Abstract
This letter shows that in a repeat-pass data set of synthetic aperture radar (SAR) images, a long-term coherent component, when present, can be recovered by coherent temporal filtering of the SAR images and can successively form interferograms with higher signal-to-noise ratio. The validity of the idea is confirmed through simulations and one example with real TerraSAR-X data. The theoretical necessity of using long-term interferograms is also discussed and linked to autoregressive processes, starting from the observation that the optimal weighting is given by the inverse of the covariance matrix.
Original language | English |
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Article number | 5657232 |
Pages (from-to) | 502-506 |
Number of pages | 5 |
Journal | IEEE Geoscience and Remote Sensing Letters |
Volume | 8 |
Issue number | 3 |
DOIs | |
Publication status | Published - May 2011 |
Externally published | Yes |
Keywords
- Synthetic aperture radar interferometry