Effektive satelitt mobilkringkastingssystemer for betjeningsomrÕder ved h°ye breddegrader

摘要

A satellite audio broadcasting system for mobile and fixed receivers at or near the earth's surface in geographic service areas at latitudes above about 30 degrees N or below about 30 degrees S include a satellite constellation of two or more satellites, each in its own geosynchronous orbit, with each orbit having orbital parameters that provide elevation angles of more than 35 degrees throughout the service area.