Estimation of terrain profiles remains very interested in the applications of remote sensoring. In particular, the high-resolution images obtained by the Airborne or satellite-borne synthetic aperture radars (SARs) were effectively used in conjunction with the applications of stereo techniques to perform the estimation. Many simulation models were thus developed and applied in the stereo techniques to process the optical images to estimate terrain profiles such as the digital elevation model (DEM) and digital terrain model (DTM). Some typical examples of technologies revealed in the literatures are summarized in the following. The works in proposed a new hybrid radar grammetric model as a function of terrain’s slope to establish the stereo DEM without the need of using any reference cartographic data. The accuracy was examined by using the topographic 1959 DEM, and Ice, Cloud, and land Elevation Satellite (ICESat) data. It was applied to ice-covered areas with 1-sigma 25- or 18-m accuracy over less than 30◦ or 5◦ slopes, respectively. In addition, a systematic elevation lowering of around 10 m computed between 1959 DEM and recent elevation data (R-2 and ICESat) could be due to icefield wastage over the last 50 years.