中文摘要：

由于传感器自身特性的限制，或在干扰的情况下，获得的目标信息有不完全的情况，为了充分利用获得不全的目标信息，提出了对目标信息进行分坐标处理的思路，给出了余切关系定理，总结和比较了其它定理和推论的应用方法，推导出许多有用的代数公式，从理论原理上得到了纯方位角、纯仰角、纯距离信息处理原理，较好地解决了方位角、仰角、距离等信息融合问题，使用这一原理方法向工程实现跨出了一大步。对比几个类似图形的几何定理及推论，归纳与总结这些代数关系，具有重要的理论意义。

英文摘要：

Because of sensor own characteristic limit, or in interference situation, the target information obtained is incomplete, in order to take full advantage of those incomplete information, an idea of target coordinates information - processing is presented. The cotangent relations theorem is given, and other theorems and the deduction applica- tion methods are summarized and compared, many useful algebraic formulas are inferred, pure information process- ~ng principles, are obtained, on azimuth, pure elevation angle and pure distance from the theory principle, then the target tracking problems are solved. Using this principle method means taking a great stride in realizing the in- formation fusion project. Contrasting the geometry theorems and deductions of several similar graphs, summarizing these algebraic relations and applying both of them to the air defense information fusion are of important theoretic significance.