The paper summarizes the experiences with the operation of the piNAV GPS receiver in a 1U unstabilized CubeSat operated on LEO orbit. piNAV L1 is a GPS receiver developed by an author for small satellite missions. The receiver is equipped with the 15 GPS L1 C/A channels and acquisition accelerator that shortens the cold start of the receiver on LEO to 65 s. The typical power consumption is 120 mW. Lucky-7 is a private 1U technological CubeSat with power budget 1 W that operates on the quasisynchronous polar orbit at altitude 520 km. One of its scientific missions is to test the operation of GPS. The space experiments proved the successful operation of the GPS receiver. The position information was available for approximately 80% of the time, where the position outage was caused by a satellite rotation and relatively long navigation signal reacquisition. The experimental data proved that the position availability can be improved by a higher-performance signal acquisition engine.

中文翻译：

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在不稳定CubeSat中使用GPS的经验

本文总结了在LEO轨道上运行的1U不稳定CubeSat中piNAV GPS接收器的运行经验。piNAV L1是一位作者开发的GPS接收机，用于小型卫星任务。接收器配备了15个GPS L1 C / A通道和采集加速器，可将接收器在LEO上的冷启动时间缩短至65 s。典型功耗为120 mW。Lucky-7是一款私有1U技术CubeSat，其功率预算为1 W，在520 km的准同步极轨道上运行。其科学任务之一是测试GPS的运行。太空实验证明了GPS接收机的成功运行。大约80％的时间都可以获取位置信息，由于卫星旋转和重新获得相对较长的导航信号而导致位置中断。实验数据证明，高性能的信号采集引擎可以改善位置可用性。