Lest you complain about your -80dBm WiFi signal being weak...
Voyager 1 is over 10 Billion miles away.
The Inverse Square Law at work.
Voyager 1 is over 10 Billion miles away.
- The path loss is about 300 dB (!)
- Transmits data on 8.4GHz at 12 or 18 watts with a 3m dish
- NASA's Deep Space Network dish antennas, e.g., Goldstone, are 30m diameter.
- Receivers are narrow bandwidth
- Low noise amplifiers are super-cooled
- Data rate is on the order of 10s of bps
The Inverse Square Law at work.
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