Ensuring globally the TanDEM-X height accuracy: Analysis of the reference data sets ICESat, SRTM and KGPS-tracks
Ensuring globally the TanDEM-X height accuracy: Analysis of the reference data sets ICESat, SRTM and KGPS-tracks
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确保全球 TanDEM-X 高度精度：分析参考数据集 ICESat、SRTM 和 KGPS 轨迹
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
A. Roth
中科院分区：
文献类型：
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作者：
M. Huber;B. Wessel;D. Kosmann;A. Felbier;V. Schwieger;M. Habermeyer;A. Wendleder;A. Roth
TanDEM-X使命将利用卫星合成孔径雷达干涉测量法得出全球数字高程模型。高程基准对于确保90%的数据达到10 m绝对高程和2 m相对高程的要求具有重要作用。本文分析了主要的高程参考数据集ICESat（用于DEM校准），SRTM（用于相位展开）和动态GPS跟踪（KGPS -用于DEM验证）的精度。对于ICESat数据，开发了可靠的质量测量方法。对于SRTM，提出了一个改进的版本，调整到可靠的ICESat数据，并提出了一个概念，用于收集和评估分米精度的动态GPS轨迹。
The TanDEM-X mission will derive a global digital elevation model (DEM) with satellite SAR interferometry. Height references play an important role to ensure the required height accuracy of 10m absolute and 2m relative for 90% of the data. In this paper the main height reference data sets ICESat (for DEM calibration), SRTM (for phase unwrapping) and kinematic GPS-Tracks (KGPS — for DEM verification) are analyzed regarding to their accuracy. For the ICESat data a reliable quality measure is developed. For SRTM an improved version adjusted to reliable ICESat data is presented and a concept for collecting and evaluating decimeter-precise kinematic GPS tracks is proposed.