[time-nuts] A Short but sweet Reply
Hi folks, I have had a number of replies to my first post, thanks guys, let me see how can I reply... Gerald...g'day, I see you're a stones through away, just checking out your QRZ.COM entry, you are definitely a well travelled fellow, I've been in Electronics Manufacturing for 30 years myself but only once got a chance to trip overseas, 10 days in China at Tianjin Beijing it was a great experince. Nice to be here too. Thomas...thanks for your kind note, Amateur Radio is definitly a great medium it is truly amazing that the amateur service world wide have so many Radio Bands allotted to us for our use from Long Wave to Microwave and with the Solar Maximum coming up in a few years time its good to have a operational HF Station one can make some great contacts, all I can say is go for it! Stan...Hi, thanks for the info on Down East Microwave, it's been a couple of years since I last visited the web site, I have purchased a few items from them in the past they definitely make some nice toys...I'll keep them in mind. As for Stephen N5AC web site, very interesting indeed I've already let a couple of friends of mine know about this one...thanks again. Bill...Thanks for pointing out the A32 Synthesizer, this is quite interesting and requires some futher looking into, I'm slowing building up my 10GHz station starting with kits supplied by Mark VK5EME at Minikits and with a 20 Watt TWT I got from DEM I hope to do some interesting things! David...Yes KUHNE Electronics make some very very fine equipment, a little expensive, but the quality is through and through, I purchased a 8.4GHz Pre-Amp from them for the 8.4GHz receiver, it's the key part of this project and the most expensive part, so I'm really looking after this device. If I had the money I'd be interested in a few more items!! Jim L...There is a handful of Amateurs that have quite sussessfully detected the Telemetry Signals from both NASA and ESA space probes currently roaming space, the idea is to simply detect these feably weak signals, thats the aim, trying to copy telemetry and things like pictures is a long shot considering the digital nature of transmissions these days. If you visit this site, http://www.uhf-satcom.com/ or more directly this link, http://www.uhf-satcom.com/mro/ you will see what I attempting to do, there is a Block Diagram showing the basic system setup required, I have pretty much everything I need I've just got to put it together. Joseph Ruggieri often has microwave itms for sale on eBay thats where I got my Brick from ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A Short but sweet Reply
Hi Clint, Quite an impressive list of sources you've put together from the assembled replies! Also I found your pages interesting in regard to the progress with deep space reception. You may also like to look at my web information on Direct Frequency Synthesisers for providing low phase noise drive solutions for microwave oscillators strips, locked to a reference source - eg a GPSDO. url is http://g4hup.com Best 73, Dave, G4HUP - Original Message From: Clint Jeffrey - VK3CSJ [EMAIL PROTECTED] To: time-nuts@febo.com Sent: Tuesday, 2 September, 2008 4:35:01 PM Subject: [time-nuts] A Short but sweet Reply I was falling asleep at the Keyboard an accidently sent my post to soon...aha it happens when you get old! Hi folks, I have had a number of replies to my first post, thanks guys, let me see how can I reply... Gerald...g'day, I see you're a stones through away, just checking out your QRZ.COM entry, you are definitely a well travelled fellow, I've been in Electronics Manufacturing for 30 years myself but only once got a chance to trip overseas, 10 days in China at Tianjin Beijing it was a great experience. Nice to be here too. Thomas...thanks for your kind note, Amateur Radio is definitely a great medium it is truly amazing that the amateur service world wide have so many Radio Bands allotted to us for our use from Long Wave to Microwave and with the Solar Maximum coming up in a few years time its good to have a operational HF Station one can make some great contacts, all I can say is go for it! Stan...Hi, thanks for the info on Down East Microwave, it's been a couple of years since I last visited the web site, I have purchased a few items from them in the past they definitely make some nice toys...I'll keep them in mind. As for Stephen N5AC web site, very interesting indeed I've already let a couple of friends of mine know about this one...thanks again. Bill...Thanks for pointing out the A32 Synthesizer, this is quite interesting and requires some further looking into, I'm slowing building up my 10GHz station starting with kits supplied by Mark VK5EME at Minikits and with a 20 Watt TWT I got from DEM I hope to do some interesting things! David...Yes KUHNE Electronics make some very very fine equipment, a little expensive, but the quality is through and through, I purchased a 8.4GHz Pre-Amp from them for the 8.4GHz receiver, it's the key part of this project and the most expensive part, so I'm really looking after this device. If I had the money I'd be interested in a few more items!! Jim L...There is a handful of Amateurs that have quite successfully detected the Telemetry Signals from both NASA and ESA space probes currently roaming space, the idea is to simply detect these feebly weak signals, that's the aim, trying to copy telemetry and things like pictures is a long shot considering the digital nature of transmissions these days. If you visit this site, http://www.uhf-satcom.com/ or more directly this link, http://www.uhf-satcom.com/mro/ you will see what I attempting to do, there is a Block Diagram showing the basic system setup required, I have pretty much everything I need I've just got to put it together. Joseph Ruggieri often has microwave items for sale on eBay that's where I got my Brick from, Joe currently has some items on eBay but I don't think he has any of the PLO devices left, one can always ask. Okay...I think that's it for the time being...its just gone 1:30am...must go to bed. Cheers all... Clint - VK3CSJ Melbourne ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A Short but sweet Reply
Jim L...There is a handful of Amateurs that have quite successfully detected the Telemetry Signals from both NASA and ESA space probes currently roaming space, the idea is to simply detect these feebly weak signals, that's the aim, trying to copy telemetry and things like pictures is a long shot considering the digital nature of transmissions these days. --- It's somewhat challenging (except when they're doing initial commissioning when the s/c is close to earth, so there's a huge signal, although with a s/c which has a big antenna (and small beamwidth), it would have to be far enough away that you're in the foot print (or you can be close to where they happen to be pointing it). As the link you gave shows, it's certainly possible. --- as for actually demodulating.. That's a bit trickier, but not too bad. You know the general data format (because it follows CCSDS standards), so all you have to do(?) is build a suitable carrier tracking loop and the subcarrier demodulators (or for medium and high rate, where a subcarrier isn't used, a regular old PSK demodulator). Then, you'll need some sort of logic to recognize the beginning of the frames, etc.. If you can receive transfer frames, you'll be doing quite well. As for what's in the frames, I'm not sure what's published and what's not (there's all manner of ITAR and such that needs to be considered when you start talking those details) --- A lot of it is in a book called 810-5, which is available on the JPL website. http://deepspace.jpl.nasa.gov/. The link parameters are something you can probably figure out for yourself (EIRP, etc.) If you visit this site, http://www.uhf-satcom.com/ or more directly this link, http://www.uhf-satcom.com/mro/ you will see what I attempting to do, there is a Block Diagram showing the basic system setup required, I have pretty much everything I need I've just got to put it together. Joseph Ruggieri often has microwave items for sale on eBay that's where I got my Brick from, Joe currently has some items on eBay but I don't think he has any of the PLO devices left, one can always ask. You can build a receiver a lot of ways. And a lot depends on what you want to do with it. If all you want is to see the carrier, then you're not going to need totally awesome performance, so probably any old receiver will work. Another interesting signal to look for is the radar from QuikScat at 13.402 GHz. It's got a PRF of a couple hundred hertz, and it can be detected with a LNA and a spectrum analyzer, if you know when and where to point the antenna. Jim Lux ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
