This data set focus on the Greate Snow Mountain Region in the middle section of Qilian Mountains. The data content is digital elevation model of Daxueshan area in 2014, and the data format is GeoTIFF format. The dataset contains the 2014 Daxueshan digital elevation model GeoTIFF file, which is a single band file, and contains the 2014 Daxueshan digital elevation model.
|collect time||2014/01/01 - 2014/12/31|
|collect place||Greate Snow Mountain|
|data size||92.2 MB|
Satellite image pair data of TanDEM-X and TerraSAR-X sister radars of ESA in 2014.
Gamma software is used for preprocessing and interferometry (based on the data of 2014 TanDEM-X / TerraSAR-X radar satellite remote sensing), and then the multi-functional DEM corrector software is used to repeatedly register and correct the DEM with the reference to the 30 m resolution SRTM data in 2000, so as to ensure that it has a unified elevation datum and minimum coordinate deviation with other DEM data in the region ICESat satellite laser altimetry data is used to evaluate the accuracy of the results.
By using the platform equipped with TerraSAR-X and TanDEM-X sensors, the complex data (including amplitude and phase information) of the same ground object are obtained at the same time to form an interference pair. After accurate registration, complex interferograms can be obtained by conjugate multiplication of complex images. Based on the geometric relationship among flight platform, beam view and baseline, the phase information in complex interferogram is unwrapped to obtain the ground elevation information. The absolute accuracy in the vertical direction is better than 10 m, and the relative accuracy is 4 m at & gt; 20% and 2 m at & lt; 20%.
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