DUALIZATION SWITCHING METHOD BASED ON A SHADOW ANGLE IN A SATELLITE ANTENNA DUALIZATION CONTROL SYSTEM FOR A SHIP, CAPABLE OF GUARANTEEING SAFE SAILING

摘要

PURPOSE: A dualization switching method based on a shadow angle is provided to minimize the generation of a shadow area in a satellite antenna regardless of the location of a sailing ship.;CONSTITUTION: A dualization control device calculates current location information for a first antenna device based on a difference between a heading angle of a current ship and a satellite direction angle of a first antenna device. The dualization control device determines whether the current location information is included in a set shadow area(ST3). When a current operation state of the first antenna device enters into a current shadow area, the dualization control device converts the current operation state into the operation state of a second antenna device(ST4).;COPYRIGHT KIPO 2013;[Reference numerals] (ST1) Set a shadow area for a first and a second antenna device; (ST2) Transceive signals with a communication satellite(1) through an operation satellite antenna; (ST3) Monitor the shadow area of the operation satellite antenna; (ST4) Switch the satellite antenna if the entrance of the operation satellite antenna into the shadow area is determined