航行用100kHz電波帯の伝搬特性の解析とそれらによる船位精度の改善…VI : ロランC…V(日本航海学会第45回講演会)

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  • Studies on the Both Propagation Characteristics of Radio Waves in the 100kHz Navigation Band and Improvement of Ship's Position by Them-VI : Loran C-V
  • 航行用100KHz電波帯の伝搬特性の解析とそれらによる船位精度の改善-6-ロランC-V
  • コウコウヨウ 100KHz デンパタイ ノ デンパン トクセイ ノ カイセキ ト ソレラ ニ ヨル センイ セイド ノ カイゼン 6 ロラン C-V

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説明

The Loran C, [SS3], data of 1967-1971 were analysed as follows ; In the propagation route of Y rate over seawater, the constant deviations versus the distance from the master station were shown for linearly correlation, and the constant is ±3.2μs/100n.m. The deviation of X rate observed at Hiraiso was agreed with this constant in spite of the different area. The seasonal variation of the reflecting height was found at night and these stability was superior to that of day. The correlation between the field strength of X rate at Hiraiso and the 10μs jumps could not be found at the present time. Some modes of reflecting height in 100kHz were accordance with season, latitude and the direction of the pass route. If the SWC value is decided in fix, these variations will over the accuracy of this system frequently. Consequently, the Loran C SWC tables should be roughly correct by these condition above.

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