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Li Y.,Chinese Academy of Geological Sciences | Zhao H.,Beijing Land Resources Information Development Research Laboratory | Fan J.,Beijing Land Resources Information Development Research Laboratory
MATEC Web of Conferences | Year: 2015

Mine environment problem caused by the exploitation of mineral resources has become a key factor which affects normal production of mine and safety of ecological environment for human settlement. For better protection and management of mine environment, this article has introduced the important role of remote sensing technology in pollution monitoring of mine environment, geological disaster monitoring and monitoring of mining activities. © Owned by the authors, published by EDP Sciences, 2015. Source


Zhao H.,China University of Geosciences | Zhao H.,Beijing Land Resources Information Development Research Laboratory | Fan J.,China Aerospace Geophysical Survey and Remote Sensing Center for Land and Resources | Guo X.,China Aerospace Geophysical Survey and Remote Sensing Center for Land and Resources | And 8 more authors.
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2010

Land subsidence in Beijing is supposed to be caused by over-exploitation of ground water, which is leading to a rapid decline of water levels, drying out clay layers that finally result in land subsidence. The Interferometric Point Target Analysis (IPTA) is an advanced method to monitor vertical motion of the land surface over time. IPTA identifies backscattering objects, named as coherent points or points targets, at the ground surface that persistently reflect radar radiation emitted by the SAR antenna. The core component of the IPTA technique is the iterative estimation of phase differences for all measurement points over the sets of the SAR data using a linear model. In this paper, IPTA technique was used to retrieve the phase history, extract the linear deformation information from interferometry phase and weaken atmosphere phase delay in Beijing. 20 ENVISAT ASAR images acquired between June-18-2003 and March-14-2007 have been selected. The intention of this article is to demonstrate how IPTA technique could be used to extract valuable information in Beijing area. © 2010 IEEE. Source


Zhao H.,China University of Geosciences | Zhao H.,Beijing Land Resources Information Development Research Laboratory | Liu H.,China University of Geosciences | Liu H.,Beijing Land Resources Information Development Research Laboratory | And 8 more authors.
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2010

In this paper, the methods, primary PS-like method and Stanford Method for PS (StaMPS) are both studied and used to monitor the subsidence in Tianjin area. PS (Permanent Scatter) technique is possible to avoid many of the limitations of conventional DInSAR by analyzing just certain pixels which behave like point scatters and retain good correlations. Several PS-like methods have been developed and practiced by many researchers. StaMPS is a relatively new PS-like method, which uses spatial correlation of interferogram phase to find a network of stable pixels in almost all terrain without prior knowledge of temporal variations in the deformation. 17 ENVISAT SLC data for Tianjin area are used, covering from April 2003 to March 2006. The SLC scene acquired on Nov-05-2004 is chose as the master. And the results of the two methods are compared. By using the primary PS-like method and StaMPS, the subsidence field in Tianjin area has been mapped. As to PS selection, the primary PS-like method needs less input parameters and easier to understand than StaMPS. For deformation value calculation, StaMPS is good at evaluating non-linear subsidence history. © 2010 IEEE. Source


Liu H.-H.,China University of Geosciences | Liu H.-H.,Beijing Land Resources Information Development Research Laboratory | Chen J.-P.,China University of Geosciences | Chen J.-P.,Beijing Land Resources Information Development Research Laboratory | And 4 more authors.
Progress in Electromagnetics Research Symposium | Year: 2010

In this paper, StaMPS, a new PS method, which uses spatial correlation of interferogram phase to find PSs in almost all terrain without temporal variation models in the deformation is applied to monitor the substance in Tianjin area and landslide in Xintan area. After PSs selected and the deformation estimated by StaMPS, Kriging interpolation is applied to Tianjin test to get a continuous deformation sense and the results are shown in 3D views. Source


Zhao H.-L.,China University of Geosciences | Zhao H.-L.,Beijing Land Resources Information Development Research Laboratory | Fan J.-H.,China Aerospace Geophysical Survey and Remote Sensing Center for Land and Resources | Wang Z.-C.,China University of Geosciences | And 5 more authors.
Progress in Electromagnetics Research Symposium | Year: 2010

COSMO SkyMed satellites are very suitable for natural disaster monitoring, because they can acquire high quality images with very high resolution. DInSAR can map ground deformation phenomena over tens-of-kilometers-wide area with centimeter-scale accuracy level, and has been considered as a powerful tool. In this paper, COSMO-SkyMed SAR and ASAR data are respectively processed by DInSAR for land subsidence derivation in Tianjin. The comparison between the two preliminary results shows that similar deformation trend can be identified based on the two kinds of SAR data and the deformation values of COSMO's DInSAR result are closer to truth. With the characteristics of high resolution and short wavelength, COSMO data seem more robust for extract high-precision ground deformation information than ASAR data in case of no obvious orbit error existing in both the 2 kinds of data. While COSMO data are suitable for high-precision information extraction in a relatively small and important area, ASAR data are fit for large area, regional surface deformation survey. Source

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