0 Assigned ID: 4222 ----- Attempting Submission 1 (Wed May 24 01:11:36 GMT 2023) ----- HST Phase I Proposal 4222 successfully submitted. Receipt: # 4222-1 ----- Attempting Submission 2 (Wed May 24 17:15:09 GMT 2023) ----- HST Phase I Proposal 4222 successfully submitted. Receipt: # 4222-2 Resubmission for new Visits 9 and 10; refer to HOPR 92765. But APT asked to reprocess the entire program, which I did. 918794225 ----- Attempting Submission 1 (Mon Sep 11 19:24:06 GMT 2023) ----- ----- Attempting Submission 2 (Thu Dec 07 20:23:59 GMT 2023) ----- ----- Attempting Submission 3 (Tue Mar 05 17:44:11 GMT 2024) ----- Expansion and Evolution of the Crab Nebula: A 23+ Year HST Perspective The Crab Nebula is an iconic and well-studied galactic core-collapse supernova remnant with an active pulsar energizing an expanding debris field created in the 1054 CE explosion. Because of its proximity and known age, it has become a key object for study across the EM spectrum. It is thus surprising that no emission line imagery has been obtained with HST since the WPFC2 mosaic dating to circa 2000. With an expansion velocity of roughly 1250 km/s and a distance of ~2 kpc, significant and spatially variable proper motions of the filamentary structures are expected, as well as possible changes in the detailed ionization structures and evolution of the synchrotron nebula over time. Many more recent data sets, including JWST Cycle 1 NIR and MIR images of the filaments, dust, and synchrotron emission, require a current epoch of HST optical imaging to make accurate comparisons. Thus, we propose new emission line mosaics of the Crab with WFC3 and filters comparable to those use in the earlier WFPC2 mosaic. A continuum band (F547M) will sample the synchrotron emission and allow subtraction from the emission line data. We also propose a second continuum band (F763M) which will be used to study spatial spectral index variations and compare to JWST IR synchrotron maps when they are available. Finally, a two F487N (Hbeta) fields will provide a clean hydrogen linemap for the central bright filaments, permitting improved abundance studies. Finally, since comparison to the earlier WFPC2 data are so important, we will reprocess these data to the same standards and reference frame as the new WFC3 data and archive all as a High Level Science Product. For the imaging mosaics with the F502N, F547M, F631N and F673N filters, the goal is to duplicate the field coverage and depth of the earlier WFPC2 mosaics with similar filters. Since the relative throughput of WFC3 relative to WFPC2 as a function of wavelength is well known (Fig. 1 in HDocs article ``HST Primer: Scientific Instrument Comparisons''), as are the exposure times used previously, it is straightforward to calculate comparable exposures times for the proposed WFC3 imagery. All data will be dithered to aid in cosmic ray removal and appropriate FLASH parameters will be specified to (partially) mitigate charge transfer inefficiencies. In addition to duplicating the earlier mosaics, we also request a full mosaic with a second medium continuum band in the red using F763M. This new filter provides a second clean synchrotron map which, in conjunction with the JWST NIR/MIR continuum exposures, will permit a spatial study of spectral index variations within the synchrotron emission. We use 5 orbits per field to provide data that go at least as deep as the WFPC2 data (assuming 2x2 binning of the resultant data) plus obtain the additional F763M data. For the six fields of the mosaic then, we need 30 orbits. Because of the kinematics and filter widths of the various `Halpha' filters in WFC3 and/or the WFPC2 existing data, Halpha emission is hopelessly blended with one or both of the [N II] lines (6548, 6583). We thus request two central WFC3 fields using the F487N filter to obtain clean, current epoch, high spatial resolution hydrogen line (Hbet$) images of the bright interior filaments. A clean hydrogen image will permit abundances with respect to hydrogen to be mapped out in the finest available spatial scales. Our proposed fields also include the majority of a single WFPC2 field that was observed with a comparable Hbeta filter with WFPC2, as well as covering two existing JWST Cy 1 MIRI MRS locations. However, Hbeta is a weaker line and is in the blue where HST response is somewhat lower, so the exposure time required is significantly longer than for the other filters. To obtain S/N comparable to the other emission lines will require 3 additional orbits per field, or 6 orbits total. This makes the full proposal 36 orbits. A word on orientation: The Crab Nebula is at quite low ecliptic latitude and so available angles are limited. There is real benefit to our analysis if, once the program is started at a given orientation, the remaining fields are done at the sme orientation (modulo 180 degrees if necessary). This includes the two Hbeta fields; while these are not aligned specifically with the other mosaic field positions, having the orientation the same will remove the concern that orientation corrections would induce into the abundance analysis. Final (231207): This version has angle fixed to 87 degrees and several field positions were tweaked slightly to account for expansion since the DSS images were obtained. Dr. William Blair is an expert in studies of gaseous nebulae and the interstellar medium. He has studied supernova remnants in our galaxy as well as nearby galaxies for decades, using both ground and space-based instrumentation for imaging and spectroscopy across the EM spectrum. Blair led a publication in 1997 that analyzed some of the first HST emission line imaging of the Crab. He is a co-I on the cycle 1 JWST proposal for the Crab. Dr. Tea Temim is an expert on the Crab Nebula as well as many other plerionic supernova remnants, applying multiwavelength observations (X-ray, optical, infrared) and modeling to understand the objects and their environments. She is leading the JWST Cy 1 proposal on the Crab. Dr. Ravi Sankrit has a long history of making and interpretting multiwavelength observations of supernova remnants. His thesis work included the analysis of early HST/WFPC2 observations of the Crab Nebula, and he was a key player in the ca 2000 Crab Nebula WFPC2 mosaic project published by Loll et al. (2013). He is a co-I on the cycle 1 JWST proposal for the Crab. Dr. Martin Laming is a premier modeler of complex plasmas like those found in the Crab Nebula. He has developed codes for simulating the ionization evolution of shocked gas, and the photoionization-recombination equilibrium of unshocked ejecta, illuminated by photons described by various spectral models. He will be a key player in interpreting these data. He is a co-I on the cycle 1 JWST proposal for the Crab. Dr. Pat Slane is an expert on interpretting the multiwavelength characteristics of supernova remnants, young neutron stars, and pulsar wind nebulae, in particular having published many articles involving Chandra observations of such objects. He has conducted a multitude of studies on the evolutionary states of remnants, the acceleration of cosmic rays by supernova remnants shocks, the ionization and temperature equilibrium properties of shocked plasmas in remnants, and the determination of ejecta abundances for comparison with nucleosynthesis models. He is a co-I on the cycle 1 JWST proposal for the Crab. Prof. Dan Milisavljevic is an expert in multiwavelength observations and interpretations of supernovae and supernova remnants. He is involved with ongoing investigations of the Crab Nebula based on hyperspectral cubes being obtained with the SITELLE instrument on CFHT, which will be key to unraveling abundance and ionization effects in the proposed WFC3 data. He is a co-I on the cycle 1 JWST proposal for the Crab. Overall, this team brings the requisite expertise and experience necessary to successfully carry out this proposal. Stellar Populations and the Interstellar Medium 6 false false false false false false true false false false false false SUPPORTED ISM SNR This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 ISM SNR This object was generated by the targetselector and retrieved from the SIMBAD database. 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J2000 J2000 ISM SNR J2000 J2000 ISM SNR J2000 J2000 WFC3/UVIS Imaging No No F547M WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F631N WFC3/UVIS Imaging No No F673N WFC3/UVIS Imaging No No F763M WFC3/UVIS Imaging No No F547M WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F631N WFC3/UVIS Imaging No No F673N WFC3/UVIS Imaging No No F763M WFC3/UVIS Imaging No No F547M WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F631N WFC3/UVIS Imaging No No F673N WFC3/UVIS Imaging No No F763M WFC3/UVIS Imaging No No F547M WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F631N WFC3/UVIS Imaging No No F673N WFC3/UVIS Imaging No No F763M WFC3/UVIS Imaging No No F547M WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F631N WFC3/UVIS Imaging No No F673N WFC3/UVIS Imaging No No F763M WFC3/UVIS Imaging No No F547M WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F631N WFC3/UVIS Imaging No No F673N WFC3/UVIS Imaging No No F763M WFC3/UVIS Imaging No No F487N WFC3/UVIS Imaging No No F487N POS-TARG DITHER 2.414 LINE false false 2 85.759 WFC3-UVIS-DITHER-LINE 1 false POS-TARG DITHER 2.414 LINE false false 3 85.759 WFC3-UVIS-DITHER-LINE-3PT 2 false Hst Same orient constraint links visits (01 02 03 04 05 06 07 08) The scheduling data was generated by CASM 32.0. CASM was run in Phase II mode. 1708587008000 87.0 (Tic-Visit :proposal-id 17500 :visit-id "01" :proposal-version -1 :trans-version "20231220" :date "05-Mar-2024 12:42:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3753696 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17500 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17500 :visit-id "01" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2753 :al-overhead-at-end 125 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "01" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2746 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "01" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2747 :al-overhead-at-end 125 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "01" :orbit-number 4 :pcs-time 392 :si-vis-utilization 2746 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "01" :orbit-number 5 :pcs-time 392 :si-vis-utilization 2747 :al-overhead-at-end 127 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) true 5 0 Hst Same orient constraint links visits (01 02 03 04 05 06 07 08) The scheduling data was generated by CASM 32.0. CASM was run in Phase II mode. 1708666723000 87.0 (Tic-Visit :proposal-id 17500 :visit-id "02" :proposal-version -1 :trans-version "20231220" :date "05-Mar-2024 12:42:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3753696 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17500 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17500 :visit-id "02" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2753 :al-overhead-at-end 125 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "02" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2746 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "02" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2745 :al-overhead-at-end 125 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "02" :orbit-number 4 :pcs-time 392 :si-vis-utilization 2744 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "02" :orbit-number 5 :pcs-time 392 :si-vis-utilization 2747 :al-overhead-at-end 127 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) true 5 0 Hst Same orient constraint links visits (01 02 03 04 05 06 07 08) The scheduling data was generated by CASM 32.0. CASM was run in Phase II mode. 1708848930000 87.0 (Tic-Visit :proposal-id 17500 :visit-id "03" :proposal-version -1 :trans-version "20230922" :date "07-Dec-2023 15:22:46.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3753696 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17500 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17500 :visit-id "03" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2753 :al-overhead-at-end 125 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "03" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2746 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "03" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2745 :al-overhead-at-end 125 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "03" :orbit-number 4 :pcs-time 392 :si-vis-utilization 2744 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "03" :orbit-number 5 :pcs-time 392 :si-vis-utilization 2747 :al-overhead-at-end 127 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) true 5 0 Hst Same orient constraint links visits (01 02 03 04 05 06 07 08) The scheduling data was generated by CASM 32.0. CASM was run in Phase II mode. 1709008313000 87.0 (Tic-Visit :proposal-id 17500 :visit-id "04" :proposal-version -1 :trans-version "20230922" :date "07-Dec-2023 15:22:48.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3753696 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17500 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17500 :visit-id "04" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2753 :al-overhead-at-end 125 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "04" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2746 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "04" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2745 :al-overhead-at-end 125 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "04" :orbit-number 4 :pcs-time 392 :si-vis-utilization 2744 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "04" :orbit-number 5 :pcs-time 392 :si-vis-utilization 2747 :al-overhead-at-end 127 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) true 5 0 Hst Same orient constraint links visits (01 02 03 04 05 06 07 08) The scheduling data was generated by CASM 32.0. 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CASM was run in Phase II mode. 1708165671000 87.0 (Tic-Visit :proposal-id 17500 :visit-id "07" :proposal-version -1 :trans-version "20230922" :date "07-Dec-2023 15:22:52.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1732464 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17500 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17500 :visit-id "07" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2755 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "07" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2747 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "07" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2747 :al-overhead-at-end 127 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) true 3 0 Hst Same orient constraint links visits (01 02 03 04 05 06 07 08) The scheduling data was generated by CASM 32.0. CASM was run in Phase II mode. 1707989149000 87.0 (Tic-Visit :proposal-id 17500 :visit-id "08" :proposal-version -1 :trans-version "20230922" :date "07-Dec-2023 15:22:53.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1732464 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17500 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17500 :visit-id "08" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2755 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "08" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2747 :al-overhead-at-end 127 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17500 :visit-id "08" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2747 :al-overhead-at-end 127 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 32.0. CASM was run in Phase II mode. 1712538430000 87.0 (Tic-Visit :proposal-id 17500 :visit-id "09" :proposal-version -1 :trans-version "20231220" :date "05-Mar-2024 12:04:17.0" :trans-errors '(:WARNINGS 0 :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17500 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17500 :visit-id "09" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2753 :al-overhead-at-end 125 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) true 1 0 Re-do of visit 1 Exp. 1 (see HOPR 92765) Re-do of visit 1 Exp. 2 (see HOPR 92765) /private/var/folders/8t/mg1bkfyj20xf2vfc_9vyhfs80006z1/T/OPVisit17172627844060369117.xml Repeat of failed visit 09. (Tic-Visit :proposal-id 17500 :visit-id "11" :proposal-version -1 :trans-version "20240604" :date "14-Jun-2024 12:15:47.0" :trans-errors '(:WARNINGS 0 :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17500 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17500 :visit-id "11" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2645 :al-overhead-at-end 125 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) true 1 0 Re-do of visit 1 Exp. 1 (see HOPR 92765) Re-do of visit 1 Exp. 2 (see HOPR 92765) The scheduling data was generated by CASM 32.0. CASM was run in Phase II mode. 1712544121000 87.0 (Tic-Visit :proposal-id 17500 :visit-id "10" :proposal-version -1 :trans-version "20231220" :date "05-Mar-2024 12:04:18.0" :trans-errors '(:WARNINGS 0 :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 866240 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17500 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17500 :visit-id "10" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2756 :al-overhead-at-end 123 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3139 :pcs-gap 0 ) true 1 0 Re-do of visit 2 Exp. 1 (see HOPR 92765). Pattern changes to make three dithers and use the full orbit.