The Europa Imaging System (EIS) Investigation.

Autor: Turtle EP; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., McEwen AS; University of Arizona, Tucson, AZ USA., Patterson GW; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Ernst CM; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Elder CM; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA USA., Slack KA; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA.; NASA Goddard Space Flight Center, Greenbelt, MD USA., Hawkins SE; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., McDermott J; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Meyer H; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., DeMajistre R; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Espiritu R; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Seifert H; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Niewola J; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Bland M; U.S. Geological Survey (USGS), Flagstaff, AZ USA., Becker M; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Centurelli J; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Collins GC; Wheaton College, Norton, MA USA., Corlies P; Massachusetts Institute of Technology, Cambridge, MA USA., Darlington H; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Daubar IJ; Brown University, Providence, RI USA., Derr C; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Detelich C; Cornell University, Ithaca, NY USA., Donald E; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA.; Main Engineering, Silver Spring, MD USA., Edens W; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Fletcher L; University of Leicester, Leicester, UK., Gardner C; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Graham F; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Hansen CJ; Planetary Science Institute, Tucson, AZ USA., Haslebacher C; University of Bern, Bern, Switzerland., Hayes AG; Cornell University, Ithaca, NY USA., Humm D; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Hurford TA; NASA Goddard Space Flight Center, Greenbelt, MD USA., Kirk RL; U.S. Geological Survey (USGS), Flagstaff, AZ USA., Kutsop N; Cornell University, Ithaca, NY USA., Lees WJ; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Lewis D; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., London S; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Magner A; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Mills M; University of Arizona, Tucson, AZ USA., Barr Mlinar AC; Planetary Science Institute, Tucson, AZ USA., Morgan F; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Nimmo F; University of California, Santa Cruz, CA USA., Ocasio Milanes A; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Osterman S; Southwest Research Institute, Boulder, CO USA., Phillips CB; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA USA., Pommerol A; University of Bern, Bern, Switzerland., Prockter L; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Quick LC; NASA Goddard Space Flight Center, Greenbelt, MD USA., Robbins G; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Soderblom JM; Massachusetts Institute of Technology, Cambridge, MA USA., Stewart B; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Stickle A; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA., Sutton SS; University of Arizona, Tucson, AZ USA., Thomas N; University of Bern, Bern, Switzerland., Torres I; Massachusetts Institute of Technology, Cambridge, MA USA., Tucker OJ; NASA Goddard Space Flight Center, Greenbelt, MD USA., Van Auken RB; Johns Hopkins Applied Physics Laboratory, Laurel, MD USA.; University of Arizona, Tucson, AZ USA., Wilk KA; NASA Goddard Space Flight Center, Greenbelt, MD USA.; Brown University, Providence, RI USA.
Jazyk: angličtina
Zdroj: Space science reviews [Space Sci Rev] 2024; Vol. 220 (8), pp. 91. Date of Electronic Publication: 2024 Dec 04.
DOI: 10.1007/s11214-024-01115-9
Abstrakt: The Europa Imaging System (EIS) consists of a Narrow-Angle Camera (NAC) and a Wide-Angle Camera (WAC) that are designed to work together to address high-priority science objectives regarding Europa's geology, composition, and the nature of its ice shell. EIS accommodates variable geometry and illumination during rapid, low-altitude flybys with both framing and pushbroom imaging capability using rapid-readout, 8-megapixel (4k × 2k) detectors. Color observations are acquired using pushbroom imaging with up to six broadband filters. The data processing units (DPUs) perform digital time delay integration (TDI) to enhance signal-to-noise ratios and use readout strategies to measure and correct spacecraft jitter. The NAC has a 2.3° × 1.2° field of view (FOV) with a 10-μrad instantaneous FOV (IFOV), thus achieving 0.5-m pixel scale over a swath that is 2 km wide and several km long from a range of 50 km. The NAC is mounted on a 2-axis gimbal, ±30° cross- and along-track, that enables independent targeting and near-global (≥90%) mapping of Europa at ≤100-m pixel scale (to date, only ∼15% of Europa has been imaged at ≤900 m/pixel), as well as stereo imaging from as close as 50-km altitude to generate digital terrain models (DTMs) with ≤4-m ground sample distance (GSD) and ≤0.5-m vertical precision. The NAC will also perform observations at long range to search for potential erupting plumes, achieving 10-km pixel scale at a distance of one million kilometers. The WAC has a 48° × 24° FOV with a 218-μrad IFOV, achieving 11-m pixel scale at the center of a 44-km-wide swath from a range of 50 km, and generating DTMs with 32-m GSD and ≤4-m vertical precision. The WAC is designed to acquire three-line pushbroom stereo and color swaths along flyby ground-tracks.
Competing Interests: Competing InterestsThe authors have no competing interests to declare that are relevant to the content of this article.
(© The Author(s) 2024.)
Databáze: MEDLINE
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