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Though the power line's diameter was only 1∼3 centimetres, it could generate strong reflection in high resolution strip mode SAR images while the line direction was along the radar azimuth. This paper chose one set of line scatterers and analysed the changes among time series images in HK area. There were 8 line scatterers in these set which reflected by 6 power wires and 2 ground wires. Each of the...
This paper presents a multiimage DInSAR approach to obtain ground movement using the quasi coherent targets (Q-CTs), such as the bare land and light cultivated areas that distribute widely on the suburban ground surface. The method adopts a new processing strategy for targets selection based on the classification information and coherence properties of the ground objects. Furthermore, the linked coherence...
Persistent Sactterers Interferometry(PSI) technique is a series of advanced DInSAR methods which can reconstruct the time-series deformation of those coherent points in the direction of the satellite line-of-sight(LOS) with millimetric accuracy over a long temporal scale. It overcomes the problems caused by temporal and geometric decorrelations and the atmospheric dishomogeneities in conventional...
This study presents a dynamic deformation retrieval method for differential synthetic aperture radar interferometry (DInSAR) processing. Detailed nonlinear displacement parameters are modeled and estimated for capturing the developing trends of ground movement both in time and space. In order to reduce the system disturbance errors such as atmospheres and platform deviations, the singular value decomposition...
Recent years, the application of multi-baseline DInSAR was primarily possible in the case of slow ground movements. In this paper, the application of Beijing-Tianjin intercity railway roadbed deformation monitoring based on multi-baselines DInSAR is present. To enable this, the advanced network algorithm is adapted for pixels linking. Our study is based on 15 ALOS PALSAR images during one-year period...
PS-DInSAR technique fusing multi-metadata and its basic flow are expounded considering limitations of conventional D-InSAR in atmospheric delay and space-time decoherence. It is held that multi-metadata helps to weaken the influence of systematic error and improve the surveying precision and model steadiness of PS-DInSAR. Tianjing City is surveyed in PS-DInSAR fusing ENVISAT ASAR from 2003 to 2007,...
In this paper, we present the results of D-InSAR technique and conventional leveling at selected area in Tianjin city, using 8 ENVISAT SAR images between 17 October 2003 and 17 February 2005.The D-InSAR results show that the subsidence rate reached over 5 cm/year (7 cm within 16 months) in highly sinking area, and it is consistent with leveling results. D-InSAR is able to provide more details of urban...
Modem imaging radar such as SAR is capable of generating images of targets. This paper analyzes the fixed offsets of the false target by using the scatter-wave jamming mode, and then presents a method to synthesize a false target with given offsets both in range and azimuth direction. Finally the modulation equation is given for the jammer.
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