本文针对民航机场地面接收系统和航路/航线的对空监视系统接收机载应答机发出的A、C模式应答代码的区分问题,提出了一种结合民航应用实际的识别方法。该方法在分析机载应答机发出的A、C模式应答信息基本格式的基础上,结合A、C模式的物理意义和应用特点,给出了初步识别结果,在此基础上,根据机场附近和航路上A、C模式的编号特点,以及中国民航规定的飞行高度层等实际情况,对收到的应答信号做进一步的识别。通过现场试验,本文方法解决了A、C模式应答代码的识别问题,提高了A、C模式应答代码识别的准确性和可靠性,在民航多点定位监视等领域具有重要应用价值。
Aiming at the problem of the responsive signal's identification of airborne mode A/C transponder for civil airport ground receiving station and aviation surveillance system,a method that has a great practical value in the field of civil-aviation application is presented.This method gives the initial results based on the responsive signal's basic structure that generated by the airborne transponder and the responsive signal's physical meaning of mode A/C.On the basis of the initial results,some actual situations,such as the responsive signal's encoding rules of mode A/C for civil airport and aviation route and the flight level that generated by civil aviation of china,are used to identify the responsive signal.Field test results indicate that this paper propose a targeted solution to the responsive signal's identification of mode A/C.This technique improves accuracy and reliability of the responsive signal's identification for mode A/C.And it has a great value in civil-aviation surveillance application,such as multilateration.