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Proceedings Paper

Design and preliminary experiment of China imaging altimeter
Author(s): Yunhua Zhang; Jingshan Jiang; Xiangkun Zhang; Ke Xu; Jingye Yan; Changhong Jiang; Liqing Lei
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Paper Abstract

The design of the China Imaging ALTimeter (CIALT) and the flight experiment of its airborne model are presented in this paper. The system is aimed for providing observation measure for both oceanic applications and continental topographic mapping in the future. The motivation of this project is to develop a three dimensional imager fitted for small satellites with small volume, mass and power consumption. An experimental airborne model of the CIALT has been developed for verifying the design concept. The CIALT integrates three techniques together, i.e. the height measurement and tracking technique of traditional radar altimeter used for ocean applications, the synthetic aperture technique and the interferometric technique. A robust height tracker has been designed for meeting the requirements of both oceanic surfaces and continental surfaces (including surfaces of ice continent). The synthetic aperture technique is used for achieving a higher azimuthal resolution along the cross range direction compared with that of a traditional altimeter. The interferometric technique is used for retrieving the height information corresponding to each image pixel and for boresight angle correction of the antennas, which is crucial for accurate height measurement. The CIALT is different from other proposed imaging altimeters, such as SAR altimeter and scanning altimeter, in which no height tracker is involved. Some key technologies regarding the development of imaging altimeter are addressed, such as the antenna design, the transmitter, the receiver and the robust tracking algorithm.

Paper Details

Date Published: 30 April 2003
PDF: 9 pages
Proc. SPIE 4894, Microwave Remote Sensing of the Atmosphere and Environment III, (30 April 2003); doi: 10.1117/12.466230
Show Author Affiliations
Yunhua Zhang, Ctr. for Space Science and Applied Research, CAS (China)
Jingshan Jiang, Ctr. for Space Science and Applied Research, CAS (China)
Xiangkun Zhang, Ctr. for Space Science and Applied Research, CAS (China)
Ke Xu, Ctr. for Space Science and Applied Research, CAS (China)
Jingye Yan, Ctr. for Space Science and Applied Research, CAS (China)
Changhong Jiang, Ctr. for Space Science and Applied Research, CAS (China)
Liqing Lei, Ctr. for Space Science and Applied Research, CAS (China)


Published in SPIE Proceedings Vol. 4894:
Microwave Remote Sensing of the Atmosphere and Environment III
Christian D. Kummerow; JingShang Jiang; Seiho Uratuka, Editor(s)

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