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SATCOM - Space and Satellite Monitoring Forum - Forum for the discussion of the Space Shuttle, Satellites, Military Satcom, and Amateur Radio Satcom communications.

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Old 11-16-2017, 12:00 PM
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Default 1 trillionth of a watt

There is an excellent show on PBS about the design and construction of Voyager. The power of the signal from Voyager is less than 1 trillionth of a watt by the time it reaches the NASA receiving station.

See this:

Voyager's Scientific Toolkit | The Science | Farthest
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Old 11-16-2017, 12:44 PM
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It's all due to Golay encoding of the signal that a trillionth of a watt results in any data collection, a very effective encoding method, also used on HF in the now little used GTOR fsk mode.
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Old 11-16-2017, 6:19 PM
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And a 70-m (230-ft) antenna...
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