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ISEE-3 Reboot recovery : A nice story indeed

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Jun 15th, 2014 at 3:37pm  
Zombie ship coming back home from space graveyard Smiley

http://www.nytimes.com/2014/06/15/science/space/calling-back-a-zombie-ship-from-...
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« Last Edit: Aug 21st, 2015 at 10:06am by Admin1 »  
 
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Reply #1 - Jul 19th, 2014 at 10:09pm  
..and the story, said to be finished on July 9, still goes on!
Read on here:

http://www.themarysue.com/isee3-satellite-engines-fire/

Go, zombie, go!

...
telemetry is here: http://isee3.p3s.nl/

almost-live news: https://twitter.com/ISEE3Reboot

Stay tuned  Wink
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Reply #2 - Jul 19th, 2014 at 10:45pm  
Many thanks Alphaco for telling us about this.
Well done to all concerned. Any idea what antenna they are using ?

Best regards, Eric
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Reply #3 - Jul 19th, 2014 at 11:41pm  
The ISEE-3 Reboot team in the defunct McDonald's (now called McMoon's) uses a link to Arecibo, where voluntary Arecibo staff manually switch a amsat-DL (German sat radio hams)-built power amplifier on and off.

Details here: http://www.planetary.org/blogs/guest-blogs/2014/how-to-transmit-to-isee-3.html

Receive signal is now something beyond 32dB signal to noise in Arecibo, and the guy who posted the FFT display uses just a one meter grid dish looking much like the cheapo Wifi link gear.

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Another guy uses some other junk: twitter.com/PA4DAN/status/489031930466537472/photo/1

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see also: https://twitter.com/uhf_satcom/status/490590289581850625

Maybe you have a big enough dish, 2.4GHz LNA and an analyzer to see it yourself (soon), but I don't have coordinates to point to.
update: yes i have them: here they are - don't ask me how to read these for the moment: http://spacecollege.org/isee3/updated-ephemeris-for-isee-3-at-jpl-horizons.html

...Since I read this topic first a few days ago, I found today that I was light-years behind already  Smiley

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Reply #4 - Jul 20th, 2014 at 7:25am  
An orbit diagram (pause the video at the end to have a more precise view): http://www.space.com/25704-probe-launched-in-1978-coming-close-to-home-but-we-ca...

I have to grab that Amsat-downconverter of mine, one of my 90cm dishes and the 4-turn helix and try to trim the LO, or see if it has any useful gain at 2.2GHz, because we could still just have a Earth fly-by and nothing else. 
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Reply #5 - Aug 11th, 2014 at 7:40am  
My 2.4GHz downconverter mods having failed (no suitable quartz available in time, and I now have the thing in a state where it needs a good analyzer to trim it back to where it was, if at all worth it, 2.4 GHz being too much used by Wifi, Microwave ovens, etc.
Meanwhile ISEE-3 has flown past Earth and Moon, and lacking nitrogen pressure in the relatively full fuel tanks, no trajectory correction manoeuver could be done, so it is off for another 15-year ride around the sun.

See here http://spacecraftforall.com/ - a nice animated website about the craft (no Chrome install needed, really), and here: https://twitter.com/ISEE3Reboot for current status.

Thanks to Paul Marsh and others on the ICR #hearsat channel for all the advice. I'll be "more ready" for the next signals, hopefully.
I'll go back to my 1.8m TVro sat dishes for UK expats for the moment.

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