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A New Enceladus Global Control Network, Image Mosaic, and Updated Pointing Kernels From Cassini’s 13-Year Mission

Bland, M.T. and Becker, T.L. and Edmundson, K.L. and Roatsch, Thomas and Archinal, B. A. and Takir, D. and Patterson, G.W. and Collins, G. and Schenk, P. and Pappalardo, R.T. and Cook, D.A. (2018) A New Enceladus Global Control Network, Image Mosaic, and Updated Pointing Kernels From Cassini’s 13-Year Mission. Earth and Space Science. American Geophysical Union (AGU). DOI: 10.1029/2018EA000399 ISSN 2333-5084

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2018EA000399

Abstract

NASA’s Cassini spacecraft spent 13 years exploring the Saturn system, including 23 targeted flybys of the small, geologically active moon Enceladus. These flybys provided a wealth of image data from Cassini’s Imaging Science Subsystem. To improve the usability of the Enceladus data set, we created a new, global photogrammetric control network for Enceladus that enabled compilation of a versatile cartographic package to support geologic mapping and other investigations. The network used 586 images in four image filters with a pixel scale generally between 50 and 500 m per pixel and a phase angle less than 120° and consisted of 10,362 tie points and 173,704 individual image measures, averaging nearly 17 measures per tie point. Least squares bundle adjustment resulted in a root-mean-square residual of 0.45 pixel, corresponding to root-mean-square ground point uncertainties of 66, 51, and 46 m in latitude, longitude, and radius, respectively. Using our geodetic control network, we created new global image mosaics, coregistered flyby mosaics to support geologic mapping, and updated pointing kernels for every image used in the solution. These products, including the updated pointing kernels, are available to the community through NASA’s Planetary Data System Imaging Annex. The bundle adjustment solution also yielded independently determined shape information, resulting in radii within the stated uncertainty of International Astronomical Union values. The challenges of the data set, and the technical methodology described here are applicable to bodies imaged during multiple flybys with variable viewing and illumination geometry, including other midsized satellites of Saturn, and the Europa Clipper mission.

Item URL in elib:https://elib.dlr.de/122418/
Document Type:Article
Title:A New Enceladus Global Control Network, Image Mosaic, and Updated Pointing Kernels From Cassini’s 13-Year Mission
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bland, M.T.USGS Astrogeology Science CenterUNSPECIFIED
Becker, T.L.United States Geological Survey, Flagstaff, AZ, USAUNSPECIFIED
Edmundson, K.L.Astrogeology Science Center, United States Geological SurveyUNSPECIFIED
Roatsch, ThomasThomas.Roatsch (at) dlr.deUNSPECIFIED
Archinal, B. A.U.S. Geological Survey, Flagstaff, AZ, USAUNSPECIFIED
Takir, D.USGSUNSPECIFIED
Patterson, G.W.Applied Physics Laboratory, Johns Hopkins University, MP3-E169, 11100 Johns Hopkins Road, Laurel, MD 20723, USAUNSPECIFIED
Collins, G.Astron. & Phys. Dept., Wheaton College, Norton, MA 02766UNSPECIFIED
Schenk, P.Lunar and Planetary Institute, 3600 Bay Area Blvd, Houston TX 77058, USAUNSPECIFIED
Pappalardo, R.T.Jet Propulsion Laboratory, California Institute of Technology, M/S 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109, USAUNSPECIFIED
Cook, D.A.USGS Astrogeology Science CenterUNSPECIFIED
Date:2018
Journal or Publication Title:Earth and Space Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1029/2018EA000399
Publisher:American Geophysical Union (AGU)
ISSN:2333-5084
Status:Published
Keywords:Cassini, Enceladus, Cartography
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt DAWN
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Roatsch, Dr.rer.nat. Thomas
Deposited On:29 Oct 2018 10:47
Last Modified:29 Oct 2018 10:47

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