Complex sentence: The satellite was built by the Royal Aircraft Establishment in Farnborough; it was initially called Puck, and was designed to conduct experiments to test the technologies necessary for communication satellites, such as solar cells, telemetry and power systems.
Split into simpler sentences: The satellite was built by the Royal Aircraft Establishment in Farnborough. Initially called Puck, it was designed to conduct experiments to test the technologies necessary for communication satellites, such as solar cells, telemetry and power systems.