摘要
L波段太阳射电爆发是导航系统不稳定的潜在影响因素,通过L波段内精密太阳射电流量的监测可以实时发现太阳射电爆发干扰导航事件,为此,云南天文台拟建立一个L波段多频点太阳射电监测系统。无线电环境的有效评估对于该监测系统观测数据的稳定获取至关重要。介绍了监测平台的无线电监测准备研究,通过对云南天文台L波段无线电环境进行100 h的测试,提出一种基于Simple Thresholding算法和CUSUM(Cumulative Sum)算法的改进阈值算法,遴选出介于北斗B1,B2和B3频点,全球定位系统L1和L2频点之间7个5 MHz无线电干扰较少的无线电通带,分别为1551~1555 MHz,1596~1600 MHz,1161~1165 MHz,1221~1225 MHz,1246~1250 MHz,1291~1295 MHz和1231~1235 MHz,其洁净率分别为98.329%,98.301%,98.315%,98.335%,98.224%,97.650%和98.260%,均符合太阳观测需求,为下一步接收机的设计和信号处理提供了依据。
L-band solar radio burst is a potential influencing factor of navigation system instability,through the L-band precision solar current volume monitoring events of solar burst interfering navigation can be found in real time,for this reason Yunnan Astronomical Observatory headquarters intend to establish an L-band multi-frequency point solar radio monitoring system.An effective assessment of the radio environment is essential for the stable access to observational data from the monitoring system.This paper introduces the radio monitoring readiness study of the monitoring platform,and conducts a 100-hour test of the L-band radio environment in the Fenghuangshan area of the Headquarters of the Yunnan Astronomical Observatory.In this paper,an algorithm based on the improved threshold of Simple Thresholding algorithm and CUSUM algorithm is proposed,and 7 radio passbands with less 5 MHz radio interference between the Beidou B1,B2,B3 frequency points,GPS L1 and L2 frequency points are selected,namely 1551-1555 MHz,1596-1600 MHz,1161-1165 MHz,1221-1225 MHz,respectively.1246-1250 MHz,1291-1295 MHz,1231-1235 MHz,its cleanliness rates are 98.329%,98.301%,98.315%,98.335%,98.224%,97.650%,98.260%,all of which meet the needs of solar observation.It provides a basis for the next step of receiver design and signal processing.
作者
杨航
董亮
何乐生
Yang Hang;Dong Liang;He Lesheng(Yunnan University,Kunming 650500,China;Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China)
出处
《天文研究与技术》
CSCD
2023年第1期31-40,共10页
Astronomical Research & Technology
基金
国家自然科学基金(U1631121,U2031133,U1831201,11941003)
云南省应用基础研究计划(2019FB009)
平方公里阵列射电望远镜(SKA)专项(2020SKA0110202)
昆明市对外(国际)合作基地项目(GHJD-2021022)资助
关键词
L波段
监测系统
无线电环境
阈值
洁净率
L-band
monitoring systems
radio environment
threshold
cleanliness rates
