We propose UV observations using the ACS/SBC of Titan's extended escaping atmosphere for the Jan/Feb 2009 period of transits of Titan across Saturn. A combination of absorption of Saturn's reflected solar UV emission in transit, and extended emissions primarily from H atoms away from transit, will yield new information about the structur of Titan's extended upper atmosphere. These observations are expected to provide new constraints on theoretical models for a hydrodynamic flow of species through Titan's exobase level, resulting from the interpreation of recent Cassini measurements at Titan.

tbd 0 false 0.0 0.0 false false false false false SUPPORTED SOLAR SYSTEM SATELLITE Titan center before inferior conjunction STD=SATURN STD=TITAN EARTH SOLAR SYSTEM SATELLITE Titan Transiting Saturn STD=SATURN STD=TITAN EARTH SOLAR SYSTEM SATELLITE Titan center after inferior conjunction STD=SATURN STD=TITAN EARTH SOLAR SYSTEM SATELLITE Sky 5 arc min north of Titan STD=SATURN STD=TITAN TYPE=POS_ANGLE,RAD=300.,ANG=0.,REF=NORTH EARTH Using ephemeris for target 11970-01-TITAN-TRANSIT ephemeris data for target 11970-01-TITAN-TRANSIT does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 07.182 to 10.001. ephemeris interval: 08.366 to 11.001 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Titan in transit of Saturn disc on 23 Jan 2009. Track on Titan, not Saturn. (Tic-Visit :proposal-id 11970 :visit-id "01" :proposal-version -1 :trans-version "20080807" :date "06-Jan-2009 16:00:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 610960 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11970 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11970 :visit-id "01" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2726 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "01" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "01" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 221 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) true 3 0 Using ephemeris for target 11970-02-TITAN-POST-INF-CONJ ephemeris data for target 11970-02-TITAN-POST-INF-CONJ does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 07.182 to 10.001. ephemeris interval: 08.366 to 11.001 Using ephemeris for target 11970-02-SKY-NEAR-TITAN ephemeris data for target 11970-02-SKY-NEAR-TITAN does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 07.182 to 10.001. ephemeris interval: 08.366 to 11.001 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Titan away from Saturn post-transit. (Tic-Visit :proposal-id 11970 :visit-id "02" :proposal-version -1 :trans-version "20080807" :date "06-Jan-2009 15:57:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 1018256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11970 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 11970 :visit-id "02" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11970 :visit-id "02" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2726 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "02" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "02" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "02" :orbit-number 4 :pcs-time 355 :si-vis-utilization 2711 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "02" :orbit-number 5 :pcs-time 355 :si-vis-utilization 2690 :al-overhead-at-end 0 :internal-dur-at-end 342 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 5 0 Using ephemeris for target 11970-03-TITAN-POST-INF-CONJ ephemeris data for target 11970-03-TITAN-POST-INF-CONJ does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 07.182 to 10.001. ephemeris interval: 08.366 to 11.001 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Titan away from Saturn post-transit. (Tic-Visit :proposal-id 11970 :visit-id "03" :proposal-version -1 :trans-version "20080807" :date "06-Jan-2009 15:58:50.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 1018256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11970 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11970 :visit-id "03" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2726 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "03" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "03" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "03" :orbit-number 4 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "03" :orbit-number 5 :pcs-time 355 :si-vis-utilization 2667 :al-overhead-at-end 0 :internal-dur-at-end 342 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) true 5 0 Using ephemeris for target 11970-04-TITAN-PRE-INF-CONJ ephemeris data for target 11970-04-TITAN-PRE-INF-CONJ does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 07.182 to 10.001. ephemeris interval: 08.366 to 11.001 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Titan away from Saturn pre-transit. (Tic-Visit :proposal-id 11970 :visit-id "04" :proposal-version -1 :trans-version "20080807" :date "06-Jan-2009 16:00:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 1018256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11970 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11970 :visit-id "04" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2726 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "04" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "04" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "04" :orbit-number 4 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "04" :orbit-number 5 :pcs-time 355 :si-vis-utilization 2667 :al-overhead-at-end 0 :internal-dur-at-end 342 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) true 5 0 Using ephemeris for target 11970-05-TITAN-TRANSIT ephemeris data for target 11970-05-TITAN-TRANSIT does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 07.182 to 10.001. ephemeris interval: 08.366 to 11.001 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Titan in transit of Saturn disc on 8 Feb 2009. Track on Titan, not Saturn. (Tic-Visit :proposal-id 11970 :visit-id "05" :proposal-version -1 :trans-version "20080807" :date "06-Jan-2009 16:02:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 610960 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11970 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11970 :visit-id "05" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2726 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "05" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "05" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 221 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) false 3 0 Using ephemeris for target 11970-06-TITAN-POST-INF-CONJ ephemeris data for target 11970-06-TITAN-POST-INF-CONJ does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 07.182 to 10.001. ephemeris interval: 08.366 to 11.001 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Titan away from Saturn post-transit. (Tic-Visit :proposal-id 11970 :visit-id "06" :proposal-version -1 :trans-version "20080807" :date "06-Jan-2009 16:01:57.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 1018256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11970 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11970 :visit-id "06" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2726 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "06" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "06" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "06" :orbit-number 4 :pcs-time 355 :si-vis-utilization 2685 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11970 :visit-id "06" :orbit-number 5 :pcs-time 355 :si-vis-utilization 2667 :al-overhead-at-end 0 :internal-dur-at-end 342 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) true 5 0