Laser satellite communication is optical communication that uses satellites. Satellites send information to Earth via laser signals, or invisible light signals. This makes data transmission much faster than using the radio frequencies that we currently use for communication all over the world.
ATLAS carries two lasers, one primary and one backup. The laser light is at 532 nanometers, a bright green on the visible spectrum. It is fast-firing – it sends 10,000 pulses per second, as compared to the laser on the first ICESat, which sent 40 pulses per second.
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