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An Innovative Superpolyhedron (SP) Formation for Multistatic SAR (M-SAR) Interferometry.
- Source :
- IEEE Transactions on Geoscience & Remote Sensing; Dec2021, Vol. 59 Issue 12, p10136-10150, 15p
- Publication Year :
- 2021
-
Abstract
- Spaceborne multistatic synthetic aperture radar (M-SAR) has extensive applications, including multiangle imaging, digital beamforming (DBF) and cross- and along-track interferometry. However, it is difficult for classical satellite formations to meet the multimission (e.g., cross-track interferometry and along-track interferometry, i.e., XTI and ATI) requirements of M-SAR concurrently. Therefore, superpolyhedron (SP), an innovative satellite formation based on the dual-helix and pendulum formations, is proposed to maximize the coverage ratio of the effective cross- and along-track interferometric baselines at the same time. A method of constructing the SP formation is detailed. The method is a three-step procedure, in which the first two steps aim at obtaining an initial formation via exploiting the geometry of the formation dynamics; the last step solves an optimization problem. Then, the design of a supertetrahedron (ST) formation, a special case of the SP formation, is investigated as a numerical example. The merit of SP formation is represented as the coverage ratios of effective cross- and along-track interferometric baselines. The result is compared with those of the classical satellite formations. It shows that only the coverage ratios of the ST formation are greater than 70% simultaneously. Therefore, the ST formation can realize both effective XTI and ATI. It implies that the SP formation has the potential to be used in future spaceborne M-SAR interferometry. [ABSTRACT FROM AUTHOR]
- Subjects :
- SYNTHETIC aperture radar
INTERFEROMETRY
SPACE-based radar
Subjects
Details
- Language :
- English
- ISSN :
- 01962892
- Volume :
- 59
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Geoscience & Remote Sensing
- Publication Type :
- Academic Journal
- Accession number :
- 153854153
- Full Text :
- https://doi.org/10.1109/TGRS.2021.3051727