The first satellite which can flash Morse code on orbit is introduced in this paper. The design of the system includes light energy estimation, attitude mode design, elevation angle analysis and flash time design. It is a 100 kg satellite with two LED arrays on 547 km. When it flashes, the satellite points to the observation location. The LED rays flash as the rule of Morse code. The satellite was sent to the orbit in Dec 2018 and the test of flash was completed within one month after then. The photo taken by star sensor can compare the apparent magnitude by the gray level. The results of the analysis show that the satellite can achieve 0 apparent magnitude, which is consistent with the design of the system. As a meaningful scientific experiment, “Ladybeetle-1” links space technology with popular science education and also provides a reference for space applications.

本文介绍了第一颗可以在轨道上闪烁莫尔斯电码的卫星。该系统的设计包括光能估计，姿态模式设计，仰角分析和闪光时间设计。这是一颗重100公斤的卫星，在547公里处有两个LED阵列。闪烁时，卫星指向观察位置。LED灯按照摩尔斯电码规则闪烁。卫星于2018年12月被送入轨道，并在此后一个月内完成了闪光测试。星型传感器拍摄的照片可以通过灰度比较视在幅度。分析结果表明，该卫星可以达到0视在量级，这与系统的设计是一致的。作为有意义的科学实验，