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Estimation of Radial Velocity of Moving Targets by Along-Track Interferometric SAR Systems

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3 Author(s)
Alessandra Budillon ; Dipt. per le Tecnol., Univ. di Napoli "Parthenope", Naples ; Vito Pascazio ; Gilda Schirinzi

Along-track interferometric synthetic aperture radar (AT-InSAR) can be used to estimate the radial velocity of ground moving targets, starting from interferometric phase measures. The estimation obtained from a single-phase interferogram suffers from ambiguities. To solve these problems, multichannel AT-InSAR systems are required. In this letter, we analyze the radial velocity maximum-likelihood estimation accuracy with respect to AT-InSAR system parameters, such as velocity values and different clutter and thermal noise levels. We consider two different models for the target response: a deterministic model and a zero-mean Gaussian model. The presented results show that AT-InSAR systems exhibit better estimation accuracies for low-velocity values (slow targets).

Published in:

IEEE Geoscience and Remote Sensing Letters  (Volume:5 ,  Issue: 3 )