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Global shape estimates and GIS cartography of Io and Enceladus using new control point network

Nadezhdina, I. und Patraty, V. und Shishkina, L. und Zhukov, D. und Zubarev, A. und Karachevtseva, I. und Oberst, J. (2012) Global shape estimates and GIS cartography of Io and Enceladus using new control point network. In: EGU General Assembly 2012, Seite 11210. COPERNICUS. EGU General Assembly 2012, 22-27 April, 2012, Vienna, Austria.

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Offizielle URL: http://adsabs.harvard.edu/abs/2012EGUGA..1411210N

Kurzfassung

We have analyzed a total of 53 Galileo and Voyager images of Io and 54 Cassini images of Enceladus to derive new geodetic control point networks for the two satellites. In order to derive the network for Io we used a subset of 66 images from those used in previous control point network studies [1, 2]. Additionally we have carried out new point measurements. We used recently reconstructed Galileo spacecraft trajectory data, supplied by the spacecraft navigation team of JPL. A total of 1956 tie point measurements for Io and 4392 ones for Enceladus have been carried out, which were processed by performing photogrammetric bundle block adjustments. Measurements and block adjustments were performed by means of the «PHOTOMOD» software [3] which was especially adapted for this study to accommodate global networks of small bodies, such as Io and Enceladus. As a result, two catalogs with the Cartesian three-dimensional coordinates of 197 and 351 control points were obtained for Io and Enceladus, respectively. The control points for Io have a mean overall accuracy of 4985.7 m (RMS). The individual accuracy of the control points for Enceladus differ substantially over the surface (the range is from 0.1 to 36.0 km) because images lack coverage and resolutions. We also determine best-fit spheres, spheroids, and tri-axial ellipsoids. The centers of the models were found to be shifted from the coordinate system origin attesting to possible errors in the ephemeris of Io. Conclusion and Future work: A comparison of our results for Io with the most recent control point network analysis [2] has revealed that we managed to derive the same accuracy of the control points using a smaller number of images and measurements (This study: 1956 measurements, DLR study: 4392). This probably attests to the fact that the now available new navigation data are internally more consistent. At present an analysis of the data is in progress. We report that control point measurements and global network analysis for small planetary bodies by means of the software «PHOTOMOD» is fast and efficient. Using the new control points and shape models of the satellites we are currently preparing new maps of Io and Enceladus using GIS tools. For parts of the surface for which we have quality stereo-images we will produce DEMs and orthoimages, which will be shown at the conference. Acknowledgments: This research was funded by the Ministry of Education and Science of the Russian Federation (MEGA-GRANT, Project name: "Geodesy, cartography and the study of planets and satellites", contract No. 11.G34.31.0021).

elib-URL des Eintrags:https://elib.dlr.de/80782/
Dokumentart:Konferenzbeitrag (NICHT SPEZIFIZIERT)
Titel:Global shape estimates and GIS cartography of Io and Enceladus using new control point network
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Nadezhdina, I.Moscow State University of Geodesy and Cartography (MIIGAiK), MIIGAiK Extraterrestrial Laboratory (MExLab), MOSCOW, Russian FederationNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Patraty, V.Moscow State University of Geodesy and Cartography (MIIGAiK), MIIGAiK Extraterrestrial Laboratory (MExLab), MOSCOW, Russian FederationNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Shishkina, L.Moscow State University of Geodesy and Cartography (MIIGAiK), MIIGAiK Extraterrestrial Laboratory (MExLab), MOSCOW, Russian FederationNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Zhukov, D.Moscow State University of Geodesy and Cartography (MIIGAiK), MIIGAiK Extraterrestrial Laboratory (MExLab), MOSCOW, Russian FederationNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Zubarev, A.Moscow State University of Geodesy and Cartography (MIIGAiK), MIIGAiK Extraterrestrial Laboratory (MExLab), MOSCOW, Russian FederationNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Karachevtseva, I.Moscow State University of Geodesy and Cartography (MIIGAiK), MIIGAiK Extraterrestrial Laboratory (MExLab), MOSCOW, Russian FederationNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Oberst, J.Juergen.Oberst (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:April 2012
Erschienen in:EGU General Assembly 2012
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seite 11210
Verlag:COPERNICUS
Status:veröffentlicht
Stichwörter:Global shape estimates, GIS cartography, Io, Enceladus, control point network
Veranstaltungstitel:EGU General Assembly 2012
Veranstaltungsort:Vienna, Austria
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:22-27 April, 2012
Veranstalter :European Geosciences Union
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erforschung des Weltraums
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):R - Exploration des Sonnensystems
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Planetengeodäsie
Hinterlegt von: Beisembin, Bauyrzhan
Hinterlegt am:21 Jan 2013 09:27
Letzte Änderung:21 Jan 2013 09:27

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