International Association of Geodesy's 
Special Study Group 3.177

SYNTHETIC MODELLING OF THE EARTH'S GRAVITY FIELD
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Downloadable Synthetic Gravity Fields




PRECOMPUTED SYNTHETIC FIELDS

NEW    Curtin Synthetic Earth Gravity Field Model (Curtin SEGM) Version 1
This is a synthetic Earth garvity field model based on forward gravity field modelling only (Topography, Bathymetry, Crust and Mantle)
Self-consistent synthetic gravity anomalies, geoid heights and vertical deflections (at the geoid) over Australia.

These are on a 2' by 2' grid (degree 5400) between the geographic bounds (108E-160E, 8S-45S). A detailed technical description of the construction of these fields will appear soon. It is similar to that used for the study by Novak et al. (PDF download). The format of each of these files is an array. This array can be converted to the format of geocentric geodetic longitude, geocentric latitude and quantity using the FORTRAN77 program sid2gmt.f.
  • ausga.zip gravity anomalies at the geoid.
  • ausn.zip geoid heights.
  • ausew.zip east-west vertical deflections at the geoid.
  • ausns.zip north-south vertical deflections at the geoid.

    • [To download, simply click the right mouse button and choose 'save as', or click the left mouse button and most web browsers should automatically prompt you to save the file. If you have problems downloading this file, contact Will Featherstone]
    Self-consistent synthetic gravity anomalies, geoid heights and vertical deflections (at the geoid) over Greece.

    These are on a 5' by 5' grid between the geographic bounds (18E-30E, 34N-42N). A detailed technical description of the construction of these fields will appear soon. It is similar to that used for the study by Novak et al. (PDF download). The format of each of these files is an array. This array can be converted to the format of geocentric geodetic longitude, geocentric latitude and quantity using the FORTRAN77 program sid2gmt.f.
  • grga.zip gravity anomalies at the geoid.
  • grn.zip geoid heights.
  • grew.zip east-west vertical deflections at the geoid.
  • grns.zip north-south vertical deflections at the geoid.

    • [To download, simply click the right mouse button and choose 'save as', or click the left mouse button and most web browsers should automatically prompt you to save the file. If you have problems downloading this file, contact Will Featherstone]
    Roger Haagmans's synthetic gravity field. For a description of this model, see the paper published in the Journal of Geodesy PDF format . To request this model, please contact the author directly roger.haagmans@ikf.nlh.no
     SOFTWARE TO COMPUTE YOUR OWN SYNTHETIC FIELDS

    NOTE This is research-only software, so comes with no manuals nor warranties whatsoever. It cannot be used for commercial purposes.

    HARMEXG.F

    A FORTRAN77 program to generate point values of the gravity field, with the inclusion of random noise. See this web-site for a description of this synthetic gravity field model.
    Ruediger Lehmann's MATLAB (v 4.2 or later) script files.

    A description of these files is given in the PDF document.
    axi.zip contains the MATLAB script files and the technical paper
    [To download, simply click the right mouse button and choose 'save as', or click the left mouse button and most web browsers should automatically prompt you to save the file. If you have problems downloading this file, contact Will Featherstone]
    Simon Holmes's synthetic gravity field program.

    This FORTRAN77 program was used to construct the above synthetic fields over Australia and Greece. To request this software, please contact the author directly holmes@vesta.curtin.edu.au      
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    This page is maintained by Professor Will Featherstone and Dr.-Ing. Michael Kuhn. It was last modified on the 19th of October, 2002.
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