THE CHARACTERISTICS OF THE DISTRIBUTION OF ATMOSPHERICS SOURCES AND THE CONSIDERATION OF THE FIXING ERROR

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The monthly distribution of atmospherics sources in the Far East in 1973 was obtained using the triangulation of the three direction finding stations. In general, the dispersive trend in the distribution appears in the region of the continent of China in summer, and in the region of the Pacific Ocean in winter. And the concentrative trend in the distribution appears around the Yangtze River in spring and in autumn. However, it is clear from the directional distribution at Sakushima station that the fixing rate in the region a long the baselines is lower than in the other regions because of the distortion caused by the shape of the network. Therefore, the characteristics of the distribution in the region along the baselines can not be obtained accurately. The calculation of the fixing error by means of computer was carried out under the conditions due to the measurement accuracy of the direction finder and the arrangement of the three direction finding stations. And also the fixing error was calculated from observational data in 1973 by using the error calculation equation. So that, it is estimated that the fixing error in the region perpendicular to the baselines depends mainly upon the measurement error of the direction finder and the arrangement of the three direction finding stations, and that that in the region along the baselines depends primarily upon the conditions for the fixing of the triangulation and the equation adopted for the error calculation.

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