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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >High-Resolution SAR Radargrammetry: A First Application With COSMO-SkyMed SpotLight Imagery
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High-Resolution SAR Radargrammetry: A First Application With COSMO-SkyMed SpotLight Imagery

机译：高分辨率SAR雷达图测量：COSMO-SkyMed SpotLight影像的首次应用

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The availability of new high-resolution radar spaceborne sensors offers new interesting potentialities for the acquisition of data useful for the generation of Digital Surface Models (DSMs). Two different approaches may be used to generate DSMs from Synthetic Aperture Radar (SAR) data: the interferometric and the radargrammetric one. At present, the importance of the radargrammetric approach is rapidly growing due to the new high-resolution imagery [up to 1 m Ground Sample Distance (GSD)] which can be acquired by COSMO-SkyMed, TerraSAR-X and RADARSAT-2 in SpotLight mode. The defined and implemented model is related to COSMO- SkyMed SpotLight imagery in zero-Doppler geometry; it performs a 3-D orientation based on two range and two zero-Doppler equations, allowing for the least squares estimation of some calibration parameters, related to satellite position and velocity and to the range measure. The model has been implemented in SISAR (Software per Immagini Satellitari ad Alta Risoluzione), a scientific software developed at the Geodesy and Geomatic Institute of the University of Rome “La Sapienza”. Starting from this model, based on a geometric reconstruction, also a tool for the Rational Polynomial Coefficients (RPCs) generations has been implemented. To test the effectiveness of the new model, a stereo pair over the test sites of Merano (Northern Italy) has been orientated using the rigorous model and the RPCs one, and first results of radargrammetric DSM generation are presented; they display the possibility to reach an overall average accuracy of 3.5 m.
机译：新的高分辨率雷达星载传感器的可用性为获取有用的数据提供了新的有趣潜力，这些数据对于生成数字表面模型（DSM）很有用。可以使用两种不同的方法从合成孔径雷达（SAR）数据生成DSM：干涉法和雷达法。目前，由于新的高分辨率影像[高达1 m地面采样距离（GSD）]，雷达测量方法的重要性正在迅速提高，可以通过COSMO-SkyMed，TerraSAR-X和RADARSAT-2在SpotLight中获取模式。定义和实现的模型与零多普勒几何中的COSMO-SkyMed SpotLight影像有关；它基于两个距离和两个零多普勒方程执行3-D定向，从而可以对与卫星位置和速度以及距离测量相关的某些校准参数进行最小二乘估计。该模型已在SISAR中实现，该软件是由罗马大学“ La Sapienza”大地测量学与地球动力学研究所开发的科学软件，SISAR（Immagini Satellitari ad Alta Risoluzione的软件）。从此模型开始，基于几何重构，还实现了用于生成有理多项式系数（RPC）的工具。为了测试新模型的有效性，已经使用严格的模型和RPCs对梅拉诺（意大利北部）的测试地点的立体声对进行了定向，并提出了雷达测量DSM生成的第一批结果。它们显示出达到3.5 m的整体平均精度的可能性。

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