During the last decade, the techniques to generate digital elevation models (DEM) from SAR interferometry have been demonstrated and refined to a quasi-operational status using data from the ERS tandem mission. With this experience and an improved single-pass system concept, data from the Shuttle Radar Topography Mission (SRTM) acquired in 2000 have been used to produce a global DEM with unprec...

– In February 2000 the Shuttle Radar Topography Mission (SRTM) was flown on board the space shuttle Endeavour. The aim of the mission was to survey about sixty percent of the complete landmasses of the Earth’s surface [2]. During the mission US C-band antenna and a German/Italian Xband antenna were installed on board the shuttle. The main result of the mission will be a three-dimensional digita...

[1] We assess the accuracy and resolution of topography data provided by the Shuttle Radar Topography Mission (SRTM) through spectral comparisons with the National Elevation Dataset (NED) and a high-resolution laser data set of the 1999 Hector Mine earthquake rupture. We find that SRTM and the NED are coherent for wavelengths greater than 200 m, however the spatial resolution of the NED data is...

A public computing project named Terrain@home, is built on BOINC for extracting terrain features from global scope DEM data. Shuttle Radar Topography Mission (SRTM), which is a near global scope database of high accuracy elevation data, is selected as test data for Terrain@home. Conventional algorithms for terrain features auto extracting for example slope gradient, delineating drainage network...

The digital elevation model derived from SAR Interferometry is prone to atmospheric, penetration into soil medium, system noise and decorrelation errors. Eight ASAR images are selected for this study which have unique data set forming 7 InSAR pairs with single master image. It is expected that all the DEMs should have the same elevation values spatially with in the noise limits. However, they d...

An approach to DEM fusion was developed to improve the overall accuracy of DEMs and applied to two public products: Shuttle Radar Topographic Mission (SRTM) DEM and Advanced Spaceborne Thermal Emission and Reflection (ASTER) DEM. The relative ASTER DEM was co-registered to the SRTM coordinates and converted to the near absolute DEM by shifting the histogram to the average elevation of the SRTM ...

Several studies have indicated that glaciers in the Qinghai-Tibet plateau are thinning, resulting in reduced water supplies to major rivers such as the Yangtze, Yellow, Lancang, Indus, Ganges, Brahmaputra in China, and south Asia. Three rivers in the upstream of Yangtze River originate from glaciers around the Geladandong snow mountain group in central Tibet. Here we used elevation observations...

This study evaluates the accuracy of digital elevation models (DEMs) produced from Cartosat-1 data. The Cartosat-1 satellite, launched by the Indian Space Research Organization (ISRO) in May 2005, carries two panchromatic cameras capable of acquiring stereoscopic data along the orbital track. These data provide the potential to produce high-quality DEMs for virtually any location on the Earth’s...

Abstract. Accurate estimates of regional ice thickness, which are generally produced by ice-thickness inversion models, crucial for assessments available freshwater resources and sea level rise. A digital elevation model (DEM) derived from surface topography glaciers is a primary data source such models. However, the scarce in situ measurements glacier limit evaluation DEM uncertainty. Hence in...

Global warming is melting glaciers. Changes in mountain glaciers have a tremendous impact on human life. Regular identification and extraction of from satellite images are necessary. However, when studying glaciers, materials surrounding the glacier high spectral similarity to easily misclassified process. Therefore, this study extraction, we used an improved U-Net model (a channel-attention U-...