Abstract
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.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
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.
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.
DEFFENSE MAPPING AGENCY (DMA) (1987). World Geodetic System 1984. Its definition and relationships with local systems. Report 8350. 2.
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.
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.
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.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1990 Springer-Verlag New York Inc.
About this paper
Cite this paper
Blitzkow, D., Fortes, L.P.S., Godoy, R.A.Z. (1990). Geoidal Map Improvement in Brazil. In: Sünkel, H., Baker, T. (eds) Sea Surface Topography and the Geoid. International Association of Geodesy Symposia, vol 104. Springer, New York, NY. https://doi.org/10.1007/978-1-4684-7098-7_9
Download citation
DOI: https://doi.org/10.1007/978-1-4684-7098-7_9
Publisher Name: Springer, New York, NY
Print ISBN: 978-0-387-97268-8
Online ISBN: 978-1-4684-7098-7
eBook Packages: Springer Book Archive