摘要
为了有效克服利用传统低轨星座卫星定位的缺点,提出一种星链机会信号定位方法:通过实测数据对星链导频信号进行分析;利用星链11.325GHz和11.575GHz频点信号实现星链双频导频信号瞬时多普勒频率提取,并建立瞬时多普勒定位数学模型。实验结果表明:在观测时长小于5 min的情况下,可以实现优于15 m的二维定位精度;该方法在保持同等定位精度的情况下可有效降低观测时长,提高定位效率。
In order to efficiently overcome the shortcomings of traditional low-orbit constellation satellite positioning,the paper proposed a positioning method based on starlink signal of opportunity:the characteristics of starlink signal was analyzed;the instantaneous Doppler frequency extraction of starlink dual-frequency pilot signal was realized by using the frequency point signals of starlink 11.325 GHz and 11.575GHz;and the mathematical model of instantaneous Doppler positioning was established.Experimental result showed that the two dimensional positioning accuracy could be better than 15 m within the observation time of less than 5 min;the proposed method could effectively reduce the observation time and improve the positioning efficiency while maintaining the same positioning accuracy.
作者
秦红磊
张宇
QIN Honglei;ZHANG Yu(School of Electronic and Information Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100083,China)
出处
《导航定位学报》
CSCD
2023年第1期67-73,共7页
Journal of Navigation and Positioning
关键词
机会信号
低轨卫星
星链
天基
瞬时多普勒定位
signal of opportunity
low Earth orbit satellite
starlink
space-based
instantaneous Doppler positioning
