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Simulation of the Indonesian land gravity data using a digital terrain model data

Earth, Planets and Space volume 56, pages 15–24 (2004)Cite this article

Abstract

The Indonesian gravity field is neither accurately nor comprehensively determined, especially due to inadequacy of land gravity data. This study deals with determination of Indonesian land gravity and proposes the solution to data unavailability by means of a simulation technique. The simulation was carried out by combining short wavelength topographic effects from GTOPO30 and long wavelength information from EGM96. The simulated result was then compared with the observed gravity data. Over Java, Sumatra and Sulawesi islands, using three methods commonly used on the computation of topographic effect; topography, isostatic and RTM (Residual Terrain Model), it was estimated that error propagation by the GTOPO30 into the simulated gravity is about 4.5 to 11.7 mgal, with the RTM method was affected less than others. It was also shown that the simulated gravity from the RTM method gave the best agreement with STD (Standard Deviation) differences of 17 to 42 mgal compared to the observed data. This result was achieved after applying optimal RTM parameters over the Indonesian area: a reference field of 25′–27.5′ and density of 2–2.2 gr/cm3. Compared to STD differences between EGM96 and observed data, that between the simulated gravity and observed data improved by 2.5–7 mgal, and gave more detailed gravity features, especially over areas of high topography.

References

  • Bajracharya, S., C. Kotsakis, M. G. Sideris, Geoid Determination Using Different Gravity Reduction Techniques, Presented in IAG meeting, Budapest, 2001.

  • Featherstone, W. E., J. F. Kirby, A. H. W. Kearsley, J. R. Gilliland, G. M. Johnston, J. Steed, R. Forsberg, and M. G. Sideris, The AUSGeoid98 geoid model of Australia: data treatment, computations and comparisons with GPS-levelling data, J. Geod., 75-5/6, 313–330, 2001.

    Article  Google Scholar 

  • Forsberg, R., Gravity field terrain effect computation by FFT, Bull. Geod., 59, 342–360, 1985.

    Article  Google Scholar 

  • Getech, South East Asia gravity project, Technical report, Getech, 1995.

  • Heiskanen, W. H. and H. Moritz, Physical Geodesy, Freeman, San Francisco, 1967.

    Google Scholar 

  • Kahar, J., A. Kasenda, and K. Prijatna, The Indonesian Geoid model 1996, in Gravity, geoid and marine geodesy, edited by J. Segawa, H. Fujimori, and S. Okubo, International Association of Geodesy Symposia, 117, pp. 613–620, Springer, Berlin Heidelberg New York, 1997.

    Chapter  Google Scholar 

  • Kearsley, A. H. W. and Z. Ahmad, Problems with geoid evaluation in South East Asia, in Gravity and Geoid, edited by H. Sunkel and I. Marson, International Association of Godesy Symposia, 113, pp. 433–438, Springer, Berlin Heidelberg New york, 1994.

    Google Scholar 

  • Lemoine, F. G., D. E. Smith, L. Kunz, R. Smith, E. C. Palvis, N. K. Palvis, S. M. Klosko, D. S. Chinn, M. H. Torrence, R. G. Williamson, C. M. Cox, K. E. Rachlin, Y. M. Wang, S. C. Kenyon, R. Salman, R. G. Trimmer, R. H. Rapp, S. Nerem, The development of the joint NASA GSFC and DMA joint geopotential model, in Gravity, Geoid and Marine Geodesy, edited by J. Segawa, H. Fujimori, S. Okubo, International Association of Geodesy Symposia, 117, pp. 461–469, Springer, Berlin Heidelberg New york, 1997.

    Chapter  Google Scholar 

  • Omang, O. C. D. and R. Forsberg, How to handle topography in practical geoid determination: three examples, J. Geod., 74-6, 458–466, 2000.

    Article  Google Scholar 

  • Prijatna, K., A strategy for geoid determination in the Indonesian archipelago, DEOS Progress Letters, 1, 101–122, 1998.

    Google Scholar 

  • Tscherning, C. C., R. Forsberg, and P. Knudsen, The GRAVSOFT package for geoid determination, Proc 1st IAG Continental Workshop of the Geoid in Europe, edited by P. Holota and M. Vermeer, 327–334, Prague, 1992.

  • U.S Geological Survey, The GTOPO30 Documentation, Land Processing Distributed Active Center on the WWW (URL: http://edcdaac.usgs.gov/gtopo30/gtopo30.html), 1996.

  • Wessel, P. and W. H. F. Smith, Free Software helps maps and display data, EOS Trans Am Geophys Union, 72: 441, 445–446, 1991.

    Google Scholar 

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Authors and Affiliations

  1. Graduate School of Science, Kyoto University, Kitashirakawa, Oiwake-cho, Kyoto, 606-8502, Japan

    Leni Sophia Heliani, Yoichi Fukuda & Shuzo Takemoto

Authors
  1. Leni Sophia Heliani
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  2. Yoichi Fukuda
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  3. Shuzo Takemoto
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Correspondence to Leni Sophia Heliani.

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Heliani, L.S., Fukuda, Y. & Takemoto, S. Simulation of the Indonesian land gravity data using a digital terrain model data. Earth Planet Sp 56, 15–24 (2004). https://doi.org/10.1186/BF03352487

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  • DOI: https://doi.org/10.1186/BF03352487

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