in analysing Saturn auroral observations including rotational phenomena. Dr Moore, Dr Melin, and Prof Stallard are PIs of the JWST proposal (GO5308) that this proposal aims to support, and with Dr O'Donoghue are experts in analysing infrared spectra and magnetosphere-ionosphere coupling. Dr Tao has developed an auroral emission model for Saturn, and is an expert in spectral analysis relevant to this proposal. Solar System Astronomy 6 false true false false false false true PRIMARY 11.8 true SUPPORTED SOLAR SYSTEM Offset with POS_ANGLE to cover northern auroral region PLANET Saturn-aurora-north STD=SATURN TYPE=POS_ANGLE,RAD=8,ANG=4,REF=NORTH NOT ECL P PARTIAL OF SATURN-AURORA-NORTH BY TITAN FROM EARTH, SEP OF SATURN-AURORA-NORTH RHEA FROM EARTH GT 10", SEP OF SATURN-AURORA-NORTH TITAN FROM EARTH GT 10" EARTH SOLAR SYSTEM Image of full planet disk covering both north and south auroral regions PLANET Saturn-aurora-image-NS STD=SATURN NOT ECL P PARTIAL OF SATURN-AURORA-NS BY TITAN FROM EARTH, SEP OF SATURN-AURORA-NS RHEA FROM EARTH GT 10", SEP OF SATURN-AURORA-NS TITAN FROM EARTH GT 10" EARTH SOLAR SYSTEM Offset with POS_ANGLE to cover southern auroral region: ~78 deg S planetographic latitude PLANET Saturn-aurora-south STD=SATURN TYPE=POS_ANGLE,RAD=7.7,ANG=184,REF=NORTH NOT ECL P PARTIAL OF SATURN-AURORA-SOUTH BY TITAN FROM EARTH, SEP OF SATURN-AURORA-SOUTH RHEA FROM EARTH GT 10", SEP OF SATURN-AURORA-SOUTH TITAN FROM EARTH GT 10" EARTH STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Spectroscopic No No G140L 1425 /private/var/folders/t2/jfdgj7_13h70hn396qx5sbfh0000gn/T/OPVisit14353803565160687385.xml Using ephemeris for target 17825-N1-SATURN-AURORA-SOUTH ephemeris data for target 17825-N1-SATURN-AURORA-SOUTH does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.214 to 26.120. ephemeris interval: 25.090 to 27.091 Timing link suitability includes constraints ([Group (N1 N2 N3) Within 0.5 days]) The scheduling data was generated by CASM 33.0. CASM was run in Phase II mode. Image and spectra of southern aurora, position offset to southern polar region. 1/3 grouped orbits. Update POS_ANGLE once window confirmed. (Tic-Visit :proposal-id 17825 :visit-id "N1" :proposal-version -1 :trans-version "20241216" :date "06-Apr-2025 22:46:03.0" :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 1269840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17825 :visit-id "N1" :obset-id "N1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17825 :visit-id "N1" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2265 :al-overhead-at-end 0 :internal-dur-at-end 631 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2645 :pcs-gap 0 ) true 1 0 /private/var/folders/t2/jfdgj7_13h70hn396qx5sbfh0000gn/T/OPVisit15377263742362943164.xml Using ephemeris for target 17825-N2-SATURN-AURORA-NORTH ephemeris data for target 17825-N2-SATURN-AURORA-NORTH does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.214 to 26.120. ephemeris interval: 25.090 to 27.091 Timing link suitability includes constraints ([Group (N1 N2 N3) Within 0.5 days]) The scheduling data was generated by CASM 33.0. CASM was run in Phase II mode. Image and spectra of northern aurora, position offset to northern polar region. 2/3 grouped orbits. Update POS_ANGLE once window confirmed. (Tic-Visit :proposal-id 17825 :visit-id "N2" :proposal-version -1 :trans-version "20241216" :date "06-Apr-2025 22:46:03.0" :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 1269840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17825 :visit-id "N2" :obset-id "N2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17825 :visit-id "N2" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2265 :al-overhead-at-end 0 :internal-dur-at-end 631 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2645 :pcs-gap 0 ) true 1 0 /private/var/folders/t2/jfdgj7_13h70hn396qx5sbfh0000gn/T/OPVisit6807406947535213743.xml Using ephemeris for target 17825-N3-SATURN-AURORA-SOUTH ephemeris data for target 17825-N3-SATURN-AURORA-SOUTH does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.214 to 26.120. ephemeris interval: 25.090 to 27.091 Timing link suitability includes constraints ([Group (N1 N2 N3) Within 0.5 days]) The scheduling data was generated by CASM 33.0. CASM was run in Phase II mode. Image and spectra of southern aurora, position offset to southern polar region. 3/3 grouped orbits. Update POS_ANGLE once window confirmed. (Tic-Visit :proposal-id 17825 :visit-id "N3" :proposal-version -1 :trans-version "20241216" :date "06-Apr-2025 22:46:03.0" :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 1269840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17825 :visit-id "N3" :obset-id "N3" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17825 :visit-id "N3" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2265 :al-overhead-at-end 0 :internal-dur-at-end 631 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2645 :pcs-gap 0 ) true 1 0 /private/var/folders/t2/jfdgj7_13h70hn396qx5sbfh0000gn/T/OPVisit4891771218140049457.xml Using ephemeris for target 17825-N4-SATURN-AURORA-NORTH ephemeris data for target 17825-N4-SATURN-AURORA-NORTH does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.214 to 26.120. ephemeris interval: 25.090 to 27.091 Timing link suitability includes constraints ([Group (N4 N5 N6) Within 0.5 days]) The scheduling data was generated by CASM 33.0. CASM was run in Phase II mode. Image and spectra of northern aurora, position offset to northern polar region. 1/3 grouped orbits. Update POS_ANGLE once window confirmed. (Tic-Visit :proposal-id 17825 :visit-id "N4" :proposal-version -1 :trans-version "20241216" :date "06-Apr-2025 22:46:04.0" :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 1269840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17825 :visit-id "N4" :obset-id "N4" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17825 :visit-id "N4" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2265 :al-overhead-at-end 0 :internal-dur-at-end 631 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2645 :pcs-gap 0 ) true 1 0 /private/var/folders/t2/jfdgj7_13h70hn396qx5sbfh0000gn/T/OPVisit14366852895703561069.xml Using ephemeris for target 17825-N5-SATURN-AURORA-SOUTH ephemeris data for target 17825-N5-SATURN-AURORA-SOUTH does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.214 to 26.120. ephemeris interval: 25.090 to 27.091 Timing link suitability includes constraints ([Group (N4 N5 N6) Within 0.5 days]) The scheduling data was generated by CASM 33.0. CASM was run in Phase II mode. Image and spectra of southern aurora, position offset to southern polar region. 2/3 grouped orbits. Update POS_ANGLE once window confirmed. (Tic-Visit :proposal-id 17825 :visit-id "N5" :proposal-version -1 :trans-version "20241216" :date "06-Apr-2025 22:46:04.0" :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 1269840 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17825 :visit-id "N5" :obset-id "N5" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17825 :visit-id "N5" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2265 :al-overhead-at-end 0 :internal-dur-at-end 631 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2645 :pcs-gap 0 ) true 1 0 /private/var/folders/t2/jfdgj7_13h70hn396qx5sbfh0000gn/T/OPVisit3633458531523542960.xml Using ephemeris for target 17825-N6-SATURN-AURORA-NS ephemeris data for target 17825-N6-SATURN-AURORA-NS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.214 to 26.120. ephemeris interval: 25.090 to 27.091 Timing link suitability includes constraints ([Group (N4 N5 N6) Within 0.5 days]) The scheduling data was generated by CASM 33.0. CASM was run in Phase II mode. Imaging of Saturns northern and southern aurorae. 3/3 consecutive orbits, close in time to JWST observations. (Tic-Visit :proposal-id 17825 :visit-id "N6" :proposal-version -1 :trans-version "20241216" :date "06-Apr-2025 22:46:04.0" :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 1461216 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17825 :visit-id "N6" :obset-id "N6" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17825 :visit-id "N6" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2265 :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 2645 :pcs-gap 0 ) true 1 0