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测绘学报  2015 

高度计测距精度对沿轨迹重力异常反演的影响

DOI: 10.11947/j.AGCS.2015.20140022, PP. 363-369

Keywords: 卫星测高,雷达高度计测距精度,沿轨迹重力异常,空间分辨率

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Abstract:

应用求解沿轨迹重力异常的垂线偏差法以及求解空间分辨率的交叉谱分析法,建立了高度计测距精度与沿轨迹重力异常反演精度以及空间分辨率的关联性模型.首先依据卫星测高原理,给出了沿轨迹重力异常的误差传播公式,然后以此为基础通过推导交叉谱分析中一致性系数与信噪比的数学表达式,建立了高度计测距精度与空间分辨率的解析关系.数值仿真结果表明雷达高度计测距精度与沿轨迹重力异常反演精度成正比关系,与空间分辨率成幂函数关系,即高度计测距精度提高m倍,沿轨迹重力异常反演精度提高m倍,全球海域平均空间分辨率提高m0.4644倍.将数值仿真结果与相关文献中对实际测高数据的处理结果进行比较,验证了理论分析及模型的正确性.

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