Turkey sample on ALOS AW3D30 and SRTM C-BAND discontinuities analysis of global surface model

The Digital Surface Model (DYM) can be defined as a digital cartographic display with X, Y planimetric coordinates and Z height values of surface topography and (if any) objects (buildings, trees and human structure objects). These models are needed for hydrology applications, emergency management flight planning with 3D, mining, urban change analysis and many engineering applications. In line with this need, many DYM production techniques have been developed. With the high-tech satellite missions designed, global models are beginning to be developed that cover the entire world. LIDAR, photogrammetry, stereo satellite images and interferometric synthetic aperture radar (InSAR) techniques are used for the production of these three dimensional (3D) models. Compared to each other, these methods work with the LIDAR three-dimensional laser scanning technique and have higher accuracy than other methods. Because high-resolution aerial photographs take a lower order of magnitude than optical satellite images, a much stronger object can be extracted. However, optical cameras that operate with optical sensing logic and optical satellite sensors need solar energy because they cannot produce their own energy. Because of this, they work according to weather conditions and cannot shoot at night. In the InSAR technique, although the object extraction is less accurate than optical systems, data can be obtained at any time of the year without being influenced by night and day atmospheric conditions. In this study, global surface models consisting of SRTM satellites, which accomplish the modeling of the entire world (except for the polar regions) used in the InSAR method, and ALOS AW3D global surface models obtained from PRISM sensor images of the ALOS satellite developed by the Japanese Space Agency, the analysis of these sources of discontinuities is targeted. Towards this goal, the two satellite data from 30 m grid spacing DYM models are made of the height difference formed accuracy of analysis for all Turkey produced DYM produced.