A satellite truck is a mobile communications satellite

Communications satellite

A communications satellite is an artificial satellite stationed in space for the purpose of telecommunications...

 Earth station

Earth station

A ground station, earth station, or earth terminal is a terrestrial terminal station designed for extraplanetary telecommunication with spacecraft, and/or reception of radio waves from an astronomical radio source. Ground stations are located either on the surface of the Earth, or within Earth's...

, typically mounted on a truck

Truck

A truck or lorry is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power, and configuration, with the smallest being mechanically similar to an automobile...

 chassis on a platform allowing satellite transmission from any location that the production truck

Production truck

Television Production trucks were developed to take television studios on the road so video productions could be made at distant locations for a remote broadcast, outside broadcasting , electronic field production with multiple-camera setup and a support of a number of different technologies to...

 can reach, provided a line of sight (direct view) to the desired satellite is available.
Typically a satellite truck will have its own on-board power source such as an electrical generator

Electrical generator

In electricity generation, an electric generator is a device that converts mechanical energy to electrical energy. A generator forces electric charge to flow through an external electrical circuit. It is analogous to a water pump, which causes water to flow...

 or inverter

Inverter (electrical)

An inverter is an electrical device that converts direct current to alternating current ; the converted AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits....

 to create the alternating current

Alternating current

In alternating current the movement of electric charge periodically reverses direction. In direct current , the flow of electric charge is only in one direction....

 to power all the transmission systems, which makes it a true independent mobile satellite transmission entity.