Product Information - 9522B
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Iridium L-Band Data Modem
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Manual, Version Date: July 2011  Manual

General Description

The Iridium satellite network consists of a constellation of 66 satellites situated in 6 planes in low-earth orbit. Each plane is populated by 11 satellites in polar orbits, giving the Iridium network excellent coverage in high latitudes that equatorial satellites often cannot reach.

Unlike other satellite systems the Iridium satellite system is located in a low polar orbit, giving the system complete global coverage. Their relatively low altitude (780 km) means that they are situated close to transmitting modems and therefore require less transmission energy.

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