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Two dimensional least redundant array for interferometric synthetic aperture radiometer

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2 Author(s)
Baoyu He ; Center for Space Sci. & Appl. Res., Chinese Acad. of Sci., Beijing, China ; Wu, J.

Synthetic aperture radiometer applies the interferometric principle to sample in the spatial frequency domain and retrieve the image by Fourier or other numerical transformation. Using this technology, a substantial reduction can be obtained compared to a conventional imaging radiometer. In this paper, the study on least redundant two-dimensional array configuration is presented with numerical simulation examples in two types of configurations. One uses half-circle configuration with least redundant number of elements and taking image by rotating the array. The other configuration selects element positions using simulated annealing around a full-circle to provide a roughly uniform distributed sampling coverage in two-dimensional spatial frequency domain. The results show that the number of elements left round the full circle can also reach the least redundant number, i.e. M=CN2, where N is the number of antenna elements and M is the number of different baseline combinations, represent the maximum number of sampling points in the spatial frequency domain.

Published in:

Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International  (Volume:7 )

Date of Conference:

21-25 July 2003