针对到达时间差测量定位方法，将其应用于舰载机着舰时的定位。分析目前几种主要距离差定位算法，根据舰载机着舰的实际情况和限制，主要研究球面相交定位算法(SX)。针对SX算法计算量大以及方程系数矩阵可能出现病态等问题，提出基于线性化方程的算法。在SX算法的基础上增加一个距离差测量方程，将非线性方程转换为线性方程求解。仿真结果表明，该定位算法相比SX算法具有更高精度且计算量小。

The positioning method of TDOA (Time Differences of Arrival) is applied to the positioning of aircraft in deck landing. Several major kinds of TDOA algorithms are analyzed, and the Spherical Intersection (SX) algorithm is chosen based on the practical situation and the limits of shipboard aircraft landing. Considering that SX algorithm has large computation burden, the equation coefficient matrix may be ill-conditioned and so on, we propose an algorithm based on linearization equation. By adding a range difference equation on the foundation of SX algorithm, the nonlinear equation is transformed into a linear equation. The simulation results indicate that : compared with SX algorithm, this algorithm has higher accuracy and smaller computation burden.