Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.213..185t&link_type=abstract
In ESA QUASAT: A VLBI Obs. in Space p 185-186 (SEE N85-16700 07-88)
Astronomy and Astrophysics
Astronomy
Diffraction Patterns, Quasat, Space Navigation, Spaceborne Astronomy, Very Long Base Interferometry, Dynamic Models, Satellite Tracking, Spacecraft Models
Scientific paper
The use of fringe tracking to assure the high precision navigation required for astrometric, astronomical and geodynamic applications of QUASAT VLBI data is proposed. No additional onboard equipment is needed, since the method is based on postprocessing of fringe phase and rate. High accuracy fringe detection hardware and software are needed, along with continuous interferometric observation between spacecraft and ground stations, and near real time correlating. Position accuracy could be within 10 cm at 22GHz, 40 cm at 5 GHz and 125 cm at 1.6 GHz, if a high accuracy dynamic spacecraft model is used.
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