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arXiv 2302.14575astro-ph.IM
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测量由射频干扰引起的数据丢失

Measuring Data Loss resulting from Radio Frequency Interference

Willem A. Baan, Axel Jessner, Jaap Steenge

摘要:

本文介绍了一种观测方法,校准测量无线电干扰水平,并比较这些与阈值干扰限制,已建立的干扰进入分配给射电天文服务的频带。这些观测的测量时间和带宽间隔可以与干扰信号的时间和频率变化特性相称,并且阈值水平可以使用2\,000秒的参考时间间隔从ITU-R RA. 769中呈现的值适当地缩放。天文仪器的数据丢失可以测量为在时间-频率域中对于短和长测量间隔的占用的百分比。在移动卫星业务中,对于非对地静止卫星系统和地球站所观察到的时间-频率占用特性可以被结合到有效功率通量密度仿真中,以获得由于这些业务而导致的有效数据丢失和天空阻塞。

英文摘要:

This paper presents an observing methodology for calibrated measurements of radio interference levels and compare these with threshold interference limits that have been established for interference entering the bands allocated to the Radio Astronomy Service. The measurement time and bandwidth intervals for these observations may be commensurate with the time and frequency variability characteristic of the interfering signals and the threshold levels may be appropriately scaled from the values presented in ITU-R RA.769 using a 2\,000 seconds reference time interval. The data loss for astronomical instruments may be measured as a percentage of occupancy in the time-frequency domain both for short and long measurement intervals. The observed time-frequency occupancy characteristics for non-geostationary satellite systems and earth stations in the mobile-satellite service may be incorporated into an effective power flux density simulation to obtain the effective data loss and sky blockage due to these services.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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