DORIS
(Doppler Orbitography and Radiopositioning Integrated by Satellite)

DORIS (Doppler Orbitography and Radiopositioning Integrated by Satellite) is a tracking system providing range-rate measurements of signals from a dense network of ground-based beacons. These data are precision processed on ground providing the satellite orbit with an accuracy of the order of centimetres.
They are also processed on board to provide real time satellite positions with an accuracy of some tens of centimeters. In addition to enabling orbit determination, data are provided to:

• help in the understanding of the dynamics of the solid Earth;
• monitor glaciers, landslides and volcanoes;
• improve the modeling of the Earth gravity field and of the ionosphere.

• pictures of hardware
  • DORIS Ground Station Network
• more information

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry