On Synthetic Aperture Radar Azimuth and Range Resolution Equations

Author

Vu, Viet T. ; Sjögren, Thomas K. ; Pettersson, Mats I.

Author_Institution

Blekinge Inst. of Technol., Karlskrona, Sweden

Volume

48

Issue

2

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

1764

Lastpage

1769

Abstract

This paper discusses spatial resolutions for ultrawide-band-ultrawide-beam (UWB) synthetic aperture radar (SAR) in comparison to narrow-band-narrow-beam (NB) SAR. The study shows that in the intensity interval from -6 dB to 0 dB, the behavior of the impulse response function in NB SAR imaging (IRF-NSAR)-sinc function-and the impulse response function in UWB SAR imaging (IRF-USAR) in azimuth and range are similar. This similarity is utilized in a derivation of new spatial resolution equations for UWB SAR based on -3 dB width or half power beamwidth (HPBW). Signal fractional bandwidth and associated integration angle are shown to affect the behavior of IRF-USAR. The effects to HPBW are described by the so-called HPBW narrowing/broadening factors.

Keywords

image resolution; integration; radar imaging; radar resolution; synthetic aperture radar; transient response; ultra wideband radar; HPBW; IRF-NSAR-sinc function; IRF-USAR; NB SAR imaging; UWB SAR imaging; half power beamwidth; impulse response function; integration angle; intensity interval; narrow-band-narrow-beam SAR; range resolution equation; signal fractional bandwidth; spatial resolution equation; synthetic aperture radar azimuth; ultrawide-band-ultrawide-beam synthetic aperture radar; Approximation methods; Azimuth; Bandwidth; Equations; Niobium; Spatial resolution;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/TAES.2012.6178096

Filename

6178096