ASTER影像基于卫星轨道和姿态的绝对定位模型.pdfVIP

ASTER 影像基于卫星轨道和姿态的 绝对定位模型 摘要：ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer)影像具有较高的地面分辨率，能在 可见光、近红外、短波红外、热红外的光谱范围内的 14 个通道内成像，并且具有立体观测能力，因此 ASTER 影像具有广 泛的用途，能用于陆地、海洋、冰川、大气等方面的研究。影像定位技术是摄影测量学的核心理论基础之一，是实现从影像 坐标到地面坐标转化的关键环节。对遥感图像的应用而言，确定目标位置是非常重要的。本文建立了 ASTER 影像的定位模 型，并以此模型为基础进行ASTER 影像定位误差的定量分析，实现在没有控制点和稀少(小于4 个)控制点的情况下对 ASTER L-1A 级影像进行定位。 关键词：ASTER 定位模型 精度评价 The Geolocation Model for ASTER Image Based on Satellite Orbit and Attitude ASTER(Advanced Spaceborne Thermal Emission and Reflection Radiometer) consists of three different subsystems: the Visible and Near-infrared (VNIR) has three bands with a spatial resolution of 15 m, and an additional backward telescope for stereo; the Shortwave Infrared (SWIR) has 6 bands with a spatial resolution of 30 m; and the Thermal Infrared (TIR) has 5 bands with a spatial resolution of 90 m．ASTER image can be applied in many domains such as land, sea, glacier, atmosphere and so on.Image geolocation technology is the core methodology of photogrammetry, and is the key step of coordinate transformation from image coordinate system to earth coordinate system．The geolocation is very important for the application of remote sensing image, because the positional parameters are basic information in the applications of remote sensing such as mapping and surveying, disaster monitoring, resource exploring, changing detection.The Geolocation model of ASTER image was established in this paper, and the geolocation error analysis was implemented based on the geolocation model． 卫星轨道姿态模型是由 Toutin 博士提出的严格数学模 ⎡ cosθyaw sinθyaw 0⎤⎡cosθpitch 0 −sinθpitch ⎤ 型。它能补偿传感器几何畸变、卫星轨道姿态变化、地球曲 ⎢ ⎥⎢ ⎥ M ≡ −sinθ cosθ 0 0 1 0 率及旋转、地形起伏等造成的影像畸变。此模型可以应用在