Calibration of a Ground-Based Array Radar for Tomographic Imaging of Natural Media
Journal article, 2019

Ground-based tomographic radar measurements provide valuable knowledge about the electromagnetic scattering mechanisms and temporal variations of an observed scene and are essential in preparation for space-borne tomographic synthetic aperture radar (SAR) missions. Due to the short range between the radar antennas and a scene being observed, the tomographic radar observations are affected by several systematic errors. This article deals with the modelling and calibration of three systematic errors: mutual antenna coupling, magnitude and phase errors and the pixel-variant impulse response of the tomographic image. These errors must be compensated for so that the tomographic images represent an undistorted rendering of the scene reflectivity. New calibration methods were described, modelled and validated using experimental data. The proposed methods will be useful for future ground-based tomographic radar experiments in preparation for space-borne SAR missions.

calibration

tomography

mutual coupling

synthetic aperture radar

ground-based radar

Author

Albert Monteith

Chalmers, Space, Earth and Environment, Microwave and Optical Remote Sensing

Lars Ulander

Chalmers, Space, Earth and Environment, Microwave and Optical Remote Sensing

Stefano Tebaldini

POLIMI

Remote Sensing

2072-4292 (ISSN)

Vol. 11 24 1-22 2924

Tower-based radar and geophysical measurements during the BorealScat experiment

European Space Agency (ESA), 2016-11-01 -- 2018-04-30.

European Space Research and Technology Centre (ESA ESTEC), 2016-11-01 -- 2018-04-30.

Driving Forces

Sustainable development

Subject Categories

Remote Sensing

Physical Geography

Signal Processing

Geosciences, Multidisciplinary

Roots

Basic sciences

Areas of Advance

Life Science Engineering (2010-2018)

DOI

10.3390/rs11242924

More information

Latest update

5/20/2020