一种面向空间应用的激光测距方案设计与实验

针对空间应用背景对激光测距系统宽测程、高精度、实时测量的要求，使用相位式激光测距法中分散的直接法设计了一种激光测距方案，其理论测程可以达到10 km，测距精度可以达到0.1m。对激光器和窄带滤光片提出了技术指标要求，对雪崩光电二极管（APD）进行了选型，并通过对空间环境背景噪声的分析和对空间非合作目标测程方程的分析验证了技术指标选择和APD 选型的合理性。实验结果表明:该系统最大测距误差为8.71 cm，符合测距精度优于0.1 m的技术指标要求，同时具有较高的动态性能，测距时间不超过1 ms。此外，系统具有较小的整体功率和质量，分别为13.29W 和693 g，可作为天基应用的有效载荷。

Design and experiment of a laser ranging scheme for aerospace applications

In response to the requirements of wide measurement range, high accuracy, real-time measurement to laser ranging system in aerospace applications, a laser ranging scheme was designed by using dispersed direct phase ranging method. The theoretical measurement range can reach 10 km and the degree of ranging accuracy is within 0.1 m. The laser system, narrow-band filter and the APD photodiode were particularly required by analyzing the space background noise (including space radiation, earth radiation and solar radiation) and range equation for non-cooperative space targets. The experimental results indicate that the maximum ranging error of the system is 8.71 cm, and the system has high dynamic performance with the ranging time less than 1 ms. Moreover, the power consumption and quality of the prototype is small(13.29W and 693 g respectively), which makes the system a suitable payload for space- based applications.