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本文讨论了仰角频率扫描、方位机械扫描的三座标雷达数字法测高问题。全文分两部分: 第一部分介绍测高原理、方法与机能图。在原理上把频扫雷达的测高问题归结为对单个射频脉冲的瞬时频率测量问题,在方法上引进了新颖的多周期同步法。为了对回波信号能实时处理,采用了高速计数方案。第二部分对数字法测频的随机误差进行理论分析。文中分析了舍入误差噪声触发误差、剩余调频误差和触发延迟误差的影响及计算公式,同时将主要误差分量进行了综合。对应于不同的设计参数和回波信杂比,计算了相应的误差值
In this paper, the elevation of the elevation frequency scanning, azimuth mechanical scanning three-coordinate radar digital method to measure the issue. The full text is divided into two parts: The first part introduces the principle, method and function of height measurement. In principle, the altimetry problem of frequency sweeping radar can be attributed to the problem of instantaneous frequency measurement of a single radio frequency pulse, and a novel multi-period synchronization method is introduced in the method. In order to real-time echo signal processing, using a high-speed counting program. The second part analyzes the random error of digital frequency measurement. In this paper, the impact of the rounding error noise trigger error, the remaining frequency modulation error and the trigger delay error and the calculation formula are analyzed, and the main error components are summed up. Corresponding to different design parameters and echo signal to noise ratio, the corresponding error value is calculated