Estimation of synthetic aperture radar modulation transfer function parameters with spotlight mode data

Author

Wackerman, Christopher

Author_Institution

Environ. Res. Inst., Michigan Univ., Ann Arbor, MI, USA

fYear

1993

fDate

18-21 Oct 1993

Abstract

During SAXON-FPN spotlight mode Synthetic Aperture Radar (SAR) data was collected of ocean surface waves under different environmental conditions and imaging geometries. From this data, estimates can be derived for the values of three ocean surface parameters of importance to SAR imaging: (1) the range of radial velocities within a SAR resolution cell; (2) the magnitude of the real transfer function; and (3) the phase of the real transfer function. The real transfer function relates surface wave height modulations to modulations in radar cross section. In this paper the author describes a procedure to estimate these parameters from the spotlight data and show results from the SAXON-FPN data. For certain imaging geometries the parameter estimates are consistent with previous in situ measurements

Keywords

backscatter; electromagnetic wave scattering; ocean waves; oceanographic techniques; radar cross-sections; remote sensing; remote sensing by radar; synthetic aperture radar; FPN; SAR; SAXON; SHF UHF microwave; imaging; imaging geometry; measurement technique; modulation transfer function; ocean wave sea surface; phase; radar cross section; radar remote sensing; radar scattering; radial velocities; real transfer function; spotlight mode; surface parameters; surface wave; synthetic aperture radar; wave height modulation; Geometry; Image resolution; Oceans; Parameter estimation; Phase estimation; Radar polarimetry; Sea surface; Surface waves; Synthetic aperture radar; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '93. Engineering in Harmony with Ocean. Proceedings

Conference_Location

Victoria, BC

Print_ISBN

0-7803-1385-2

Type

conf

DOI

10.1109/OCEANS.1993.326207

Filename

326207