SHIP POSITION CALCULATING APPARATUS

摘要

PURPOSE:To increase a position measuring accuracy by catching and tracking a variable reflectivity radar reflector located on a buoy by a radar and calculating a ship's own position by means of the collation between the code of the reflector and set position data. CONSTITUTION:Received radar signals from a transmitter and receiver 20 and reflector response signals from a variable reflectivity radar reflector 60 are received by main and SLS antennas and pass through a video signal creator 208a or 208b to become received video signals. Both the signals are compared with each other in an SLS comparing circuit 210 and the received video signals produced by means of a side lobe are removed. Thereafter, radar video and reflector response video are separated by a multiplexer 211. In a processor 30, a reflector code and a reflector position are separated and extracted by a decoder 301. The extracted code is inputted to a computer 40, collated with the reflector code and position data and a ship's own position is calculated on bearing signals from a gyrocompass 70 and the like.