Wide-band solar radio spectral monitoring in the Chinese Meridian Project (Phase II)
-
摘要: 为实现太阳射电的全波段观测,子午工程二期太阳-行星际监测链分系统将建设4套太阳射电频谱仪,覆盖十米波-米波-分米波-厘米波波段,将为太阳物理和空间天气研究和业务提供可靠的数据支撑. 文中介绍了全波段射电频谱仪的系统构成和主要技术参数,对数据产品和定标过程进行了描述.Abstract: To achieve full-band observation of solar radio emissions, the sun-planetary interstellar monitoring chain subsystem of the Chinese Meridian Project (Phase II) will construct four sets of solar radio spectrometers covering the decimeter, meter, decameter, and centimeter wavebands, providing reliable data support for solar physics and space weather research and operations. The system configuration and main technical parameters of the full-band radio spectrometer are introduced, and the data products and calibration process described.
-
Key words:
- the Chinese Meridian Project /
- solar radio /
- spectrum monitoring
-
表 1 宽波段射电频谱仪组成
Table 1. Instruments of wide band radio spectrometer
序号 名称 观测频段 站址(经纬度) 计划完成时间 1 米波十米波射电日像仪 30~400 MHz 内蒙古锡林郭勒明安图Lon: E115.25, Lat: N42.71, Alt: 1365 m 2023年11月 2 米波太阳射电频谱仪 90~300 MHz 山东威海荣成槎山Lon: E122.31, Lat: N36.84, Alt: 53 m 2023年11月 3 分米波太阳射电频谱仪 400~2000 MHz 内蒙古锡林郭勒明安图Lon: E115.25, Lat: N42.71, Alt: 1365 m 2023年11月 4 厘米波太阳射电频谱仪 2000~15000 MHz 内蒙古锡林郭勒明安图Lon: E115.25, Lat: N42.71, Alt: 1365 m 2023年11月 表 2 宽波段射电频谱仪主要技术指标
Table 2. Main parameters of wide band radio spectrometer
序号 频率范围 频率分辨率 灵敏度 动态范围 极化方式 每日可观测时间 时间分辨率 1 30~400 MHz 1 MHz@30~110 MHz 5 MHz@110~400 MHz ≤1 sfu(积分25 ms) ≥45 dB 双线极化 ≥8小时 ≤100 ms(全频带) 2 90~300 MHz 100 kHz 1 sfu(积分10 ms) ≥60 dB 双线极化 ≥8小时 ≤1 ms(全频带) 3 400 MHz~2 GHz ≤1 MHz 1 sfu (积分4 ms) ≥45 dB 双圆极化 ≥8小时 ≤4 ms(全频带) 4 2~15 GHz ≤2 MHz(2~6 GHz) ≤5 MHz(6~12 GHz) ≤10 MHz(12~15 GHz) 2 sfu (积分1 ms) ≥45 dB 双圆极化 ≥8小时 ≤5 ms(全频带) -
[1] 山东大学子午工程团队. 2022. 子午工程II期威海台荣成站“米波太阳射电频谱仪”完成系统本地联调并获得初光观测[EB/OL]. https://iss.wh.sdu.edu.cn/info/1094/2822.htm. [2] Shang Z Q, Xu K, Liu Y, et al. 2022. A broadband solar radio dynamic spectrometer working in the millimeter-wave band[J]. The Astrophysical Journal Supplement Series, 258(2): 25. doi: 10.3847/1538-4365/ac4257 [3] 谭宝林, 程俊, 谭程明, 等. 2018. 尖峰爆发标度律及其对新一代太阳射电望远镜参数的约束[J]. 天文学报, 59(4): 37 doi: 10.15940/j.cnki.0001-5245.2018.04.006Tan B L, Cheng J, Tan C M. 2018. Scaling-laws of radio spike bursts and their constraints on new solar radio telescopes[J]. Acta Astronomica Sinica, 59(4): 37 (in Chinese). doi: 10.15940/j.cnki.0001-5245.2018.04.006 [4] 谭程明. 2002. 太阳射电爆发的定标和低频射电CME模型[D]. 北京: 北京师范大学.Tan C M. 2002. Calibration of solar radio bursts and low-frequency radio CME models[D]. Beijing: Beijing Normal University (in Chinese). [5] Tan C, Yan Y, Tan B, Xu G. 2009. Calibration of the solar radio spectrometer[J]. Science in China Series G Physics Mechanics and Astronomy, 52(11): 1760-1764. doi: 10.1007/s11433-009-0229-4 [6] 谭程明, 颜毅华, 谭宝林, 等. 2011. 太阳射电频谱观测数据分析系统方案设计[J]. 天文研究与技术, 8(2): 100-107 doi: 10.14005/j.cnki.issn1672-7673.2011.02.007Tan C M, Yan Y H, Tan B L, et al. 2011. Design of a data processing system for solar radio spectral observations[J]. Astronomical Research & Technology, 8(2): 100-107 (in Chinese). doi: 10.14005/j.cnki.issn1672-7673.2011.02.007 [7] Team of Meridian Project. 2017. Proposal of Meridian Project (Phase II) [R]. Beijing: National Space Science Center of CAS, et al (in Chinese). [8] Team of Meridian Project of Shandong University. 2022. The metric solar radio spectrometer at Rongcheng station of Weihai has completed system test and obtained the first light observation [EB/OL]. https://iss.wh.sdu.edu.cn/info/1094/2822.htm (in Chinese). [9] Yan F-B, Liu Y, Xu K, et al. 2020. A broadband digital receiving system with large dynamic range for solar radio observation[J]. Research in Astronomy and Astrophysics, 20(9): 358-366. [10] 子午工程项目团队. 2017.子午工程二期建议书[R]. 北京: 中国科学院国家空间科学中心等. -