Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B7, 859-864, 2016
http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B7/859/2016/
doi:10.5194/isprs-archives-XLI-B7-859-2016
 
22 Jun 2016
EVALUATION OF RELATIVE GEOMETRIC ACCURACY OF TERRASAR-X BY PIXEL MATCHING METHODOLOGY
T. Nonaka1, T. Asaka2, and K. Iwashita1 1Dept. of Sustainable Engineering, College of Industrial Technology, Nihon University, 1-2-1, Izumi-cho, Narashino, Chiba, Japan
2Dept. of Civil Engineering, College of Industrial Technology, Nihon University, 1-2-1, Izumi-cho, Narashino, Chiba, Japan
Keywords: Remote sensing, SAR, Geo-location accuracy, Pixel matching Abstract. Recently, high-resolution commercial SAR satellites with several meters of resolutions are widely utilized for various applications and disaster monitoring is one of the commonly applied areas. The information about the flooding situation and ground displacement was rapidly announced to the public after the Great East Japan Earthquake 2011. One of the studies reported the displacement in Tohoku region by the pixel matching methodology using both pre- and post- event TerraSAR-X data, and the validated accuracy was about 30 cm at the GEONET reference points. In order to discuss the spatial distribution of the displacement, we need to evaluate the relative accuracy of the displacement in addition to the absolute accuracy. In the previous studies, our study team evaluated the absolute 2D geo-location accuracy of the TerraSAR-X ortho-rectified EEC product for both flat and mountain areas. Therefore, the purpose of the current study was to evaluate the spatial and temporal relative geo-location accuracies of the product by considering the displacement of the fixed point as the relative geo-location accuracy. Firstly, by utilizing TerraSAR-X StripMap dataset, the pixel matching method for estimating the displacement with sub-pixel level was developed. Secondly, the validity of the method was confirmed by comparing with GEONET data. We confirmed that the accuracy of the displacement for X and Y direction was in agreement with the previous studies. Subsequently, the methodology was applied to 20 pairs of data set for areas of Tokyo Ota-ku and Kawasaki-shi, and the displacement of each pair was evaluated. It was revealed that the time series displacement rate had the seasonal trend and seemed to be related to atmospheric delay.
Conference paper (PDF, 2093 KB)


Citation: Nonaka, T., Asaka, T., and Iwashita, K.: EVALUATION OF RELATIVE GEOMETRIC ACCURACY OF TERRASAR-X BY PIXEL MATCHING METHODOLOGY, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B7, 859-864, doi:10.5194/isprs-archives-XLI-B7-859-2016, 2016.

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