third try fourth -971645726 Assigned ID: 6753 ----- Attempting Submission 1 (Thu Apr 10 22:00:07 GMT 2025) ----- HST Phase I Proposal 6753 successfully submitted. Receipt: # 6753-1 ----- Attempting Submission 2 (Thu Apr 10 22:36:18 GMT 2025) ----- HST Phase I Proposal 6753 successfully submitted. Receipt: # 6753-2 ----- Attempting Submission 3 (Thu Apr 10 22:43:04 GMT 2025) ----- HST Phase I Proposal 6753 successfully submitted. Receipt: # 6753-3 ----- Attempting Submission 4 (Thu Apr 10 22:49:04 GMT 2025) ----- The number of orbits used exceeds the number allocated MERGING RULE VIOLATED DURING AUTOMATIC MERGING MERGING RULE VIOLATED DURING AUTOMATIC MERGING MERGING RULE VIOLATED DURING AUTOMATIC MERGING MERGING RULE VIOLATED DURING AUTOMATIC MERGING MERGING RULE VIOLATED DURING AUTOMATIC MERGING MERGING RULE VIOLATED DURING AUTOMATIC MERGING MERGING RULE VIOLATED DURING AUTOMATIC MERGING put two on hold 5 and 6 and added two 10 and 11 Would like to replace visit 7 about to schedule with visit 13, same target, same length -1290324012 ----- Attempting Submission 2 (Thu Jan 15 16:38:48 GMT 2026) ----- ----- Attempting Submission 3 (Fri Mar 06 15:57:21 GMT 2026) ----- 5 and 6 on hold, added 10 and 11 Would like to replace visit 7 about to schedule with visit 13, same target, same length Golden Cepheids in Open Clusters; A Complete HST+Gaia Reference Sample to Optimize the Hubble Constant The Hubble tension, a 5-sigma discrepancy between the measured and cosmologically predicted value of the Hubble constant (H0) is one of the most compelling developments in cosmology in decades. Having withstood scrutiny and extensive crosschecks, it now demands pursuit with maximum signal-to-noise and a clear path to future improvements. The leading H0 determination is based on photometric observations of 14 Milky Way Cepheids in open clusters whose companion stars provide the opportunity to average-down errors and provide extreme parallax precision with Gaia. These calibrate Cepheids in the hosts of 42 local SN Ia, minimizing zeropoint errors through uniform WFC3 use. The recently released Gaia DR3 has provided the opportunity to discover new open clusters and established the association (through positions and proper motions) with 10 additional "golden" Cepheids. We propose two goals to optimize the current HST-based H0 measurement while supporting JWST calibration: (1) complete the high-leverage MW Cepheid sample by observing the final 10 with WFC3, to produce a 30% reduction in the uncertainty, and (2) obtain WFC3-IR NIR grism spectrophotometry at 0.8-1.7 micron of these stars to synthesize their magnitudes in JWST filters (F090W, F115W, F150W), empirically calibrating JWST's emerging distance ladder. These data will sharpen the current Gaia-based H0 and enable future gains. This effort will lay a cornerstone for a <1% H0 determination and further our understanding of what may be a fundamental shift in the cosmological model. tbd Adam Riess is the PI of SH0ES and is expert in measuring Cepheids, spatial scanning, photometry Stefano Casertano has extensive experience measuring spatial scanning, photometry, and analysis Stellar Physics and Stellar Types 6 false false false false false false false AVAILABLE STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F098M WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/williamj/hst/work/cycle33/OP-cache/18052-v01.xml (Tic-Visit :proposal-id 18052 :visit-id "01" :proposal-version -1 :trans-version "20250624" :date "22-Oct-2025 08:22:24.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "01" :obset-id "A1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "01" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2069 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3064 :pcs-gap 0 ) false 1 0 staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/williamj/hst/work/cycle33/OP-cache/18052-v02.xml (Tic-Visit :proposal-id 18052 :visit-id "02" :proposal-version -1 :trans-version "20250624" :date "22-Oct-2025 08:22:26.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "02" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "02" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2069 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3064 :pcs-gap 0 ) false 1 0 staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/williamj/hst/work/cycle33/OP-cache/18052-v03.xml (Tic-Visit :proposal-id 18052 :visit-id "03" :proposal-version -1 :trans-version "20250624" :date "22-Oct-2025 08:22:27.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "03" :obset-id "A3" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "03" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2069 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3026 :pcs-gap 0 ) false 1 0 staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/williamj/hst/work/cycle33/OP-cache/18052-v04.xml (Tic-Visit :proposal-id 18052 :visit-id "04" :proposal-version -1 :trans-version "20250624" :date "22-Oct-2025 08:22:29.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "04" :obset-id "A4" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "04" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2069 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) false 1 0 staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/williamj/hst/work/cycle33/OP-cache/18052-v05.xml (Tic-Visit :proposal-id 18052 :visit-id "05" :proposal-version -1 :trans-version "20250624" :date "22-Oct-2025 08:22:31.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "05" :obset-id "A5" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "05" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2069 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) false 1 0 withdrawing staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/williamj/hst/work/cycle33/OP-cache/18052-v06.xml (Tic-Visit :proposal-id 18052 :visit-id "06" :proposal-version -1 :trans-version "20250624" :date "22-Oct-2025 08:22:32.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "06" :obset-id "A6" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "06" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2069 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3026 :pcs-gap 0 ) false 1 0 withdrawing staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18052 :visit-id "10" :proposal-version -1 :trans-version "20250624" :date "15-Jan-2026 11:35:31.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "10" :obset-id "A0" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "10" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2081 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2983 :pcs-gap 0 ) true 1 0 staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame (Tic-Visit :proposal-id 18052 :visit-id "06" :proposal-version -1 :trans-version "20250624" :date "22-Oct-2025 08:22:32.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "06" :obset-id "A6" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "06" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2069 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3026 :pcs-gap 0 ) false 1 0 staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame (Tic-Visit :proposal-id 18052 :visit-id "13" :proposal-version -1 :trans-version "20250624" :date "06-Mar-2026 10:49:43.0" :trans-errors '(:WARNINGS 7 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 877024 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "13" :obset-id "YA" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "13" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2143 :al-overhead-at-end 178 :internal-dur-at-end 379 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) false 1 0 IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame direct image direct image The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/williamj/hst/work/cycle33/OP-cache/18052-v08.xml (Tic-Visit :proposal-id 18052 :visit-id "08" :proposal-version -1 :trans-version "20250624" :date "22-Oct-2025 08:22:35.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "08" :obset-id "A8" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "08" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2069 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) false 1 0 staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/williamj/hst/work/cycle33/OP-cache/18052-v09.xml (Tic-Visit :proposal-id 18052 :visit-id "09" :proposal-version -1 :trans-version "20250624" :date "22-Oct-2025 08:22:36.0" :trans-errors '(:WARNINGS 12 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 592336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18052 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 18052 :visit-id "09" :obset-id "A9" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18052 :visit-id "09" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2069 :al-overhead-at-end 0 :internal-dur-at-end 684 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2987 :pcs-gap 0 ) false 1 0 staring mode IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field IR scan, Cepheid moves across field IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame