Geopotential harmonics of order 15 and 30, derived from the orbital resonances of 25 satellites |
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| Institution: | 1. Department of Earth, Environment and Life Sciences - DISTAV University of Genoa, Italy;2. School of Geography, Earth and Atmospheric Sciences University of Melbourne, Australia;3. Oregon State University, Corvallis, USA;1. Institute of Earth Sciences, University of Silesia in Katowice, Będzińska 60, 41-200 Sosnowiec, Poland;2. Institute of Geophysics, Polish Academy of Sciences, Księcia Janusza 64, 01-452 Warszawa, Poland;3. AGICO Ltd., Purkynova 3050/99a, 612 00 Brno, Czech Republic;4. Institute of Geology, Academy of Sciences of Czech Republic, Rozvojová 135, 165 00 Prague, Czech Republic;1. State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau 999078, China;2. State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China;3. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;4. Center for Excellence in Comparative Planetology, Chinese Academy of Sciences, Hefei 230026, China;5. Institut de Recherche en Astrophysique et Planétologie, Université de Toulouse, CNRS, UPS, CNES, UT3, Toulouse 44346, France;6. Earth Sciences, University College London, London WC1E 6BT, UK;7. State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China;8. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;9. School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454003, China |
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| Abstract: | The recent accurate analysis of the satellite 1965-14A at 15th-order resonance has allowed significantly improved solutions to be derived for the individual harmonic coefficients in the geopotential of order 15 and 30. For order 15, coefficients of degree 15–36 have been evaluated (Tables 3 and 5); for degree 15–23, the mean accuracy is equivalent to 0.6 cm in geoid height; but the accuracy is poorer for degree 24–36, averaging 2.4 cm. For order 30, only the coefficients of even degree, from 30 to 40, have been evaluated (Table 8): for degree 30 and 32 the accuracy is equivalent to 1 cm in geoid height, but deteriorates to 2 cm for higher degree. The accuracies for 15th order, though in need of improvement for high degree, are better than tl ose available for any other order, and are already of the standard required for achieving in the 1990s the very difficult goal of a comprehensive geoid accurate to 10cm. |
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