Anchoring Mira Distance Ladder: Bridging Ground-Based, Optical, and Next-Generation Observations with WFC3/IR

0 Assigned ID: 7666 ----- Attempting Submission 1 (Thu Apr 16 21:23:56 GMT 2026) ----- HST Phase I Proposal 7666 successfully submitted. Receipt: # 7666-1 ----- Attempting Submission 2 (Thu Apr 16 22:47:36 GMT 2026) ----- HST Phase I Proposal 7666 successfully submitted. Receipt: # 7666-2 ----- Attempting Submission 3 (Thu Apr 16 22:52:19 GMT 2026) ----- HST Phase I Proposal 7666 successfully submitted. Receipt: # 7666-3 ----- Attempting Submission 4 (Thu Apr 16 22:55:17 GMT 2026) ----- Everything has run without error. 4033254 ----- Attempting Submission 1 (Tue Aug 18 05:17:03 GMT 2026) ----- Anchoring Mira Distance Ladder: Bridging Ground-Based, Optical, and Next-Generation Observations with WFC3/IR The discrepancy between the local and early-Universe measurements of the Hubble constant (H0) remains a key unresolved issue in cosmology. The tension has grown even more robust in recent joint analysis from the Local Distance Network collaboration, with a baseline result 7.1sigma from the early Universe + LambdaCDM value, hinting at missing physics beyond the standard model. In this networked approach, reducing reliance on any single method requires robust cross-checks between independent indicators. Luminous, oxygen-rich Mira variables are uniquely positioned to provide these vital cross-checks across all distances and host environments. To maximize the utility of HST's archival WFC3/IR data before the instrument's eventual decommissioning, we propose new, multi-epoch observations of three nearby galaxies: NGC 4258, NGC 5128, and M51. Combined with archival data, this program will 1) extend and improve the absolute calibration of the Mira Period-Luminosity Relation, 2) bridge HST and ground-based IR filter systems, 3) demonstrate the feasibility of obtaining Mira distances across diverse galaxy environments, and 4) conduct a novel cross-checks against Cepheids, TRGB, and the Type IIP supernova expanding photosphere method. Because neither JWST nor Roman can replicate Hubble's observational flexibility and cadence for nearby resolved stellar populations, this program represents an essential, time-sensitive investment to finalize the Mira distance scale. This program consists of a total of 33 orbits divided between Cycle 34 (22 orbits) and Cycle 35 (11 orbits). We will target 3 galaxies: M51, Cen A, and NGC 4258. The observations are designed to synergize with the existing archival observations while allowing as large of visibility windows as possible. In order to recover periods precisely, we have designated the necessary timing requirements in the observation setups. All observations will be made with WFC3/IR and do not have any orientation angle constraints. Targets are resolved stellar populations in nearby galaxies. NGC 4258 and M51 are located at ~ 7 Mpc, and thus we will observe only F160W to increase the recovery of fainter, shorter-period stars. Cen A, which is at ~3.5 Mpc will be observed in both F160W and F110W to add broadband color information. Cycle 34 Observations NGC 4258: 1 field which will be observed in 5 epochs, each consisting of 1 orbit. Observations will utilize a four-point dither pattern and F160W filter. Observations will have a semi-logarithmic spacing to reduce potential aliasing, while also recovering shorter periods more accurately. Cen A: 2 fields (F1 and F2, based on the designations from Rejkuba+2003a,b and 2004), each with 5 epochs, consisting of 1 orbit (a total of 10 epochs/orbits). Observations will utilize a four-point dither pattern and F160W and F110W filters. Observations will be spaced approximately monthly over the course of the year during visibility windows. M51: 1 field which will be observed in 7 epochs each consisting of 1 orbit. Observations will utilize a four-point dither pattern and F160W filter. Observations will have roughly monthly spacing over the course of a year. Cycle 35 Observations NGC 4258: No observations in Cycle 35. Cen A: 2 fields observed in 3 epochs consisting of 1 orbit each (a total of 6 orbits). Observations will utilize a four-point dither pattern and F160W and F110W filters. Observing over Cycle 34 and 35 will improve the baseline for long-period variables. M51: 1 field observed in 5 epochs, consisting of 1 orbit each for a total of 5 orbits. Observations will utilize a four-point dither pattern and F160W filter. Combined with Cycle 34 observations these will result in an improved long-period variable baseline. Dr. Caroline Huang is an expert in distance measurements with AGB stars and the Mira distance ladder Dr. Adam G. Riess is an expert in observational cosmology, supernovae, and distance indicators. Mr. Antonio Capodagli is experienced in the usage of long-period variables in obtaining distances and Dr. Geza Csoernyei is an expert in applying the Type IIP supernovae expanding photosphere method to the distance ladder. Dr. Louise Breuval is an expert in Cepheid distance measurements and the metallicity effect on the Cepheid PLR. Dr. Lucas Macri is an expert in distance measurements and resolved stellar populations. Dr. Marina Rejkuba is an expert in the study of resolved stellar populations in in nearby galaxies. Dr. Massimo Marengo is an expert in distance measurements with RR Lyrae, Miras, and Cepheids. Dr. Stefano Casertano is an expert in distance indicators, the local distance ladder, and the Hubble tension. Dr. Wenlong Yuan is an expert in distance measurements with Cepheids and Miras. Stellar Populations and the Interstellar Medium Galaxies 6 false false false false true false false false false false SUPPORTED GALAXY DISK SPIRAL SPIRAL ARM J2000 J2000 GALAXY ELLIPTICAL LENTICULAR J2000 J2000 GALAXY ELLIPTICAL LENTICULAR J2000 J2000 GALAXY DISK SPIRAL SPIRAL ARM J2000 J2000 Timing link suitability includes constraints ([002 After 001 by 20.0 to 40.0 days] [003 After 001 by 100.0 to 120.0 days] [004 After 001 by 170.0 to 220.0 days] [005 After 001 by 300.0 to 365.0 days]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([002 After 001 by 20.0 to 40.0 days]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([003 After 001 by 100.0 to 120.0 days]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([004 After 001 by 170.0 to 220.0 days]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([005 After 001 by 300.0 to 365.0 days]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([007 After 006]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([007 After 006] [008 After 007]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([008 After 007] [009 After 008]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([009 After 008] [010 After 009]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([010 After 009] [011 After 010]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([015 After 014]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([015 After 014] [016 After 015]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([016 After 015] [017 After 016]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([017 After 016] [018 After 017]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([018 After 017] [019 After 018]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W Timing link suitability includes constraints ([017 After 016]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([017 After 016] [018 After 017]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([018 After 017] [019 After 018]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([019 After 018] [020 After 019]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([020 After 019] [021 After 020]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([021 After 020] [022 After 021]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W Timing link suitability includes constraints ([022 After 021]) The scheduling data was generated by CASM 34.0. CASM was run in Phase I mode. WFC3/IR Imaging No No F160W POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 1

false

1787028857026 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit8311927609340579923.xml Timing link suitability includes constraints ([02 After 01 by 20.0 to 40.0 days] [03 After 01 by 100.0 to 120.0 days] [04 After 01 by 170.0 to 220.0 days] [05 After 01 by 300.0 to 365.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "01" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:16.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "01" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028857211 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit3735280805354486005.xml Timing link suitability includes constraints ([02 After 01 by 20.0 to 40.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "02" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "02" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028857391 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit2849766363847647171.xml Timing link suitability includes constraints ([03 After 01 by 100.0 to 120.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "03" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "03" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028857574 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit3545968560267352890.xml Timing link suitability includes constraints ([04 After 01 by 170.0 to 220.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "04" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "04" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028857757 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit5300544593111227274.xml Timing link suitability includes constraints ([05 After 01 by 300.0 to 365.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "05" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "05" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028858053 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit9725411676713729540.xml Timing link suitability includes constraints ([07 After 06 by 5.0 to 30.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "06" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "06" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028858358 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit5067097026581694186.xml Timing link suitability includes constraints ([07 After 06 by 5.0 to 30.0 days] [08 After 07 by 20.0 to 110.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "07" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:18.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "07" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028858660 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit14811368093483525769.xml Timing link suitability includes constraints ([08 After 07 by 20.0 to 110.0 days] [09 After 08 by 20.0 to 110.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "08" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:18.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "08" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028858967 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit16143789901639213189.xml Timing link suitability includes constraints ([09 After 08 by 20.0 to 110.0 days] [10 After 09 by 20.0 to 110.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "09" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:18.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "09" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028859273 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit5567990165127068224.xml Timing link suitability includes constraints ([10 After 09 by 20.0 to 110.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "10" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:19.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "10" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028859754 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit11047584986282129694.xml Timing link suitability includes constraints ([12 After 11 by 5.0 to 30.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "11" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:19.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "11" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028860053 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit16548521866132975558.xml Timing link suitability includes constraints ([12 After 11 by 5.0 to 30.0 days] [13 After 12 by 20.0 to 110.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "12" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:19.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "12" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028860352 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit11776212079445034712.xml Timing link suitability includes constraints ([13 After 12 by 20.0 to 110.0 days] [14 After 13 by 20.0 to 110.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "13" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "13" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028860664 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit136499725549451556.xml Timing link suitability includes constraints ([14 After 13 by 20.0 to 110.0 days] [15 After 14 by 20.0 to 110.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "14" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "14" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028860969 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit14712161355057266790.xml Timing link suitability includes constraints ([15 After 14 by 20.0 to 110.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "15" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1880192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "15" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3001 :pcs-gap 0 ) true 1 0 1787028861165 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit5136900697336870893.xml Timing link suitability includes constraints ([17 After 16 by 20.0 to 70.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "16" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "16" :obset-id "16" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "16" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028861348 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit2531465155432755889.xml Timing link suitability includes constraints ([17 After 16 by 20.0 to 70.0 days] [18 After 17 by 20.0 to 90.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "17" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "17" :obset-id "17" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "17" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028861531 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit14837992248120970131.xml Timing link suitability includes constraints ([18 After 17 by 20.0 to 90.0 days] [19 After 18 by 20.0 to 90.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "18" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "18" :obset-id "18" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "18" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028861714 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit8059050865325063703.xml Timing link suitability includes constraints ([19 After 18 by 20.0 to 90.0 days] [20 After 19 by 20.0 to 70.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "19" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "19" :obset-id "19" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "19" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028861901 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit2939297769808995489.xml Timing link suitability includes constraints ([20 After 19 by 20.0 to 70.0 days] [21 After 20 by 25.0 to 70.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "20" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "20" :obset-id "20" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "20" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028862078 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit12110174465598904043.xml Timing link suitability includes constraints ([21 After 20 by 25.0 to 70.0 days] [22 After 21 by 20.0 to 120.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "21" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "21" :obset-id "21" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "21" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0 1787028862269 /private/var/folders/_8/84bh0rl93g70psrhn9f3z4ch0000gn/T/OPVisit6564392674786137478.xml Timing link suitability includes constraints ([22 After 21 by 20.0 to 120.0 days]) The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18419 :visit-id "22" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 00:54:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18419 :visit-id "22" :obset-id "22" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18419 :visit-id "22" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2640 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 1 0