Development of Radio Spectrum Monitor for HF Communication

단파 스펙트럼 수신 모니터링 시스템 개발

Park, Sung Won;Kim, Young Yun

  • Received : 2015.07.15
  • Accepted : 2015.09.03
  • Published : 2015.09.30


Electromagnetic waves which are emitted from the Sun due to solar flare explosion can cause failures in HF radio communications in the day-side area of the Earth, that is so-call as Radio Blackouts. The international scale representing the severity of the Radio Blackouts is determined by the solar X-ray flux which is measured by United States Geostationary Operational Environmental Satellite. However, the scale is not always applicable to HF communication users in the different area on the Earth, because the HF communication effects depend not only on the X-ray strength but also on the subsolar point location. To solve this problem, we developed a HF radio spectrum monitoring system utilizing a spectrum analyzer. This system conducts a real-time measure of the HF spectrum, and automatically calculates signal to noise ratios and the occurrences of the HF blackouts as comparing with the interference level which is described from the ITU recommendation.


Solar Flare;X-Ray Flux;Radio Blackouts;Radio Spectrum Monitor


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