One of the main challenges in GeoSAR processing is accurately determining the satellite orbit. To tackle this challenge, a multiple baseline ground-based interferometer is proposed. As a proof of concept, this paper presents the results obtained from a single baseline prototype, whose results can be extrapolated to a larger system.

This paper proposes two different calibration techniques for Geostationary Synthetic Aperture Radar (GEOSAR) missions requiring a high precision positioning, based on Active Radar Calibrators and Ground Based Interferometry. The research is enclosed in the preparation studies of a future GEOSAR mission providing continuous monitoring at continental scale.

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