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Radio frequency interference in solar monitoring using CALLISTO
New Astronomy Reviews ( IF 6 ) Pub Date : 2015-08-01 , DOI: 10.1016/j.newar.2015.05.001
Zamri Zainal Abidin , Norsuzian Mohd Anim , Zety Sharizat Hamidi , Christian Monstein , Zainol Abidin Ibrahim , Roslan Umar , Nur Nafhatun Md Shariff , Nabilah Ramli , Noor Aqma Iryani Aziz , Indriani Sukma

Abstract Compact Astronomical Low-frequency, Low-cost Instrument for Spectroscopy in Transportable Observatories (CALLISTO) is a global network of spectrometer system with the purpose to observe the Sun's activities. There are 37 stations (using 68 instruments) forming this network from more than 96 countries. We investigate the radio frequency interference (RFI) affecting CALLISTO at these stations. We found that the RFI severely affecting CALLISTO within radio astronomical windows below 870 MHz are in the ranges of 80–110 MHz and 460–500 MHz. We also found that all stations are relatively free from RFI at 270–290 MHz. We investigate the general effect of RFI on detection of solar bursts. We considered type III solar bursts on 10th May, 28th June, 6th July and 8th July, type II on 24th April and type IV on 9th March (all in 2012) in order to measure the percentage of RFI level during solar burst in general. The SNR of the strong solar bursts in for these detections have maxima reaching up to 46.20 (for 6th July).

中文翻译:

使用 CALLISTO 进行太阳能监测中的射频干扰

摘要 便携式天文台小型天文低频、低成本光谱仪(CALLISTO)是一个全球性的光谱仪系统网络,旨在观测太阳活动。来自超过 96 个国家的 37 个台站(使用 68 台仪器)形成了这个网络。我们调查了影响这些电台的 CALLISTO 的射频干扰 (RFI)。我们发现在低于 870 MHz 的射电天文窗口内严重影响 CALLISTO 的 RFI 在 80-110 MHz 和 460-500 MHz 范围内。我们还发现,所有电台在 270–290 MHz 频率下都相对不受 RFI 影响。我们研究了 RFI 对太阳爆发探测的一般影响。我们考虑了 5 月 10 日、6 月 28 日、7 月 6 日和 7 月 8 日的 III 型太阳爆发,4 月 24 日的 II 型和 3 月 9 日的 IV 型(均在 2012 年),以测量一般太阳爆发期间 RFI 水平的百分比。这些探测中强太阳爆发的信噪比最大值达到 46.20(7 月 6 日)。
更新日期:2015-08-01
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