| Summary: | The article presents the method of developing a 30-m spatial resolution DSMDSM based on integration of height data from InSAR SRTMSRTMSRTMSRTM mission and the stereoscopic measurements of ASTERSTER satellite images. The method involves the use of 30-m ASTERSTER model for refinement of a 90-m interferometric SRTMSRTMSRTMSRTM model. ASTERSTER model has a higher resolution, but it can contain local systematic errors (due to incorrect image matching in areas of the regular pattern of agricultural parcels). The differential model is generated and next smoothed with weighted averaging filter. Such a model is used to correct the ASTERSTER DSMDSM. The method was tested in the area of 31,000 square kilometers located in central Poland. A visual and precise evaluation of the output model relative to source data was performed with the use of terrain GPS profiles and the detailed DSMDSM based on airborne laser scanning (ALS) data for three types of land cover. The accuracy of models was assessed by RMSERMSE calculated from a difference between point heights interpolated from the model and the same height points taken from terrain GPS profiles. Also the standard deviation of height difference between analyzed and ALSLS DSMDSMDSM was analyzed. In the new integrated DSMDSMDSM, more details were noticed compared to the SRTM SRTM SRTM SRTM SRTM DSMDSM. The height errors typical for ASTERSTER model were compensated. The vertical accuracy of the developed DSMDSM is close to SRTMSRTMSRTMSRTM data.[b]Keywords[/b]: interferometry, SRTMSRTMSRTMSRTM, Digital Elevation Model, accuracy, analysis
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