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Antique Voyager Technology
sea_stuart writes with a story from the Tidbinbilla space tracking station, outside Canberra, Australia. It is still communicating with the two Voyager spacecraft 30 years after they were launched and 18 years after Voyager 2 passed close by Neptune. Here's a little background on Voyager 1 and Voyager 2. "The bank of computers that would look at home in black-and-white episodes of Doctor Who cannot be junked... [T]he 1970s hardware is now our world's only means of chatting with two robot pioneers exploring the solar system's outer limits. Today Voyager 1 is humanity's most remote object, 15.5 billion kilometers from the sun. Voyager 2 is 12.5 billion kilometers from it. Both continue beaming home reports, but now they are space-age antiques. 'The Voyager technology is so outmoded,' said Tidbinbilla's spokesman, Glen Nagle, 'we have had to maintain heritage equipment to talk to them.'"
Is it really that impossible to run these machines inside an emulator on a modern server?
I can still play my atari 2600 games on my xbox.
They're using their grammar skills there.
Communication with different equipment has been done. http://www.arrl.org/news/stories/2006/04/25/2/
Proof that it's not a problem to receive and decode. Transmit can't be any harder. But why "upgrade" it if they don't have to? The old equipment probably works just fine, so there is no incentive.
The same software SCATS
That sounds like some pretty shitty software...(ring) (ring) (click) G'day, this is Tidbinbilla, how can we help?
"Er, Hi, This is Ranesh from Advanced Emulation Solutions... I'm testing the VM you commissioned to replace your legacy communications solution. Thing is, there seems to be an undocumented bug in the command protocol and the remote client has locked up. Could some one pop over and power-cycle the client, please?
****???^^^^!!!!
Hey - take it easy - "no worries" as you guys say - just turn off the power, count to ten and turn it on again!
$$$$!!!!##### !!!!!
Er, 15.5 billion kilometers, you say? Look, I know you guys like to boast about the size of Australia, but...
$$$$ ****ING OUTER SPACE !!!!! MOST DISTANT MAN-MADE ****ING OBJECT !!!!!
Oh. Shit. I wonderered why the ping time was 24 hours.
Don't you guys have on-site support?
In a survey of 100 programmers, 111111 thought that duck-typing was a good idea.
What is little known externally except by those that actually worked on this project is that the radios work at all is amazing. Motorola GEG built the radios in the Voyager spacecraft. Right after launch of both space crafts there was a failure of a critical capacitor that sets the bandwidth of the acquisition loop filter. The net result of that failure was that the signal acquisition of the radios was severely impaired. In order to compensate for this NASA engineers developed an emperical model of the entire spacecraft while it was on it's initial loop around the sun for it's slingshot to Jupiter. Since it was relatively close they could hit the spacecraft with a very large signal thus ensuring acquisition of the transmitted commands. The model consisted of predicting exactly where the front end input LO would be depending upon the temperature of the space craft, the added doppler due to movement, aging of the crystals, etc, etc. Basically anything that could effect the LO was factored in. Once the model was complete, the ground stations would then use and probably still use, this model to predict what the frequency for lockup needs to be. Due to the efforts of the engineers at NASA, they were able to "save" both spacecraft and the mission. And they still work today!!! Pretty amazing.
"TV, a medium as it is neither rare nor well done." Ernie Kovacs
Yes, the science community will be rather surprised when the Voyager spacecraft smash into the huge black sphere with the painted stars.
Terrorists can't threaten a country's freedom and democracy. Only lawmakers and voters can do that.