Remote Sensing Laboratory, Department of Signal and Communications Theory, Universitat Politècnica de Catalunya, C/Jordi Girona $[1$-$3]$, Barcelona 08034, Spain
Corresponding author (email@example.com
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.
This work has been financed by the Spanish Science, Research and Innovation Plan (MINECO) with Project Code TIN2014-55413-C2-1-P.
(Color online) Conceptual image of the coverage and geometry of a GeoSAR mission.
(Color online) Representation of the projection of the unitary wavefront vector upon the baseline vector.
(Color online) Single baseline simplification.
(Color online) Geometry of the three-dimensional Euclidean model.
(Color online) Zenith view of the receiver locations at the UPC Campus Nord D3 building.
(Color online) Conceptual block diagram of the interferometer depicting the hardware performing the full operation
(Color online) Stream of unwrapped raw data acquired during 6 days. One sample per second. The highlighted area represents the data used during the orbital determination procedure.
(Color online) Propagated orbits from the initial TLE state vector (green) and the least-squares-processed interferometric phase (red). 48 hours period.
(Color online) Representation of the acquired interferometric phases (green) and the simulated phases from the TLE (blue) and the least-squares filter output (red).
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