0 Assigned ID: 357 ----- Attempting Submission 1 (Fri Apr 07 01:08:42 GMT 2017) ----- For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. REFERENCE-FRAME MUST BE ICRS OR GSC1 FOR SMALL APERTURE REFERENCE-FRAME MUST BE ICRS OR GSC1 FOR SMALL APERTURE A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. Hello! Looks like changing the orbits by 63 seconds removed the scheduling error. This is surprising since I used the auto-adjust tool on the Orbit Planner to fill the time. Thank you for the help! 172706910 ----- Attempting Submission 1 (Wed Jul 19 16:00:33 GMT 2017) ----- HST Phase II Proposal 15094 (APT_PhaseII_15094_draft.apt.2017_07_12_15_47.aptbackup) successfully submitted. Receipt: # 15094-1 ----- Attempting Submission 2 (Wed Jul 19 21:12:18 GMT 2017) ----- Current errors include the warning about using ICRS (which we did) and using an ACQ for every orbit. We assumed one aquisition at the beginning of the Visit would be sufficient, but please let us know if we should add a short ACQ to every orbit. Thank you! For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. Unschedulable Visit REFERENCE-FRAME MUST BE ICRS OR GSC1 FOR SMALL APERTURE REFERENCE-FRAME MUST BE ICRS OR GSC1 FOR SMALL APERTURE For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. Unschedulable Visit REFERENCE-FRAME MUST BE ICRS OR GSC1 FOR SMALL APERTURE For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. Unschedulable Visit REFERENCE-FRAME MUST BE ICRS OR GSC1 FOR SMALL APERTURE For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. Unschedulable Visit REFERENCE-FRAME MUST BE ICRS OR GSC1 FOR SMALL APERTURE For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. Unschedulable Visit REFERENCE-FRAME MUST BE ICRS OR GSC1 FOR SMALL APERTURE 0 Stellar Occultation by Saturn's Rings in the UV We propose to capitalize on the unique opportunity to observe the July 2018 stellar occultation of the star HD 168233 by Saturn's rings using the COS G230L mode on HST. Our program will characterize the particle size distribution of the rings through analyses of the starlight diffracted by the ring particles. It will also define the shape and structure of the rings through measurements of the optical depth of the variable F ring, the characterization of the self-gravity wakes, and by constraining the A ring edge dynamics six months after the radial swap of the co-orbital moons Janus and Epimetheus, which maintain the ring's outer edge. Saturn's rings are very dark at UV wavelengths; therefore, stellar occultations in the UV have a significantly lower background signal from the ring-reflected sunlight than at longer wavelengths. Furthermore, occultations at UV wavelengths are sensitive to the smallest particles in the rings. The geometry and wavelengths of the stellar occultation from HST COS will complement and extend the science return from the Cassini spacecraft nearly one year after the mission's end. We propose to observe the stellar occultation of HD 168233 by Saturns rings with one visit consisting of five HST orbits to ensure we encompass the entire occultation. Each orbit will remain fixed on the star as Saturn and its rings pass through the instrument field of view (FOV). We will use the COS G320 L mode centered on 300 nm in Time-Tag mode to obtain spectral information with a high SNR for short integration periods. We will implement the COS observation technique described by Cunningham et al. (2015), which offsets the primary signal source (in our case, the star) by 0.35 arcseconds in the cross-dispersion (COS +y) direction. We can then use the signal observed in the lower half of the COS aperture as an estimate of the background flux, the majority of which will emanate from the ring-reflected sunlight and terrestrial airglow. Solar System Planets and Planet Formation 6 false false true false false false false SUPPORTED STAR A4-A9 V-IV NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 COS/NUV Spectroscopic No No G230L 3000 Timing link suitability includes constraints ([02 After 01 by at most 0.1 days]) The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. All orbits will be the same setup. (Tic-Visit :proposal-id 15094 :visit-id "01" :proposal-version -1 :trans-version "20180409" :date "27-Jun-2018 14:04:48.0" :trans-errors '(:WARNINGS 2 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "32" :si-bright-earth-limb-angle 20.0 :data-volume 400144 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15094 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15094 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 929 :al-overhead-at-end 0 :internal-dur-at-end 398 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3217 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([02 After 01 by at most 0.1 days] [03 After 02 by at most 0.1 days]) The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. All orbits will be the same setup. (Tic-Visit :proposal-id 15094 :visit-id "02" :proposal-version -1 :trans-version "20180409" :date "26-Jun-2018 12:00:34.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "32" :si-bright-earth-limb-angle 20.0 :data-volume 434832 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15094 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15094 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 689 :al-overhead-at-end 0 :internal-dur-at-end 455 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3217 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([03 After 02 by at most 0.1 days] [04 After 03 by at most 0.1 days]) The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. All orbits will be the same setup. (Tic-Visit :proposal-id 15094 :visit-id "03" :proposal-version -1 :trans-version "20180409" :date "26-Jun-2018 12:00:34.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "32" :si-bright-earth-limb-angle 20.0 :data-volume 573984 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15094 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15094 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 899 :al-overhead-at-end 0 :internal-dur-at-end 436 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3217 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([04 After 03 by at most 0.1 days] [05 After 04 by at most 0.1 days]) The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. /solaris/user1/bporterfield/hst/work/OP-cache/15094-v04.xml All orbits will be the same setup. (Tic-Visit :proposal-id 15094 :visit-id "04" :proposal-version -1 :trans-version "20180409" :date "27-Jun-2018 14:22:33.0" :trans-errors '(:WARNINGS 2 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "32" :si-bright-earth-limb-angle 20.0 :data-volume 1574224 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15094 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15094 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2846 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3217 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([05 After 04 by at most 0.1 days]) The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. All orbits will be the same setup. (Tic-Visit :proposal-id 15094 :visit-id "05" :proposal-version -1 :trans-version "20180409" :date "26-Jun-2018 12:00:36.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "32" :si-bright-earth-limb-angle 20.0 :data-volume 1826336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15094 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15094 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2821 :al-overhead-at-end 0 :internal-dur-at-end 436 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3217 :pcs-gap 0 ) true 1 0