Journal of Geodesy

, Volume 74, Issue 7–8, pp 512–518 | Cite as

Tectonic plate motion and co-seismic steps surveyed by DORIS field beacons: the New Hebrides experiment

  • S. Calmant
  • J.-J. Valette
  • J.-F. Crétaux
  • L. Soudarin

Abstract.

 The New Hebrides experiment consisted of setting up a pair of DORIS beacons in remote tropical islands in the southwestern Pacific, between 1993 and 1997. Because of orbitography requirements on TOPEX/Poséidon, the beacons were only transmitting to SPOT satellites. Root-mean-square (RMS) scatters at the centimeter level on the latitude and vertical components were achieved, but 2-cm RMS scatters affected the longitude component. Nevertheless, results of relative velocity (123 mm/year N250°) are very consistent with those obtained using the global positioning system (GPS) (126 mm/yr N246°). The co-seismic step (12 mm N60°) related to the Walpole event (MW = 7.7) is consistent with that derived from GPS (10 mm N30°) or from the centroid moment tensor (CMT) of the quake (12 mm N000°).

Key words: Positioning – DORIS – Plate tectonics – Co-seismic displacements 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • S. Calmant
    • 1
  • J.-J. Valette
    • 2
  • J.-F. Crétaux
    • 3
  • L. Soudarin
    • 2
  1. 1.Laboratoire de Géophysique, Centre IRD, BP A5, Nouméa, New Caledonia e-mail: calmant@noumea.ird.nc; Tel./Fax: (687) 26 07 74NC
  2. 2.CLS, Location Collection Satellites, Toulouse, FranceFR
  3. 3.LEGOS-GRGS/CNES, Toulouse, FranceFR

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