Velocity estimation of slow moving targets in AT-InSAR systems

A. Budillon; V. Pascazio; G. Schirinzi

doi:10.1117/12.739645

3 October 2007 Velocity estimation of slow moving targets in AT-InSAR systems

A. Budillon, V. Pascazio, G. Schirinzi

Proceedings Volume 6746, SAR Image Analysis, Modeling, and Techniques IX; 67460D (2007) https://doi.org/10.1117/12.739645
Event: SPIE Remote Sensing, 2007, Florence, Italy

Abstract

Along Track Interferometric Synthetic Aperture Radar (AT-InSAR) systems use more than one SAR antennas (typically two), mounted on the same platform and displaced along the platform moving direction, to detect slow ground moving targets. The phase of the ATI signal is related to the target motion parameters and may thus be used to estimate the radial velocity. In this paper we approach the velocity estimation problem using statistical techniques based on the statistical distribution of the measured interferometric phases. We analyze the radial velocity estimation with respect to ATI system parameters, such as velocity values, the signal to clutter ratio (SCR), the clutter to noise ratio (CNR), considering a deterministic target whose velocity is estimated using a Gaussian model. This model allows to take into account the lack of knowledge of the target radar cross section (RCS) values and provides an analytical form for the interferometric phase probability density function. Simulations results show that the adoption of Maximum Likelihood (ML) techniques, to perform a joint estimation of velocity and SCR, and multi-channel configurations, to overcome ambiguities problems, provide very good velocity estimation accuracy.

Citation Download Citation

A. Budillon, V. Pascazio, and G. Schirinzi "Velocity estimation of slow moving targets in AT-InSAR systems", Proc. SPIE 6746, SAR Image Analysis, Modeling, and Techniques IX, 67460D (3 October 2007); https://doi.org/10.1117/12.739645

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KEYWORDS

Interferometry

Phase interferometry

Statistical analysis

Phase measurement

Antennas

Interference (communication)

Target acquisition

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