- ATMOSPHERICS ACCOMPANIED BY COLD FRONTS
Investigation was made on the atmospherics observed with a narrow sector goniometer tuned to 12 kc/s and an automatic intensity recorder tuned to 27 kc/s in Toyokawa observatory from December, 1952 to September, 1953. We classified these atmospherics into three groups, i.e. (1) atmospherics of distant origins which displace gradually in accordance with time of the day or seasons of the year, (2) atmospherics not directly correlated with cold fronts, (3) atmospherics accompanied by cold fronts passing across the Japan Islands. We examined time and direction of appearance of atmospherics (3)， and found that clearly defined cold fronts generally accompany atmospherics when they are activated by landing on the Japan Islands after passing over the Japan Sea or by ascending on the central mountain-ranges of Japan.
空電研究所報告 4 (2), 94-102, 1954-03-30