Calibration of a ground-based array radar for tomographic imaging of natural media
Artikel i vetenskaplig tidskrift, 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. © 2019 by the authors.

Ground-based radar

Calibration

Tomography

Synthetic aperture radar

Mutual coupling

Författare

Albert Monteith

Chalmers, Rymd-, geo- och miljövetenskap, Mikrovågs- och optisk fjärranalys

Lars Ulander

Chalmers, Rymd-, geo- och miljövetenskap, Mikrovågs- och optisk fjärranalys

S. Tebaldini

Politecnico di Milano

Remote Sensing

2072-4292 (ISSN)

Vol. 11 24 2924

Ämneskategorier

Geofysik

Datorseende och robotik (autonoma system)

Medicinsk bildbehandling

DOI

10.3390/rs11242924

Mer information

Senast uppdaterat

2020-01-30