Title :
Phase disturbance of 100-kHz groundwaves by a circular island in the open sea
Author :
Yamashita, Michiko ; Taguchi, Kazuo
Author_Institution :
Nagoya City College of Child Education, Aichi, Japan
fDate :
1/1/1981 12:00:00 AM
Abstract :
The hyperbolic position fixing of ships by the Decca navigation system utilizes groundwave propagation. But the hyperbolic pattern will be disturbed by an isolated island. The instantaneous phase velocity and the bearing error are calculated from the equiphase lines near the island. It is found numerically and experimentally that the hyperbolic pattern is bent towards the island that is situated on the baseline between the master station and the slave one.
Keywords :
Ground-wave propagation; Marine-vehicle navigation; Radio navigation position measurement; Radio navigation terrain factors; Dipole antennas; Earth; Marine vehicles; Master-slave; Navigation; Nonuniform electric fields; Receiving antennas; Sea surface; Surface impedance; Transmitting antennas;
Journal_Title :
Oceanic Engineering, IEEE Journal of
DOI :
10.1109/JOE.1981.1145481