Conference Proceeding

Imaging algorithm and experimental demonstration of rotating scanning interferometric radiometer

08/2010; DOI:10.1109/IGARSS.2010.5652170 In proceeding of: Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International
Source: IEEE Xplore

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.

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Keywords

1D FFT routine
 
5-elements RS-SAIR instrument
 
antenna elements
 
associate theory
 
attentions
 
computation efficiency
 
looser requirements
 
polar u-v samples
 
pseudo-polar FFT algorithm
 
rotation scanning synthetic aperture interferometric radiometer
 
simpler configuration