| 摘要: |
| 以天山地区为研究区域，利用干涉合成孔径雷达干涉测量技术（InSAR）分别对TanDEM-X和ERS获取的数据进行干涉处理生成数字高程模型（DEM），结合SRTM DEM和我国1∶5万数字高程模型标准，对所获取的DEM的精度进行比较和分析.结果显示，由于实验区域地形复杂、高程变化剧烈且植被茂密，2组数据生成的DEM与SRTM DEM之间的整体差值偏大，标准差分别为11.55 m和16.74 m，但TanDEM-X数据获取的DEM精度更高.结果表明，在地形复杂区域TanDEM-X数据能够监测到C波段数据所不能监测到的细节，其生成DEM的结果较ERS数据具有明显优势. |
| 关键词: DEM ERS 合成孔径雷达干涉测量 数字高程模型 |
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| Study of InSAR-derived DEMs generated with TanDEM-X and ERS Tandem Data |
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| Abstract: |
| Tianshan is selected as the study areas. Based on the aynthetic aperture radar interferometry technology, two Digital Elevation Models (DEM) were generated by processing the data obtained from radar satellite TanDEM-X and ERS respectively. Then the SRTM DEM was combined with 1∶5 million digital elevation model standard of our country, the accuracy of the two DEMs was compared and analyzed. Because of the complexity of the study area, the dramatic changes of the height and the dense vegetations, the overall difference between the two generated DEMs and SRTM DEM is large, the standard deviation is 11.55 m and 16.74 m respectively. However, it’s obvious that the accuracy of DEM generated from TanDEM-X data is higher. The conclusion is that the data obtained by TanDEM-X has obvious advantages over the ERS in terms of extraction DEM in complex topography areas. |
| Key words: DEM ERS aynthetic aperture radar interferometry digital elevation model |
