A new fourth-order processing algorithm for spaceborne SAR

Author

Eldhuset, Knut

Author_Institution

Div. for Electron., Norwegian Defence Res. Establ., Kjeller, Norway

Volume

34

Issue

3

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

824

Lastpage

835

Abstract

A new fourth-order signal aperture radar (SAR) processing algorithm has been developed for a general satellite-Earth relative motion. The two-dimensional exact transfer function (ETF) is calculated and range-variant phase corrections have been calculated in order to process many azimuth lines per block. The ETF together with the phase corrections has been called the fourth-order EETF (extended ETF). It is also shown that a fourth-order EETF is necessary to process high quality images from spaceborne SAR with long integration times with spatial resolution around 1 m. The algorithm is fast and is anticipated to have good phase preservation properties

Keywords

digital simulation; radar theory; signal processing; spaceborne radar; synthetic aperture radar; transfer functions; azimuth lines; extended ETF; fourth-order EETF; fourth-order processing algorithm; fourth-order signal aperture radar; high quality images; integration times; phase corrections; phase preservation; range-variant phase corrections; satellite-Earth relative motion; spaceborne SAR; spatial resolution; synthetic aperture radar; two-dimensional exact transfer function; Azimuth; Chirp; Earth; History; Orbital calculations; Satellites; Signal processing; Spaceborne radar; Synthetic aperture radar; Transfer functions;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.705890

Filename

705890