Title :
Imaging algorithm and experimental demonstration of rotating scanning interferometric radiometer
Author :
Zhang, C. ; Liu, H. ; Yan, J.Y. ; Sun, W.Y. ; Zhang, S.W. ; Liu, H.G. ; Wu, J.
Author_Institution :
Center for Space Sci. & Appl. Res., Chinese Acad. of Sci., Beijing, China
Abstract :
Recently, a new concept of rotation scanning synthetic aperture interferometric radiometer (RS-SAIR) has been receiving more and more attentions for its advantage of much simpler configuration with looser requirements of antenna elements. In this article, we investigate the imaging theory of RS-SAIR, and introduce the pseudo-polar FFT algorithm to deal with the polar u-v samples. It only involves 1D interpolation and 1D FFT routine that guarantee a high accuracy and computation efficiency. The sampling strategy and aliasing effect of RS-SAIR are studied with this imaging algorithm. Numerical simulations are provided to validate the associate theory. Finally we develop a 5-elements RS-SAIR instrument and carry out rotating scanning imaging experiment successfully. The first imaging results consist with the expectation.
Keywords :
fast Fourier transforms; interpolation; radar imaging; radar interferometry; radiometers; synthetic aperture radar; ID interpolation; RS-SAIR; imaging algorithm; interferometric radiometer; polar u-v samples; pseudo-polar FFT algorithm; rotating scanning; synthetic aperture interferometric radiometer; Accuracy; Apertures; Arrays; Image reconstruction; Imaging; Interpolation; Microwave radiometry; Interferometric radiometry; interpolation; pseudo-polar FFT; rotating scanning;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-9565-8
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2010.5652170
