PIXELS. For the People: HiRISE Data Products

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1 For the People: HiRISE Data Products Alfred McEwen, Rod Heyd, Sarah Sutton, Ari Espinosa, Audrey Fennema, Rich Leis, Guy McArthur, Chris Schaller, Matt Chojnacki, Laz Kestay, Kris Becker, Randy Kirk, Eric Eliason LPL, University of Arizona; USGS, Flagstaff PIXELS HiRISE ESP_014339_0930 South Pole residual CO 2 ice cap in mid-summer 1

2 HiRISE Pushbroom Imaging High Resolution Imaging Science Experiment Alfred McEwen, Principal Investigator S/C orbital motion pushes sensor projection across ground HiRISE FPA 20,000 pixels (non-overlap) in Cross-Track direction Line integration timing is matched to orbital ground speed (~3.4 km/s) 2048 x128 TDI Line Arrays Color Filters suspended above each detector Flexible band tuning Multiple colors Color Swath Width Altitude varies with latitude and topography, ~ km 50 cm aperture, F/24 (HiRISE Optical System) cm/pixel Sensor (linear array of pixels) integrates during motion of single pixel: ~ second! Add 128 lines to build up signal Image Length Sub-satellite (nadir) velocity IFOV = 1.0 µrad FOV = 1.15 degrees (20K pixels) Swath Width Sub-satellite (nadir) velocity direction HiRISE instrument designed and built at Ball Aerospace, Boulder CO, and flown on MRO spacecraft built by Lockheed-Martin in Littleton, CO. 2

3 HiRISE Stereo Data Acquisition Must point spacecraft to the side on 2 different orbits Produce 1-m scale Digital Terrain Models! Home Plate Left: DTM of part of Columbia Hills, explored by Spirit rover 3

4 HiRISE Images with color stripe and fullres sample 4

5 HiRISE at Mars: March 18, ,214 Mars images returned TB in PDS 29,474 Giga-pixels Covers 2.49% of Martian surface Covers ~0.5% in color >4,598 stereo pairs completed ~0.4% of Mars covered in stereo 301 DTMs released to PDS ESP_026412_2035 Impact ejecta in Nili Fossae regi 5

6 HiRISE: The People s Camera Who are The People? General Public Mars science community HiRISE has broken new ground in serving the science community Image suggestion site /uahirise.org/hiwish Produce useful high-level data products Release of data products to PDS every month 1-2 months after acquisition Use of JPEG2000 Release of analysis tools 6

7 >1000 HiRISE Papers! NASA ADS full-text search of refereed papers end of 2015 with HiRISE in main text: 1082 publications >70% of papers by non-mro authors 7

8 HiRISE Data Products Raw data (Experiment Data Records or EDRs) Calibrated and map-projected images (Reduced Data Records or RDRs) Digital Terrain Models (DTMs), plus associated products Orthoimages Stereo anaglyphs Color altimetry and shaded relief Figure of Merit maps Extra data products Nomap images raw geometry, highest resolution Red and color Merged IRB and RGB map-projected color IRB = IR, RED, BG images displayed as R-G-B RGB = RED, BG, synthetic blue displayed as R-G-B Browse images 2048 pixels wide 8

9 Automated pipelines that work reliably are key to rapid release of data products HiRISE pipelines use ISIS 9

10 EDRs and NoMap products EDRs are up to 28 narrow image strips (2 per CCD) NoMap: radiometric cal plus stitch strips into single image in raw geometry 10

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12 See Poster Thursday evening! 12

13 DTMs released to PDS 13

14 Correcting Geometric Distortions from Pointing Jitter Coregistration data from all nine of the overlapping RED CCD pairs in HiRISE PSP_007124_1765 plotted from before jitter removal (red) and after jitter removal (blue). Sample and line offsets are measured in pixels and plotted against the image time in seconds. Data points are extracted every 50 lines. The high-frequency distortions have been removed by the jitter correction algorithm, except near the very ends of the image. The average offset of each CCD pair is preserved, and is a function of the camera geometry. See McEwen et al., 2010; Sutton et al., paper in preparation. 14

15 DTM Mosaics 15

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17 Software tools at /uahirise.org HiView fast browse/zoom, stretch, and measurements JPEG2000 PDS_JP2 file conversion AutoTriangulation 17

18 Orthoimage Series for Change Detection 18

19 Largest new gully channel seen 19

20 Campaigns for Landing Sites Phoenix Mission ( ) MSL (Curiosity rover) campaign led to selection of Gale crater ( ) Current campaigns: 2016 ExoMars EDM 2018 InSight lander 2018 (or 2020) ExoMars rover 2020 NASA rover Future: Human landing sites and exploration zones TBD 20

21 HiRISE Data Product Wish List Produce high-quality DTMs for all stereo pairs 4500 vs 300 PDS archival HiPrecision geometric corrections to all images that need it Normalized surface color/albedo products Local mosaics FFT processing to remove patterned noise Also can sharpen some images 21

22 Summary: HiRISE, The People s Camera MRO and HiRISE may return data for another decade We should make more and better data products supporting another 1,000 publications and future landing sites Remember to smell the DTMs! 22