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中文摘要：
研究了基于测角的被动定位方法，分析了双站测角定位系统的测距精度，针对双站测角定位精度较低且在一些目标方位上出现的几何方位影响精度（Geometric Dilution of Precision，GDOP）问题，结合机载平台的结构特点，提出了一种适用于单架飞机的红外被动测角定位方法。该方法按照正交方式将四个测量站装载到机载平台上，构成两个正交的测角定位系统，通过恰当选取两个系统的定位信息，可有效克服GDOP问题。最后进行了仿真验证，结果表明该方法能够有效克服GDOP问题，提高定位精度。
英文摘要：
A method for passive location based on the triangulation principle was studied. By analyzing the ranging precision of dual-station triangulating location system, it proved to be with low precision, and for some target orientations the precision in the target location was completely lost, known as Geometric Dilution of Precision. Combined with the character of the airborne platform, an infrared passive triangulating positioning method applying to a single aircraft was proposed. Four stations were installed in an orthogonal manner on the platform, which constituted two orthogonal triangulation systems. The GDOP can be resolved by selecting the positioning data of the two triangulation systems appropriately. Finally, simulations were also made, whose results show that the method can eliminate the GDOP effect and increase the precision of location.
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