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Sensitivity analysis of dual-satellite geolocation

机译:双卫星地理定位的灵敏度分析

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摘要

An analytic solution is presented for the linearized estimation problem arising from the dual-satellite geolocation of the source of a narrowband signal using time- and frequency-difference-of-arrival (TDOA and FDOA, respectively) observations and an altitude constraint. This solution is used to analyze the covariance matrix of the resultant source location estimate, along with the sensitivity of its mean to errors in the presumed source altitude and velocity, and the measured or predicted positions and velocities of the satellites. Following the practice of differential Global Positioning System, the technique of differential calibration is used to reduce or eliminate various sources of solution bias which would otherwise require tight, and consequently expensive, individual calibration
机译:对于线性估计问题,提出了一种解析解决方案,该问题是使用到达时间和频率差(分别为TDOA和FDOA)观测值和高度限制条件对窄带信号源进行双卫星地理定位引起的。该解决方案用于分析所得源位置估计的协方差矩阵,以及其均值对假定源高度和速度以及测量或预测的卫星位置和速度中的误差的敏感性。遵循差分全球定位系统的实践,差分校准技术可用于减少或消除各种解决方案偏差源,否则将需要严格且因此昂贵的单独校准

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