HF radio wave propagation disturbances
Abstract
High-frequency radio-wave propagation conditions in long-distance circuits early in August, 1972, are discussed. In this period, several major short-wave fadeouts and short-wave storms were observed at Hiraiso, which were caused by solar flares emitted from the solar active region 11976. The short-wave fadeouts were most distinctive and their quantitative relation to the corresponding solar X-ray flares was similar to that deduced from the data in IASY (1969-1971). The short-wave storms in this case followed respective geomagnetic disturbances and vice versa; geomagnetic disturbances were not always accompanied by radio-wave propagation disturbances. For these problems, the interval August 4-6, 1972, is the best.
- Publication:
-
Radio Research Laboratory, Journal
- Pub Date:
- 1974
- Bibcode:
- 1974RaRLJ..21..423M
- Keywords:
-
- Noise Storms;
- Short Wave Radio Transmission;
- Signal Fading;
- Solar X-Rays;
- Transhorizon Radio Propagation;
- Diurnal Variations;
- High Frequencies;
- Magnetic Disturbances;
- Magnetic Storms;
- Solar Flares;
- Communications and Radar