Integrated communications and navigation terminal

The mobile radio communications industry has recently witnessed a new demand for terminal equipment which can provide both communications and position reporting capabilities on a global scale. For example, the automatic monitoring of secure cargoes during international transportation. Thus, there is much interest in the development of land mobile satellite terminal equipment in the form of a single integrated unit which can economically provide both of these facilities. The development of such a unit is considered using the Inmarsat-C satellite communications service and the Navstar Global Positioning System (GPS)