0 Assigned ID: 31 ----- Attempting Submission 1 (Sun Mar 27 04:01:09 GMT 2016) ----- HST Phase I Proposal 31 (HD107146_CY24_SCHNEIDER_MS_V003.apt) successfully submitted. Receipt: # 31-1 ----- Attempting Submission 2 (Sun Apr 03 01:04:38 GMT 2016) ----- HST Phase I Proposal 31 (HD107146_CY24_SCHNEIDER_MS_V004.apt) successfully submitted. Receipt: # 31-2 ----- Attempting Submission 3 (Fri Apr 08 22:31:32 GMT 2016) ----- This is a first submission. All should be correct and complete, EXCEPT we have a request (by email) into our PC to verify our computations of absolute ORIENTATION angle viit level requirements. The basis for those are detailed with illustrations in that email. We wish to have that reviewed, and corrected if needed. 558349311 ----- Attempting Submission 1 (Wed Jun 29 23:46:24 GMT 2016) ----- We propose a 3-cycle GO program utilizing a total of HST 30 orbits to directly measure and map the line-of-sight optical depth through the brightest sector of the HD 107146 solar-analog debris ring by ring-transit differential photometry of a bright (compared to the disk), spatially extended, background galaxy. We will advantageously exploit its serendipitously unique and experiment-enabling high proper motion reflex trajectory w.r.t. the galaxy back-lighting a sectional slice the exoplanetary debris system (EDS) with a 2D grid of multiple sight-lines through the nearly face-on disk over time. These measures (the only opportunity for such in remaining HST lifetime) will uniquely provide unambiguous extinction/optical depth constraints to better elucidate the physical properties of the debris particles in this otherwise well studied EDS. With these and prior data we will: (a) disambiguate inferred particle spatial, size, and mass density distributions otherwise conflated with debris material optical property dependencies, (b) better constrain the posited pathways for planetary debris dust production mechanisms in EDSs (e.g., catastrophic collisions of parent bodies, dust-production cascades, cratering events, etc.) and (c) search for and discriminated between "clumps ", "bumps ", and "clouds" of collisional debris of varying particle (and mass) densities. This investigation was enabled in forethought by mapping the galaxy surface brightness out-of-transit in a comprehensive 2011 precursor study (HST GO/12228) using exactly the same STIS instrumental configuration with multi-roll PSF template subtracted coronagraphy we propose for the upcoming ring transit opportunity. We are imaging the HD 107146 nearly face-on circumstellar debris ring over period of three years (HST Cycles 24 - 26) a it partially transits serendipitously in front of a bright background galaxy. Beginning in late 2016, part of the outer periphery of the debris ring will be back-lit by the galaxy. Debris dust orbiting HD 107146 will partially extinct the galaxy light with variable column depth with stellocentric distance. By appx. 2020, the galaxy will be behind the brightest part of the debris ring (and presumably of highest optical depth) closer to the host star. Baseline out-of-transit observations were obtained in 2011 with HST/STIS PSF-subtracted multi-roll coronagraphy of HD 107146 in GO 12228 and closely follow the same observing strategy here for the now, in-transit, observations. Using a total of 30 HST orbits, we will re-visit and identically image the system six times over a three year period, roughly every six months consuming 5 orbits per transit-phase epoch. At each epoch we will image the HD 107146 debris system+background galaxy in four orbits, with also a contemporaneously observed nearby and color-matched PSF temple calibration star, interleaved in a 5th orbit. Each visit-set of five orbit executes contiguously interrupted only by Earth occultation. Each of the four orbits on the disk+galaxy execute with small spacecraft roll offsets (a "roll dither" about HD 107146 of (-6, -2, +2, +6) deg appx. around nominal roll required to simultaneously better suppress and reject PSF-template subtraction (correlated) image residuals with roll discrimination and build image SNR. The STIS coronagraphic image plane wedges obscure some circum-azimuthal regions around the occulted star, and some other regions along the field "diagonals" with respect to the location of the occulted star are degraded by the unapodized HST diffraction spikes. We therefor MUST place the galaxy on the detector only where it does not fall on any of these regions. These regions are rotationally invariant in the instrument free (SAIF) with a spacecraft rotation reorienting the celestial image. We thus must impose absolute orientation constraints for our roll dithers to image the galaxy only in unaffected annular sectors around the occulted star. There are four sufficiently large annular regions to accommodate the nears roll dithers of utility. These fall in annular sectors to the "right and left" of Wedge A, and between the lower diffraction pikes and the edges of Wedge-A. We do not care which one(s) is/are scheduled for our observations, and we provide multiple absolute orientation angle range to ease schedulability. ABSOLUTE ORIENTATION CONSTRAINTS - NOTES TO OUR PC (1) We have computed the APT ORIENTATION constraints for the middle of each of the four acceptable imaging regions (azimuthal sectors) spoken to above on the basis of: (a) the galaxy Position Angle (PA_gal) w.r.t. the occulted star (this will slowly change over the 3 years of the program), and (b) the angle between the STIS 50CCD U3 Reference that is +45 degrees CCW from the image +Y axis (this, in the SIAF frame, is in the direction of the upper left diffraction spike) and the middle of the annular sector to place the galaxy. We BELIVE these orientations are computed to be used as visit level orientation constraints as: ORIENTATION = PA_galaxy - SECTOR_n_Angle_from_U3_REF (see email sent June 29, 2016 01:50:44 PM MST) We measured and compute as follows with one minor differences for the first and second halves of Cycle 24: 1st half CY 24 -- 10/2016 PA_galaxy = 212.5 deg EofN (r=5.0328") SECTOR_n_Angle_from_U3_REF ORIENTATION CONSTRAINT SECTOR min(deg) max(dec) min(deg) max(dec)8 83 B 8 83 129.5 204.5 C 97 122 90.5 115.5 D 145 169 43.5 67.5 E 189 261 -48.5 (311.5) 23.5 (note zero angle crossing) 2nd half CY 24 -- 04/2017 PA_galaxy = 212.1 deg EofN (r=4.9233") SECTOR_n_Angle_from_U3_REF ORIENTATION CONSTRAINT SECTOR min(deg) max(dec) min(deg) max(dec)8 83 B 9 83 129.1 203.1 C 98 122 90.1 114.1 D 146 169 66.1 43.1 E 189 261 -48.9 (311.1) 23.1 (note zero angle crossing) We ask our PC to verify we have done this correctly so the galaxy is placed "in between" the diffraction spikes and A-wedge obscurations, not superimposed upon them. We are also uncertain about the correctness of min/max orients when there is a zero-degree crossing between min and max as APT does not allow negative mins. We ask our PC to check this. These absolute orientation constraints are placed on visits 04 and 14, and the relative orientation constraints within on visits 01,02,05 and 11,12,15. (2) To ease scheduling opportunities, we then applied near-symmetrical tolerances to the mid-sector ORIENTATIONs, as (min,max) on each orientation that is non-intrusive on the "bad" areas. Each of these allowable absolute orientation ranges is larger than the full (+/-6 degrees at the extrema) extent of the 4-orbit "roll dithers". APT does not allow us to specify where within the (min/max) absolute orientation constraints the roll dithers in relative offset angles would fall other than being constrained somewhere within. However, we VERY strongly prefer the roll-dithered visits to scheduled scheduled so thatat each epoch they are done are done as close to the center (mid point) of the selected allowable roll ranges as possible (i.e., placing the target in the middleof the min max range with roll dither offsets). We understand the can be set up this way with manual scheduling by our PC though is not expressible by APT and we request this. (3) We do not have a preference for which of the four allowable roll ranges are used at any epoch. OTHER NOTES: Each visit, whether disk+galaxy target or PSF template/calibration star begins with a Mode-2 target acquisition exposure, followed by a series of identical WedgeA-1.0 coronagraphic images to fill the visibility period. Exposure times were chosen to optimize the SNR in the region of the ring without image saturation due to incompletely suppressed stellar light as verified in GO 12228. The two 5-orbit visit sets to be executed at different transit-track phases should be scheduled roughly six months apart, though this is a loose constraint +/- ~ 2 months. The additional four 5-orbit visit sets will be provided in separate APT files in Cycles 25 and 26. Extrasolar Planets and Planet Formation 12 false false false false false false SUPPORTED STAR G III-I J2000 J2000 STAR G III-I This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 Timing link suitability includes constraints ([02 After 01 by 0.0 to 0.1 days] [11 After 01 by 120.0 to 240.0 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243741844 Visit 01. HD 107146 (V=7.07, B-V = +0.62). 1st epoch, 1st orbit Absolute Orientation: Within any of the allowable orientation angle ranges specified Relative Orientation: -6 deg ONR (-8 deg w.r.t. visit 04) Relative Timing: This visit (01) should immediately precede visit (02) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "01" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:21.0" :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 38112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2595 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) false 1 0 SNR = 100, V = 7.07, sp = G2V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Timing link suitability includes constraints ([02 After 01 by 0.0 to 0.1 days] [03 After 02 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243744346 Visit 02. HD 107146 (V=7.07, B-V = +0.62). 1st epoch, 2nd orbit Absolute Orientation: Within any of the allowable orientation angle ranges specified Relative Orientation: -2 deg ONR Relative Timing: This visit (02) should immediately follow visit (01) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "02" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:23.0" :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 38112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2595 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) false 1 0 SNR = 100, V = 7.07, sp = G2V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Timing link suitability includes constraints ([03 After 02 by 0.0 to 0.1 days] [04 After 03 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243747457 Visit 03 (HD120066 PSF; V= +6.3). 1st epoch, 3rd orbit Absolute Orientation: Unconstraind Relative Orientation: Unconstrained Relative Timing: This visit (03) should immediately follow visit (02) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "03" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:26.0" :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 75792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2730 :al-overhead-at-end 0 :internal-dur-at-end 382 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3213 :pcs-gap 0 ) false 1 0 SNR = 100, V = 6.30, sp = G0V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Timing link suitability includes constraints ([04 After 03 by 0.0 to 0.1 days] [05 After 04 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243749633 Visit 04. HD 107146 (V=7.07, B-V = +0.62). 1st epoch, 4th orbit Absolute Orientation: Within any of the allowable orientation angle ranges specified Relative Orientation: +2 deg ONR Relative Timing: This visit (04) should immediately follow visit (03) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "04" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:29.0" :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 38112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2595 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) false 1 0 SNR = 100, V = 7.07, sp = G2V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Timing link suitability includes constraints ([05 After 04 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243751915 Visit 05. HD 107146 (V=7.07, B-V = +0.62). 1st epoch, 5th orbit Absolute Orientation: Within any of the allowable orientation angle ranges specified Relative Orientation: +6 deg ONR Relative Timing: This visit (05) should immediately follow visit (04) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "05" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:31.0" :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 38112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2595 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) false 1 0 SNR = 100, V = 7.07, sp = G2V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Timing link suitability includes constraints ([11 After 01 by 120.0 to 240.0 days] [12 After 11 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243753899 Visit 11. HD 107146 (V=7.07, B-V = +0.62). 2nd epoch, 1st orbit Absolute Orientation: Within any of the allowable orientation angle ranges specified Relative Orientation: -6 deg ONR (-8 deg w.r.t. visit 14) Relative Timing: This visit (11) should immediately precede visit (12) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "11" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:33.0" :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 38112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "11" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2595 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) false 1 0 SNR = 100, V = 7.07, sp = G2V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Timing link suitability includes constraints ([12 After 11 by 0.0 to 0.1 days] [13 After 12 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243755980 Visit 12. HD 107146 (V=7.07, B-V = +0.62). 2nd epoch, 2nd orbit Absolute Orientation: Within any of the allowable orientation angle ranges specified Relative Orientation: -2 deg ONR Relative Timing: This visit (12) should immediately follow visit (11) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "12" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:35.0" :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 38112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "12" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2595 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) false 1 0 SNR = 100, V = 7.07, sp = G2V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Timing link suitability includes constraints ([13 After 12 by 0.0 to 0.1 days] [14 After 13 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243758733 Visit 03 (HD120066 PSF; V= +6.3). 2nd epoch, 3rd orbit Absolute Orientation: Unconstraind Relative Orientation: Unconstrained Relative Timing: This visit (13) should immediately follow visit (12) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "13" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:38.0" :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 75792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "13" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2730 :al-overhead-at-end 0 :internal-dur-at-end 382 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3213 :pcs-gap 0 ) false 1 0 SNR = 100, V = 6.30, sp = G0V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Timing link suitability includes constraints ([14 After 13 by 0.0 to 0.1 days] [15 After 14 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243759994 Visit 14. HD 107146 (V=7.07, B-V = +0.62). 2nd epoch, 4th orbit Absolute Orientation: Within any of the allowable orientation angle ranges specified Relative Orientation: +2 deg ONR Relative Timing: This visit (14) should immediately follow visit (13) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "14" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:39.0" :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 38112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "14" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2595 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) false 1 0 SNR = 100, V = 7.07, sp = G2V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011. Timing link suitability includes constraints ([15 After 14 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1467243761201 Visit 15. HD 107146 (V=7.07, B-V = +0.62). 1st epoch, 5th orbit Absolute Orientation: Within any of the allowable orientation angle ranges specified Relative Orientation: +6 deg ONR Relative Timing: This visit (15) should immediately follow visit (14) in back-to-back orbits. (Tic-Visit :proposal-id 14714 :visit-id "15" :proposal-version -1 :trans-version "20160601" :date "29-Jun-2016 16:42:40.0" :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 38112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14714 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14714 :visit-id "15" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2595 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3221 :pcs-gap 0 ) false 1 0 SNR = 100, V = 7.07, sp = G2V, Exptime rounded to nearest 0.1 second Exposure time, detector gain, and subarray region identical to GO 12228 observations in 2011.