Space Intersection of Bi-directional SAR Images for Precise Spatial Data

Conference: EUSAR 2018 - 12th European Conference on Synthetic Aperture Radar
06/04/2018 - 06/07/2018 at Aachen, Germany

Proceedings: EUSAR 2018

Pages: 5Language: englishTyp: PDF

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Saeed, Adnan; Hellwich, Olaf (Technical University Berlin, Germany)
Koenig, Rolf (Helmholtz Centre GFZ German Research Centre for Geosciences Potsdam, Germany)

Spatial data is derived as three-dimensional coordinates of a point on earth’s surface using the TerraSAR-X’s orbital information extracted from metadata together with azimuth time and slant range. Sensors zero-doppler location is obtained at a submillimeter accuracy using least squares orbital interpolation of state vectors. Constant range circles from the interpolated locations, of ascending and descending pass, are drawn to obtain co-ordinates of a uniquely designed corner reflector. Such double-sided corner reflectors fulfill the requirement of a good stereo geometry and have significant reflection which is precisely detected in the image. The minimum distance between two drawn range circles is calculated. After applying atmospheric delays and some other geometrical corrections an accuracy of a meter level is achieved.