针对非线性测量下的被动定位问题，建立了只测角定位模型。
In order to solve the problem of passive location with nonlinear measurement, a model of bearing-only measurement for location is established in this paper.
本文对断面索法和经纬仪测角交会法的定位误差进行了较详细的推导和分析，并指明了减小定位误差的途径。
The positioning error for cableway and theodolite methods is derived and analyzed in detail and the methods for reducing positioning error are pointed out.
在定位的基础上拟合脊柱中心线并建立测点集，应用MC算法输出三角网格模型，重建出脊柱中心曲面。
On the basis of the spine and fitting the centerline of spine, MC algorithm is used to output triangular mesh model to reconstruct the spine center surface.
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