Geoidal Map Improvement in Brazil

  • Denizar Blitzkow
  • Luiz Paulo Souto Fortes
  • René Armando Zepeda Godoy
Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 104)


A very great effort has been done recently by many different organizations in Brazil in order to improve the gravity network. The consequence has been an increasing number of blocks of 10×10 where mean gravity anomaly has been possible to estimate. In the other hand, IBGE has increased the number of Doppler observations in the levelling network and improved the computations of the observations with new programs. This paper presents the situation of mean gravity anomalies now available and the results of the comparison between the Doppler undulations and the recent GEM-T1 model. Finally, a geoidal map using 301 doppler undulations and the spheroidal heights derived from GEM-Tl is presented.


Gravity Anomaly Gravity Data Geoidal Height Geodetic Network Geodetic System 
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  1. BLITZKOW D. and SA N. C. DE (1983). As alturas geoidais Dop-pier e a separaçgo elipsóide-esferóide de referência. Re-vista Brasileira de Geofïsica, 2 (1), pp. 19–24.Google Scholar
  2. BLITZKOW D.; SA N. C. DE AND FORTES L. P. S. (1987). Efforts toward a geoídal chart of Brazil referred to SAD-69. XIXth. General Assembly of IUGG, Vancouver, August 9–22.Google Scholar
  3. DEFFENSE MAPPING AGENCY (DMA) (1987). World Geodetic System 1984. Its definition and relationships with local systems. Report 8350. 2.Google Scholar
  4. FORTES L. P. S. AND BLITZKOW D. (1988). As alturas geoidais Doppler e os modelos de grau elevado do potencial gra- vitacional. Cadernos de Geociências, Fundaçâo IBGE, no. 1,pp: 23–27.Google Scholar
  5. FORTES L. P. S.; CAGNIN I. F.; GODOY R. A. Z. e BLITZKOW D. (1989). Determinaçâo dos pargmetros de transformaçâo en-tre os sistemas NWL-10D, NSWC-9Z2 e o SAD-69. Anais do XIV Congresso Brasileiro de Cartografia, vo1.I,pp: 157–165.Google Scholar
  6. SA N. C. de (1989). Modelos estatisticos e representaçâo integrada do campo de gravidade no Brasil. Doctor Thesis presented to the Department of Geophysics, University of Sâo Paulo.Google Scholar

Copyright information

© Springer-Verlag New York Inc. 1990

Authors and Affiliations

  • Denizar Blitzkow
    • 1
  • Luiz Paulo Souto Fortes
    • 2
  • René Armando Zepeda Godoy
    • 2
  1. 1.IAG - USPSão PauloBrazil
  2. 2.IBGEAv. BrasilRio de JaneiroBrazil

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