本文叙述了零点型干涉仪的测角原理,数据转换及误差分析,并和 AZUSA一类基线平面固定的短基线干涉仪进行了比较。从原理上讲,零点型干涉仪有下列特点:它避免了较困难的基线测量问题,解决了低仰角工作时有效基线长度减短的问题,减少了天线引入的相位误差,减轻了对于伺服系统的要求,以及校零方便等等。 This paper describes the principle of zero angle interferometer measurement, data conversion and error analysis, and a class of AZUSA baseline fixed-baseline short-baseline interferometer were compared. In principle, the zero-point interferometer has the following features: it avoids the difficult baseline measurement problem, solves the problem of reducing the effective baseline length when working at low elevation angles, reduces the phase error introduced by the antenna, and reduces the influence on the servo system The requirements, as well as convenient zero calibration and so on.