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| | Abstract | | The error handling is an important problem, when applying InSAR technology to the long-range ground deformation measurement. The error factors of InSAR measurement are summarized as follows. an error at the time of registration, estimation error of the distance between orbits, the phase limit of the critical distance between orbits, the atmospheric phase delay, low coherence, a sensor noise, and the error of DEM. However, when actually analyzing, the following problems occur. there are quite a few InSAR pairs with high coherence even the good interference conditions, the estimation of the distance between orbits and the phase unwrapping processing are unstable, InSAR pairs acquired at the same season are used to avoid the problem of atmospheric phase delay. In addtion, a subject remains in stabilization of inversion processing, and L band data PALSAR pairs have low coherence. Finally, the current problems of commercial InSAR software are also summarized. |
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