3 ms·

> they zoomed in closer than previous studies, plotting a new datapoint every 1.92 seconds. Is the original data stored in analog somehow? Was it transmitted

> they zoomed in closer than previous studies, plotting a new datapoint every 1.92 seconds. Is the original data stored in analog somehow? Was it transmitted to Earth analog? I'm curious how they get to pick their own sample rate.

stormbrew 7y ago
I would have thought that being built in the 70s, data transmission from the voyagers would still be analog, but apparently not. According to the press kit for the voyager[1] missions, all data was sent digital and there's details on what was sent at what data rate. So it seems like they must have previously just sampled the data differently. Maybe specifically because they weren't looking for this particular kind of phenomena, so a higher sample rate wasn't seen as necessary? [1] https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770079866.pdf https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/197700...
- drmpeg 7y ago
  Even satellites built in 1967 were digital. https://destevez.net/2020/03/decoding-les-5/ https://destevez.net/2020/03/decoding-les-5/
- scottlocklin 7y ago
  Voyager used one of the most beautiful error correcting codes; the Golay codes. https://en.wikipedia.org/wiki/Binary_Golay_code https://en.wikipedia.org/wiki/Binary_Golay_code Also best 1 page paper ever (<tm> Elwyn Berlekamp): https://www.lama.univ-savoie.fr/pagesmembres/hyvernat/Enseignement/1718/info607/TP-Golay/golay_paper.pdf https://www.lama.univ-savoie.fr/pagesmembres/hyvernat/Enseig...
garmaine 7y ago
Sibling comment seems to indicate the data was digital. But interesting a lot of probes from that era were actually analog, and better technology now allows revisiting the recordings with some pretty spectacular results. See, for example, the Lunar Orbiter Image Recovery Project: http://www.moonviews.com http://www.moonviews.com
_trampeltier 7y ago
Dave Jones made a couple videos about how comunication with Voyager 2 works. https://m.youtube.com/watch?v=FzRP1qdwPKw https://m.youtube.com/watch?v=FzRP1qdwPKw
deleted 7y ago
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stormbrew 7y ago

I would have thought that being built in the 70s, data transmission from the voyagers would still be analog, but apparently not. According to the press kit for the voyager[1] missions, all data was sent digital and there's details on what was sent at what data rate. So it seems like they must have previously just sampled the data differently. Maybe specifically because they weren't looking for this particular kind of phenomena, so a higher sample rate wasn't seen as necessary? [1] https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770079866.pdf https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/197700...

drmpeg 7y ago
Even satellites built in 1967 were digital. https://destevez.net/2020/03/decoding-les-5/ https://destevez.net/2020/03/decoding-les-5/
scottlocklin 7y ago
Voyager used one of the most beautiful error correcting codes; the Golay codes. https://en.wikipedia.org/wiki/Binary_Golay_code https://en.wikipedia.org/wiki/Binary_Golay_code Also best 1 page paper ever (<tm> Elwyn Berlekamp): https://www.lama.univ-savoie.fr/pagesmembres/hyvernat/Enseignement/1718/info607/TP-Golay/golay_paper.pdf https://www.lama.univ-savoie.fr/pagesmembres/hyvernat/Enseig...

garmaine 7y ago

Sibling comment seems to indicate the data was digital. But interesting a lot of probes from that era were actually analog, and better technology now allows revisiting the recordings with some pretty spectacular results. See, for example, the Lunar Orbiter Image Recovery Project: http://www.moonviews.com http://www.moonviews.com

_trampeltier 7y ago

Dave Jones made a couple videos about how comunication with Voyager 2 works. https://m.youtube.com/watch?v=FzRP1qdwPKw https://m.youtube.com/watch?v=FzRP1qdwPKw

deleted 7y ago

[deleted]