Bulletin Géodésique (1946-1975)

, Volume 115, Issue 1, pp 35–40 | Cite as

Processing of altimetry data

  • Karl-Rudolf Koch


Two methods are discussed for the processing of altimetry data. For the first method it is assumed that the altimetry data, may be analyzed independent of the orbit computation for the satellite that carries the altimeter. Because of the high accuracy of the altimetry data, which can only be fully utilized if it is also introduced into the orbit computations, the second method deals with a simultaneous processing of altimetry data, orbit tracking, and gravity anomalies for the continents. To represent the gravity field, the potential of a simple layer is chosen whose unknown density is assumed to be constant over surface elements into which the surface of the earth is divided. Depending on the accuracy and the amount of the altimetry data, the surface elements for the density values are chosen smaller or larger, so that a very flexible representation of the earth’s gravity field is obtained. Because of the amount and the resolution of the altimetry data a large number of density values have to be determined in a least squares adjustment. To facilitate the computations, buffer zones are introduced so that the large system of normal equations can be broken up into small independent subsystems.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. K. ARNOLD (1972): Das Geoid aus Beobachtungen der Satellitenaltimetrie. Veröfftl. Zentralinst. Physik der Erde, Nr. 7, Potsdam.Google Scholar
  2. W. BENNING (1974): Auswertung von Altimetermessungen für das Modell der einfachen Schicht des Erdschwerefeldes in der Satellitengeodäsie. Deutsche Geodätische Kommission, Reihe C. Nr. 200 München.Google Scholar
  3. B.H. CHOVITZ (1972): Refinement of the Geoid from GEOS-C Data. In NOAA Technical Report ERL 228-AOML 7, p. 2–1, U.S. Department of Commerce, Washington.Google Scholar
  4. B.H. CHOVITZ (1974): Determination of Density of a Simple Layer Directly from Geoid Heights. Journal of Geophysical Research, vol. 79, p. 3026.CrossRefGoogle Scholar
  5. H. FRÖHLICH and K.-R. KOCH (1974): Integrationsfehler in den Variationsgleichungen für das Modell der einfachen Schicht in der Satellitengeodäsie. Mitt. Inst. für Theoretische Geodäsie d. Univ. Bonn, Nr. 26, Bonn.Google Scholar
  6. J.F. ISNER (1972): Determination of Surface Densities from a Combination of Gravimetry and Satellite Altimetry. Department of Geodetic Science, Report No. 186, Colombus.Google Scholar
  7. K.-R. KOCH (1970 a): Gravity Anomalies for Ocean Areas from Satellite Altimetry. In Marine Geodesy, p. 301, Marine Technology Society, Washington.Google Scholar
  8. K.-R. KOCH (1970 b): Gravity Values for Continental Shelf Areas from Satellite Altimetry. In report on the Symposium on Coastal Geodesy, p. 567. Inst. Astronom. and Physical Geodesy of the Technical University, Munich.Google Scholar
  9. K.-R. KOCH (1974): Earth’s Gravity Field and Station Coordinates from Doppler Data, Satellite Triangulation, and Gravity Anomalies. NOAA Technical Report NOS 62, U.S. Department of Commerce, Rockville.Google Scholar
  10. J. B. OAKES (1972): GEOS-C Radar Altimeter Characteristics. In NOAA Technical Report ERL 228-AOML 7, p. 18–1, U.S. Department of Commerce, Washington.Google Scholar
  11. R.P. TEWARSON (1973): Sparse Matrices. Academic Press, New York, LondonGoogle Scholar

Copyright information

© Bureau Central de L’Association Internationale de Géodésie 1975

Authors and Affiliations

  • Karl-Rudolf Koch
    • 1
  1. 1.University of BonnBonnGermany

Personalised recommendations