オメガ信号の擾乱 : ことに高緯度帯の航行中における

概要

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OMEGA propagation disturbances have been studied by the author and he presented the two papers already, but the experimental results were reanalised by the solar terrestrial physical and geomagnetic data published later. Examining the results of twice trans-Pacific experiments made in 1969 and 1971, it was ascertainable that more significant features of OMEGA disturbances were found at high latitudes, and the phase fluctuations of sudden change were great and rapid. In this paper, however, the author publishes Magnetic anomalies and Aurora hiss. The magnetic storm occured along the propagation path of OMEGA signal gives rise to the propagation disturbances. The phenomena discussed here were shown in the following predominant pattern. Namely, fluctuation of OMEGA signal synchronized completely with the geomagnetic anomalies. In the precise description, when the magnetic variarion set in maximum, the phase disturbance was started, the phenomena during the anomalies were lasted, and it ceased when the variation recovered the original value. The duration was about 9 hours and the fluctuation was 20 cel in maximum. Additionally, aurora hiss was observed frequently around the Aleutian Islands. Through the experiments, the author would propose that simple field strength meter of signal was an useful detector for the solar terrestrial disturbances capable of avoiding the systematic error.
公益社団法人日本航海学会の論文
1974-12-25