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Detection of Earth impact craters aided by the detailed global gravitational model EGM2008
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SYSNO ASEP 0354962 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Detection of Earth impact craters aided by the detailed global gravitational model EGM2008 Author(s) Klokočník, Jaroslav (ASU-R) RID, ORCID
Kostelecký, J. (CZ)
Novák, P. (CZ)
Wagner, C. A. (US)Source Title Acta geodynamica et geomaterialia. - : Ústav struktury a mechaniky hornin AV ČR, v. v. i. - ISSN 1214-9705
Roč. 7, č. 1 (2010), s. 71-97Number of pages 27 s. Language eng - English Country CZ - Czech Republic Keywords global gravitational model ; gravity anomaly ; impact craters on the Earth Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics R&D Projects LC506 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10030501 - ASU-R (2005-2011) UT WOS 000277686900008 Annotation We have surveyed the Earth's surface using gravity anomalies and second-order radial derivatives of the disturbing gravitational potential computed from the gravitational model EGM2008 complete to degree and order 2159 (for selected degrees up to 2190). It corresponds to 5 arcmin resolution on the ground. Over most well known impact crater sites on the Earth we found the second-order derivatives (not available from ordinary gravity surveys) offered finer discrimination of circular features than the gravity anomalies themselves. We also discovered that some of the sites show evidence of double or multiple craters which will need further ground verification. Some of these signatures (in hilly or mountainous terrain) may also need to be corrected for the gravitational effect of topography to sharpen their hidden features. Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2011
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