On the Propagation Correction of Omega Navigation System in the Differential Mode

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  • Differential方式によるオメガの伝搬補正について
  • Differential ホウシキ ニヨル オメガ ノ デンパン ホセイ ニ

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Data of the propagation phase difference on A-H and C-H pair were measured on the south coast of Hokkaido from April 1〜9, 1977 and on the west coast of Hokkaido from May 12〜15, 1977. These propagation phase difference were corrected with previously published correction table and the differential mode, and compared with the theoretical propagation phase difference. These data were divided into three groups of daytime, nighttime, and one hour around sunrise and sunset. In the differential mode, the monitor station was set at Hakodate (41°48'.4N 140°43'.3E). The position at the observations were determined with satellite navigation system and radar. The analyzed results, in the differential mode, are summarized: 1) At nighttime and one hour around sunrise and sunset, the variation was smaller than using the PPC table, but the difference was not significant level. However, in daytime, it was highly significant level. 2) The difference of variance was highly significant between daytime and nighttime, between daytime and one hour around sunrise and sunset. 3) When the distance between the monitor station and the observed position divided with 10 miles, the value of the difference between the theoretical propagation phase difference and the actual propagation phase difference had a variation of about 1cec on A-H pair.

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