Future GeoSAR missions are expected to provide higher resolution radar images featuring shorter revisit times by locating a radar payload on-board of a geostationary satellite. One of the main challenges in GeoSAR processing is accurately determining the satellite orbit to obtain a precise phase history, in order to properly focus the retrieved data. To tackle this challenge, a multiple baseline ground-based interferometer is proposed as a compact and reliable method to achieve an unprecedented accuracy. 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, able to be used in future missions.
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This work has been financed by the Spanish Science, Research and Innovation Plan (MINECO) with Project Code TIN2014-55413-C2-1-P.
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Fuster, R.M., Fernández Usón, M. & Broquetas Ibars, A. Interferometric orbit determination for geostationary satellites. Sci. China Inf. Sci. 60, 060302 (2017). https://doi.org/10.1007/s11432-016-9052-y
- orbit determination
- geostationary SAR