IRIDIUM
Formal
A satellite communication constellation that provides global voice and data coverage through its satellite network, operating on the 1618.85 to 1626.5 MHz frequencies.
Practical
The Iridium satellite constellation is a satellite constellation providing voice and data coverage to satellite phones, pagers and integrated transceivers over Earth's entire surface. Iridium Communications owns and operates the constellation and sells equipment and access to its services. The constellation consists of 66 active satellites in orbit, and additional spare satellites to serve in case of failure.
