论文标题
麦吉尔北极研究站的射频干扰
Radio-Frequency Interference at the McGill Arctic Research Station
论文作者
论文摘要
红移21厘米观测的感兴趣频率受陆射频干扰（RFI）的严重影响。我们将麦吉尔北极研究站（MARS）识别为新的RFI-Quiet站点，并使用122个小时的数据报告了RFI的占用率，该数据是使用原型天线站进行的122个小时的数据，该数据用于从二极管中获取无线电观测的一系列长基线天线。使用针对火星数据量身定制的RFI标志过程，我们发现RFI的总占用率为1.8％，平均为20-125 MHz。特别是，发现FM广播乐队（88-108 MHz）的RFI占用率最高为1.6％。数据是在北极夏季进行的，当时电离层的降解和主动研究基础有助于RFI增加。因此，这里引用的结果代表了火星的最大级RFI环境。
The frequencies of interest for redshifted 21 cm observations are heavily affected by terrestrial radio-frequency interference (RFI). We identify the McGill Arctic Research Station (MARS) as a new RFI-quiet site and report its RFI occupancy using 122 hours of data taken with a prototype antenna station developed for the Array of Long-Baseline Antennas for Taking Radio Observations from the Sub-Antarctic. Using an RFI flagging process tailored to the MARS data, we find an overall RFI occupancy of 1.8% averaged over 20-125 MHz. In particular, the FM broadcast band (88-108 MHz) is found to have an RFI occupancy of at most 1.6%. The data were taken during the Arctic summer, when degraded ionospheric conditions and an active research base contributed to increased RFI. The results quoted here therefore represent the maximum-level RFI environment at MARS.
