Meng Zhijun, Yang Jun, Guo Xiye, Zhou Yongbin
College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China.
Sensors (Basel). 2017 Jun 13;17(6):1369. doi: 10.3390/s17061369.
Global Navigation Satellite System performance can be significantly enhanced by introducing inter-satellite links (ISLs) in navigation constellation. The improvement in position, velocity, and time accuracy as well as the realization of autonomous functions requires ISL distance measurement data as the original input. To build a high-performance ISL, the ranging consistency among navigation satellites is an urgent problem to be solved. In this study, we focus on the variation in the ranging delay caused by the sensitivity of the ISL payload equipment to the ambient temperature in space and propose a simple and low-power temperature-sensing ranging compensation sensor suitable for onboard equipment. The experimental results show that, after the temperature-sensing ranging compensation of the ISL payload equipment, the ranging consistency becomes less than 0.2 ns when the temperature change is 90 °C.
通过在导航星座中引入星间链路（ISL），全球导航卫星系统的性能可以得到显著提升。位置、速度和时间精度的提高以及自主功能的实现需要ISL距离测量数据作为原始输入。为构建高性能的ISL，导航卫星之间的测距一致性是一个亟待解决的问题。在本研究中，我们关注星间链路有效载荷设备对空间环境温度的敏感性所导致的测距延迟变化，并提出一种适用于机载设备的简单且低功耗的温度传感测距补偿传感器。实验结果表明，对星间链路有效载荷设备进行温度传感测距补偿后，当温度变化90°C时，测距一致性小于0.2纳秒。
