デツカ海図の計算(日本航海学会第35回講演会)

抄録

This paper discusses how to compute hyperbolic lattices of Decca radionavigational system. 1, We decided the more adequate computational procedure instead of which has been used to compute hyperbolic lattices for charting, by HIPAC 103 electronic computer of our Hydrographic Office. 2. The error of estimated lattices due to uncertainty of phase velocity is investigated. Because we are demanded to compute hyperbolic lattices at sea around Hokkaido, but we have poor data on phase variation of signal in the 70〜130KHz band in the above area.