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Proceedings Paper

The imaging method and sampling scheme of rotation scanning interferometric radiometer
Author(s): Cheng Zhang; Ji Wu; Weiying Sun
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Paper Abstract

Rotation scanning interferometric radiometer is a kind of new proposed time shared imaging concept for purpose of further decreasing the hardware complexity and increasing the spatial resolution. The main problem need to be solved is the image reconstruction from the rotation sampling visibilities. In this study we develop a Pseudo-Polar FFT algorithm that suitable for dealing with the polar sampling grid data of rotation scanning system. It takes pseudo polar grid as the conversion destination instead of traditional Cartesian rectangular grid before the Fourier inversion. The involved effective 1D interpolations and 1D-FFT routines in this imaging algorithm guaranteed a high accuracy and computational efficiency. Moreover we analyzed the associated rotation sampling scheme such as the antenna array arrangement and rotation sampling interval which have great effects on the reconstruction results. Numerical simulations are present for validating the superiority of this new imaging algorithm. Simulation results also indicated that the non-redundant plane antenna array with good linearity is the prefer array arrangement for rotation scanning system.

Paper Details

Date Published: 24 November 2008
PDF: 8 pages
Proc. SPIE 7123, Remote Sensing of the Environment: 16th National Symposium on Remote Sensing of China, 712305 (24 November 2008); doi: 10.1117/12.815551
Show Author Affiliations
Cheng Zhang, Ctr. for Space Science and Applied Research (China)
Ji Wu, Ctr. for Space Science and Applied Research (China)
Weiying Sun, Ctr. for Space Science and Applied Research (China)
Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 7123:
Remote Sensing of the Environment: 16th National Symposium on Remote Sensing of China
Qingxi Tong, Editor(s)

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