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NASA's Voyager 1 Resumes Sending Engineering Updates to Earth

blogs.nasa.gov

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Re: NASA's Voyager 1 Resumes Sending Engineering Updates to Earth

#165

> The team started by singling out the code responsible for packaging the spacecraft’s engineering data. They sent it to its new location in the FDS memory on April 18. A radio signal takes about 22 ½ hours to reach Voyager 1, which is over 15 billion miles (24 billion kilometers) from Earth, and another 22 ½ hours for a signal to come back to Earth. Talk about a slow feedback loop! And I get frustrated when I need t…

How much data can you send in a single radio single? I assume it's not TCP/IP

Downlink from Voyager to Earth is currently 40 bits/s but can be up to 160 bits/s. The signal is received at -160dBm or around 100 _zeptowatts_ (1e-22 kW).
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