ローランにおける空間波の伝播誤差特性 : III.一対の地表波と空間波の時間差によるロラン位置の線の精度(日本航海学会第25回講演会)

抄録

When the distance between two transmitting stations, master and slave, is too long, or there is the ground between them, in some region it is impossible for us to receive both ground waves from the two station and yet two effective sky waves cannot be received because the distance from one station is less than 250 nautcal miles. For these special regions, it is required to determine the Loran fix by the time difference between the ground wave from one station and the sky wave from the other. In this case special correction must be applied. These special corrections are shown in the Loran Table. The accuracy of these special corrections has not been considered. The authors calculated the probable error of these special corrections and also the probable error of Loran fix determined using these special corrections. Then the accuracy of Loran fix determined by ground wave and sky wave is compared to that determined by usual sky waves.