Abstract
This study designs a multistatic synthetic aperture radar (SAR) formation-flying system for very-high-resolution stripmap imaging (VHRSI) using manufacturable SAR microsatellites. Multistatic SAR formation specifications for VHRSI are derived based on the SAR image theory. For the simultaneous multi-satellite operation, the advantages of the autonomous orbit and attitude control are prominent in terms of the workload of the ground station or the efficient performance of missions. Therefore, the autonomous relative-orbit-control algorithm using relative orbital elements is developed to maintain the designed multistatic SAR formation. Additionally, an autonomous attitude-control algorithm for multistatic SAR imaging is designed by applying the optimal right-ascension of the descending node (RADN) sector concept. Finally, the resolution improvement of VHRSI is verified through multistatic SAR imaging simulations. The multistatic SAR formation is designed with three satellites separated by 7.5 km each in the along-track direction. Autonomous relative orbit control maintains the relative position error within 45 m (3σ). Additionally, the autonomous attitude control simulation verifies that the satellites perform attitude maneuvers suitable for the operation mode, and the pointing error is maintained within 0.0035° (3σ). The spatial resolution of the multistatic SAR system for VHRSI is 0.95 × 0.96 m, which satisfies the very-high-spatial-resolution requirement.
Reference43 articles.
1. D’Errico, M. (2013). Distributed Space Missions for Earth System Monitoring, Springer.
2. The TerraSAR-X mission and system design;Werninghaus;IEEE Trans. Geosci. Remote Sens.,2010
3. Overview of the TECSAR satellite hardware and mosaic mode;Naftaly;IEEE Geosci. Remote Sens. Lett.,2008
4. Cumming, I.G., and Wong, F.H. (2005). Digital Processing of Synthetic Aperture Radar Data, Artech House.
5. Castillo, J., Younis, M., and Krieger, G. (2017, January 11–13). A HRWS SAR System Design with Multi-beam Imaging Capabilities. Proceedings of the 14th European Radar Conference, Nuremberg, Germany.
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