Title :
Complex spectral Fourier-domain imaging method for Synthetic Aperture Microwave Radiometer
Author :
Qiong Wu ; Ji Wu
Author_Institution :
Center for Space Sci. & Appl. Res., Beijing, China
Abstract :
Conventional microwave radiometer belongs to spatial-domain imaging system to detect area thermal source and it acquires radiometric signal from the object source point and point. Synthetic Aperture Microwave Radiometer belongs to staring imaging system. It applies Fourier-domain technique to obtain source´s microwave spectrum called visibility and thus make scanning process not necessary. This novel imaging method can save much consuming time and simplify the imaging process and it can accomplish high-speed imaging solution at the same time. The paper demonstrates how to get spatial distribution information of the of continuous area thermal sources from coherent signal receiving technique. But the signal processing in this fast imaging method brings cross interference components if the source is partly coherent. The paper gives a solution to eliminate such components.
Keywords :
geophysical signal processing; geophysical techniques; interferometry; microwave imaging; radiometry; Fourier-domain technique; coherent signal receiving technique; cross interference components; microwave spectrum; object source point; phase-shifting interferometer technique; signal processing; spatial distribution information; spatial-domain imaging system; staring imaging system; synthetic aperture microwave radiometer; thermal sources; visibility; Apertures; Correlation; Microwave imaging; Microwave radiometry; Microwave theory and techniques; Phase shifting interferometry; Synthetic aperture; cross interference; microwave radiometer; phase-shifting interferometer technique; staring imaing system; vsibility;
Conference_Titel :
Geoscience and Remote Sensing (IITA-GRS), 2010 Second IITA International Conference on
Conference_Location :
Qingdao
Print_ISBN :
978-1-4244-8514-7
DOI :
10.1109/IITA-GRS.2010.5603093