High resolution imaging for forward looking SAR with multiple receiving antennas

Author

Dai, Shengli ; Wiesbeck, Wemer

Author_Institution

Dept. of Electron. Eng., Jinan Univ., Guangzhou, China

Volume

5

fYear

2000

fDate

2000

Firstpage

2254

Abstract

There are two most serious problems in the imaging mode of forward-looking SAR (F-SAR). The first one is that the gradient of the Doppler frequency is very small and it is very difficult to achieve high azimuth resolution. The second one is that the terrain targets situated symmetrically about the flight/moving path have the same Doppler history, which causes serious azimuth ambiguity. This paper will adopt an imaging configuration of F-SAR with multiple receiving antennas. The azimuth resolution and ambiguity problem is discussed for this kind of F-SAR. The contribution of multiple receiving antennas to the azimuth unambiguity and high resolution imaging result is analyzed

Keywords

geophysical techniques; radar imaging; radar theory; remote sensing by radar; spaceborne radar; synthetic aperture radar; terrain mapping; Doppler frequency gradient; F-SAR; SAR; azimuth ambiguity; azimuth unambiguity; forward looking SAR; geophysical measurement technique; high resolution imaging; land surface; multiple antenna method; multiple receiving antennas; radar imaging; radar remote sensing; spaceborne radar; synthetic aperture radar; terrain mapping; Antenna arrays; Azimuth; Frequency; High-resolution imaging; History; Image analysis; Phased arrays; Receiving antennas; Satellite broadcasting; Sensor arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International

Conference_Location

Honolulu, HI

Print_ISBN

0-7803-6359-0

Type

conf

DOI

10.1109/IGARSS.2000.858373

Filename

858373