海事卫星是用于海上和陆地间无线电联络的通信卫星。其通信系统由两部分组成:卫星和地面的卫星测控站属空间部分;岸站和船站属于地球部分。岸站是卫星通信的地面中转站,船站设在航行的油船、客轮、商船和海上浮动平台上。船站的天线均装有稳定平台和跟踪机构,即使在波涛起伏或船只出现倾斜的情况下, Maritime satellites are communication satellites used for radio connection between sea and land. Its communication system consists of two parts: satellite and terrestrial satellite monitoring and control station is a space part; shore stations and ship stations belong to the earth part. Shore station is a satellite communication ground transfer station, the ship is located in the sailing oil tankers, passenger ships, merchant ships and offshore floating platform. The antenna of the shipyard is equipped with a stable platform and tracking mechanism, even in the case of undulating waves or ships inclined,