Title :
Development of a Truck-Mounted Arc-Scanning Synthetic Aperture Radar
Author :
Hoonyol Lee ; Jae-Hee Lee ; Kwang-Eun Kim ; Nak-Hoon Sung ; Seong-Jun Cho
Author_Institution :
Dept. of Geophys., Kangwon Nat. Univ., Chuncheon, South Korea
Abstract :
This paper presents the development of a ground-based arc-scanning synthetic aperture radar (ArcSAR) system mounted on a truck. ArcSAR formulates synthetic aperture by a horizontal circular motion of antennas attached at the end of an extendable boom. The ArcSAR system is designed to operate in two different imaging modes: the spot mode and the scan mode . The spot mode obtains a high-resolution image by fixing the view angle of antennas toward a target. The scan mode obtains wider image coverage with a reduced resolution by fixing the antennas relative to the boom. Different SAR focusing algorithms were implemented for the accuracy and efficiency of image processing: the time domain algorithm for the spot mode and the range Doppler algorithm for the scan mode. An exemplary X-band ArcSAR spot mode image, obtained with a 180 ° scanning of 4-m boom, has an azimuth resolution of 0.07 ° , which is equivalent to the 12.6-m linear scanning of a conventional ground-based SAR system. An ArcSAR scan mode image was successfully obtained as well, covering a 350 ° image area at an azimuth resolution of 1.07 °, which is 11 times better than that of arc-scanning real aperture radar that would have 11.84 ° azimuth resolution.
Keywords :
Doppler radar; antennas; geophysical equipment; radar imaging; remote sensing by radar; synthetic aperture radar; ArcSAR formulation; ArcSAR scan mode image; ArcSAR system development; SAR focusing algorithms; antenna view angle fixing; arc-scanning real aperture radar; azimuth resolution; conventional ground-based SAR system linear scanning; exemplary X-band ArcSAR spot mode image; extendable boom; ground-based arc-scanning synthetic aperture radar development; high-resolution image; horizontal circular antenna motion; image area; image processing accuracy; image processing efficiency; imaging mode; range Doppler algorithm; reduced resolution; scan mode; time domain algorithm; truck-mounted arc-scanning synthetic aperture radar development; wider image coverage; Arc-scanning synthetic aperture radar (ArcSAR); SAR; range Doppler algorithm; scan mode; spot mode; time domain algorithm;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2013.2265700