Development of a Truck-Mounted Arc-Scanning Synthetic Aperture Radar

作者：Lee Hoonyol^*; Lee Jae Hee; Kim Kwang Eun; Sung Nak Hoon; Cho Seong Jun

来源：IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(5): 2773-2779.

DOI：10.1109/TGRS.2013.2265700

• Arc-scanning synthetic aperture radar (ArcSAR)
• range Doppler algorithm
• SAR
• scan mode
• spot mode
• time domain algorithm

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 degrees scanning of 4-m boom, has an azimuth resolution of 0.07 degrees, 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 degrees image area at an azimuth resolution of 1.07 degrees, which is 11 times better than that of arc-scanning real aperture radar that would have 11.84 degrees azimuth resolution.

• 出版日期2014-5