The number of orbits used exceeds the number allocated Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. 5/15/17 Added visit 03 as a "buddy visit" to schedule prior to visit 02 on June 12 -943532873 ----- Attempting Submission 1 (Tue May 02 18:15:08 GMT 2017) ----- ----- Attempting Submission 2 (Wed May 03 17:53:31 GMT 2017) ----- ----- Attempting Submission 3 (Mon May 15 14:32:06 GMT 2017) ----- The observations use a mode that has been utilized many times before. Coordinated HST and SOFIA observations of Europa's plumes The presence of plumes of water ice venting from the icy surface of Europa is of tremendous interest to the scientific community, NASA and the general public, as it offers the prospect of access to material that was once in Europa's ocean without the need to drill through miles of ice. With a proven method that has returned crucial scientific data, and garnered exceptional attention, we propose two additional HST observations of Europa as it transits the smooth face of Jupiter, to bracket upcoming observations on NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA), May 26, 2017. That program is deemed of strategic importance to SOFIA, and a special flight has been arranged to observe the crucial trailing hemisphere where the best plume candidate is to be found. In Sparks et al (2017) it was shown that the candidate has repeated and that it is coincident with a thermal anomaly, as might be expected by analogy with Enceladus. With high-resolution SOFIA mid-IR spectroscopy, we will seek water vapor directly, and esimate surface temperatures at longer wavelengths. Here, we propose to establish whether there is evidence of ongoing contemporaneous plume activity viewed in the FUV by bracketing the SOFIA observation as closely as the schedule allows, offering the prospect of fully validating the HST inference that there are active water plumes. If the ice plumes of Europa arise from the deep ocean, we have gained access to probably the most astrobiologically interesting location in the Solar System. We will use the high resolution TIME-TAG FUV imaging mode of STIS, to obtain two images of Europa in transit against the face of Jupiter, timed to bracket an upcoming SOFIA observation. We will use the F25SRF2 filter and drift the image of Europa across the detector using moving target specifications to Level 3. Each image is a single visit, of maximum duration permitted by the orbit. Solar System 0 SUPPORTED SOLAR SYSTEM SATELLITE Satellite Europa STD=JUPITER STD=EUROPA TYPE=POS_ANGLE,RAD=6.5,ANG=249.0,REF=NORTH,R_RAD=-51.,R_ANG=0,EPOCH=26-MAY-2017:03:56:50,EpochTimeScale=UTC TRANSIT OF EUROPA ACROSS JUPITER FROM EARTH, SEP OF EUROPA JUPITER FROM EARTH LT -5" EARTH SOLAR SYSTEM SATELLITE Satellite Europa STD=JUPITER STD=EUROPA TYPE=POS_ANGLE,RAD=6.5,ANG=231.0,REF=NORTH,R_RAD=-51.,R_ANG=0,EPOCH=12-JUN-2017:21:57:05,EpochTimeScale=UTC TRANSIT OF EUROPA ACROSS JUPITER FROM EARTH, SEP OF EUROPA JUPITER FROM EARTH LT -5" EARTH STIS/FUV-MAMA Imaging No No F25SRF2 STIS/FUV-MAMA Imaging No No F25SRF2 Using ephemeris for target 14930-01-EUROPA-TRANSIT-1 ephemeris data for target 14930-01-EUROPA-TRANSIT-1 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.121. ephemeris interval: 17.120 to 19.121 The scheduling data was generated by CASM 25.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14930 :visit-id "01" :proposal-version -1 :trans-version "20170109" :date "03-May-2017 13:51:40.0" :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 1878720 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14930 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14930 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2775 :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 3210 :pcs-gap 0 ) false 1 0 Using ephemeris for target 14930-02-EUROPA-TRANSIT-2 ephemeris data for target 14930-02-EUROPA-TRANSIT-2 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.121. ephemeris interval: 17.120 to 19.121 The scheduling data was generated by CASM 25.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14930 :visit-id "02" :proposal-version -1 :trans-version "20170109" :date "03-May-2017 13:51:41.0" :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 1878720 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14930 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14930 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2775 :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 3210 :pcs-gap 0 ) false 1 0 /private/var/folders/h2/_3b1kkv56nn2rfp1zrxtm0sc0006z1/T/OPVisit5258522823922621213.xml This visit is set as a "buddy visit" to turn on the MAMA prior to the beginning of visit 02 (Tic-Visit :proposal-id 14930 :visit-id "03" :proposal-version -1 :trans-version "20170109" :date "15-May-2017 10:23:30.0" :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 0.0 :data-volume 69584 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14930 :visit-id "03" :obset-id "03" :pcs-mode "GYRO" ) (Tic-Orbit :proposal-id 14930 :visit-id "03" :orbit-number 1 :pcs-time 0 :si-vis-utilization 0 :al-overhead-at-end 0 :internal-dur-at-end 1388 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3210 :pcs-gap 0 ) true 1 0