3 ms·

I think the obscurity is more due to the fact that reaching it with sufficient signal strength requires a big, big dish with a big, big amplifier.

drmpeg 2y ago
Also, the exact uplink and downlink frequencies are not published.
- viraptor 2y ago
  https://voyager.gsfc.nasa.gov/Library/DeepCommo_Chapter3--141029.pdf https://voyager.gsfc.nasa.gov/Library/DeepCommo_Chapter3--14... seems to include pretty specific up/down carrier frequencies and channels used.
  - drmpeg 2y ago
    I wonder why the frequency was redacted in this tweet. https://x.com/nascom1/status/1851789221885022416 https://x.com/nascom1/status/1851789221885022416
    - viraptor 2y ago
      Maybe they're hiding the current Doppler shift? Or just trying to prevent noise from randos experimenting in that range?
      - ElectRabbit 2y ago
        They removed the frequencies from some of the more popular sites. That started during early stages of the Ukraine invasion. But it's still super easy to find them. Usually it takes a few hours until the sat ham guys find them and post spectrums.
- ElectRabbit 2y ago
  The frequencies of most research satellites are all well known. But it takes more than 30 seconds of Googling.
MoreMoore 2y ago
I'm more surprised that Russia or China haven't attempted to communicate with things like Voyager. Not necessarily to sabotage, but to find out as much as they can about it by interacting with it.
- ben_w 2y ago
  At the time? Perhaps, I don't know when the design documents* became public. But today, Voyager 1 is a 50 year old curiosity, still of interest to cosmologists of course, but governments will be less interested in it than archeologists. * e.g. https://voyager.gsfc.nasa.gov/Library/VOY_library.html https://voyager.gsfc.nasa.gov/Library/VOY_library.html and https://ntrs.nasa.gov/api/citations/19660011758/downloads/19660011758.pdf https://ntrs.nasa.gov/api/citations/19660011758/downloads/19...

drmpeg 2y ago

Also, the exact uplink and downlink frequencies are not published.

viraptor 2y ago
https://voyager.gsfc.nasa.gov/Library/DeepCommo_Chapter3--141029.pdf https://voyager.gsfc.nasa.gov/Library/DeepCommo_Chapter3--14... seems to include pretty specific up/down carrier frequencies and channels used.
- drmpeg 2y ago
  I wonder why the frequency was redacted in this tweet. https://x.com/nascom1/status/1851789221885022416 https://x.com/nascom1/status/1851789221885022416
  - viraptor 2y ago
    Maybe they're hiding the current Doppler shift? Or just trying to prevent noise from randos experimenting in that range?
    - ElectRabbit 2y ago
      They removed the frequencies from some of the more popular sites. That started during early stages of the Ukraine invasion. But it's still super easy to find them. Usually it takes a few hours until the sat ham guys find them and post spectrums.
ElectRabbit 2y ago
The frequencies of most research satellites are all well known. But it takes more than 30 seconds of Googling.

MoreMoore 2y ago

I'm more surprised that Russia or China haven't attempted to communicate with things like Voyager. Not necessarily to sabotage, but to find out as much as they can about it by interacting with it.

ben_w 2y ago
At the time? Perhaps, I don't know when the design documents* became public. But today, Voyager 1 is a 50 year old curiosity, still of interest to cosmologists of course, but governments will be less interested in it than archeologists. * e.g. https://voyager.gsfc.nasa.gov/Library/VOY_library.html https://voyager.gsfc.nasa.gov/Library/VOY_library.html and https://ntrs.nasa.gov/api/citations/19660011758/downloads/19660011758.pdf https://ntrs.nasa.gov/api/citations/19660011758/downloads/19...