* LOGICA Space and Communications at ESA/ESOC, Robert-Bosch-Strasse 5, D-64293, Darmstadt, Germany
** ESA/European Space Operations Centre, Robert-Bosch-Strasse 5, D-64293, Darmstadt, Germany
Abstract:
Data from the experimental onboard GPS receiver were used to accurately compute the orbit of TOPEX/Poseidon. This represents a unique opportunity to intercompare with two other classical tracking techniques (SLR and DORIS). A review of the methodology used is given together with current results.