Integration of ground and space geodetic datasets to monitor the surface deformation has become an effective and important way to take the advantages of both techniques in such studies. Global Positioning System (GPS) calculates the crustal movement in 3 D space at the receiver location. On the other hand, Differential Synthetic Aperture Radar (DInSAR) can measure the change in the measured range along the radar Line of Sight (LOS) in millimeters level of accuracy with high spatial resolution. In this research, GPS measurements and DInSAR data have been used simultaneously to monitor the crustal movement in Aswan south of Egypt. ENVISAT ASAR descending orbit data and GPS observations of Aswan geodetic network from 2008 to 2010 was integrated via SISTEM algorithm. The results of GPS and DInSAR integration show an average motion of 30 ± 4.4 mm, 54.8 ± 27.5, 45.2 ± 11.9 mm in East, North and Vertical directions respectively. The accuracy of GPS and DInSAR data integration is checked using three permanent GPS stations whereas the mean differences at the three stations are 3.6±2.2, 1.9±1.6 and 8.2±4.5 mm in x, y and z directions respectively. |
