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SETI@home Science :
First Signs of the NTPCkr
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Matt Lebofsky Send message Joined: 1 Mar 99 Posts: 1444 Credit: 957,058 RAC: 0 |
Just to show some non-zero amount of progress on the Near Time Persistency Checker (a.k.a. the NTPCkr, pronounced "nitpicker"), I added some new fields to the science status page showing previous signals found where the telescope is currently pointing: http://setiathome.berkeley.edu/sci_status.html This isn't all that scientifically useful, but it is kind of interesting, and shows the basic guts of the NTPCkr are working - i.e. given a single "pixel" on the sky, show some basic up-to-the-minute stats about what we've seen there so far. Please note that: 1. We divide the sky up into millions of such "pixels," and each contains anywhere from 0 to roughly 100000 signals of varying type. Don't get excited or depressed about any of these number you see. 2. If you watch the page, you'll note that "multiplets" (groups of similar signals of similar frequency seen over multiple observations) are rather common. So don't get too excited about those, either. This is all BEFORE we remove RFI and other garbage from the database. 3. I still haven't yet fixed known precession errors (which I mentioned before in recent tech news items) so the coordinates are slightly off, anyway, but nevertheless this gives you a rough idea of what we got. The current NTPCkr work is focused on getting this running in near-real-time. This is the whole point of this extended project, as opposed to doing yet another one-fell-swoop kind of analysis which is painful and requires a month of focused manpower to do, which is why such things happen every few years. The grand hope of the NTPCkr is to be giving us good results every day. More news as we progress, I guess... - Matt -- BOINC/SETI@home network/web/science/development person -- "Any idiot can have a good idea. What is hard is to do it." - Jeanne-Claude |
Sir Ulli Send message Joined: 21 Oct 99 Posts: 2246 Credit: 6,136,250 RAC: 0 |
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John McCallum Send message Joined: 5 Dec 04 Posts: 877 Credit: 599,458 RAC: 8 |
Three steps forward one sideways then one back (keep awake in the back) Old enough to know better(but)still young enough not to care |
Dr. C.E.T.I. Send message Joined: 29 Feb 00 Posts: 16019 Credit: 794,685 RAC: 0 |
Thank You for the Post News Matt - iT is Sincerely Appreciated Sir Just to show some non-zero amount of progress on the Near Time Persistency Checker (a.k.a. the NTPCkr, pronounced "nitpicker"), I added some new fields to the science status page showing previous signals found where the telescope is currently pointing: BOINC Wiki . . . Science Status Page . . . |
Mr. Kevvy Send message Joined: 15 May 99 Posts: 3776 Credit: 1,114,826,392 RAC: 3,319 |
2. If you watch the page, you'll note that "multiplets" (groups of similar signals of similar frequency seen over multiple observations) are rather common. So don't get too excited about those, either. This is all BEFORE we remove RFI and other garbage from the database. Hard not to get excited when there are so many of them. :^) I've peeked at the page a few times, and just on the last peek, was showing 27 multiplet Gaussians where it happened to be looking. If anything, considering how tiny of a patch of sky that is, it illustrates how vast is the amount of data this project has accumulated and processed. Should provide years of possibilities for findings. Thanks for the always appreciated updates. |
Taurus Send message Joined: 3 Sep 07 Posts: 324 Credit: 114,815 RAC: 0 |
Thanks for sharing your progress with us! The results look promising! |
Dr. C.E.T.I. Send message Joined: 29 Feb 00 Posts: 16019 Credit: 794,685 RAC: 0 |
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Matt Lebofsky Send message Joined: 1 Mar 99 Posts: 1444 Credit: 957,058 RAC: 0 |
I just made this thread sticky, because, as suggested, this should be of high general interest. - Matt -- BOINC/SETI@home network/web/science/development person -- "Any idiot can have a good idea. What is hard is to do it." - Jeanne-Claude |
PhonAcq Send message Joined: 14 Apr 01 Posts: 1656 Credit: 30,658,217 RAC: 1 |
the table needs more explanation for us neophytes. for example, how can arecibo be currently pointing anywhere; by the time one reads the table the earth has moved. two bits. |
Matt Lebofsky Send message Joined: 1 Mar 99 Posts: 1444 Credit: 957,058 RAC: 0 |
the table needs more explanation for us neophytes. for example, how can arecibo be currently pointing anywhere; by the time one reads the table the earth has moved. two bits. I think I cleared up that text: the coordinates are changing all the time as you point out, but these readings are taken every ten minutes for our display purposes. And yes, there will be more useful descriptions at some point, especially as we get more interesting stats up on the site. - Matt -- BOINC/SETI@home network/web/science/development person -- "Any idiot can have a good idea. What is hard is to do it." - Jeanne-Claude |
PhonAcq Send message Joined: 14 Apr 01 Posts: 1656 Credit: 30,658,217 RAC: 1 |
Ok. Would it be useful to tell us how many wu's have been analyzed in the current position, so we can usefully normalize the numbers? |
Kathy Send message Joined: 5 Jan 03 Posts: 338 Credit: 27,877,436 RAC: 0 |
the table needs more explanation for us neophytes. for example, how can arecibo be currently pointing anywhere; by the time one reads the table the earth has moved. two bits. Thanks so much Matt, your news has been long awaited. Good on you! |
Fred J. Verster Send message Joined: 21 Apr 04 Posts: 3252 Credit: 31,903,643 RAC: 0 |
the table needs more explanation for us neophytes. for example, how can arecibo be currently pointing anywhere; by the time one reads the table the earth has moved. two bits. Hi Matt, i'am glad with your explanation, doesn't these signals, due to the earth's rotation, gives all kinds off 'DOPPLER Effects'. Or are those movements to complex to 'call' them so? |
Matt Lebofsky Send message Joined: 1 Mar 99 Posts: 1444 Credit: 957,058 RAC: 0 |
Of course. That's why SETI@home requires as much computation as it does - we're scanning the same frequency/time space over and over again assuming a kajillion different doppler shifts. We don't know where the signal is coming from, at what angle, and when, so we need to compensate for that. - Matt Hi Matt, i'am glad with your explanation, doesn't these signals, due to the earth's rotation, gives all kinds off 'DOPPLER Effects'. Or are those movements to complex to 'call' them so? -- BOINC/SETI@home network/web/science/development person -- "Any idiot can have a good idea. What is hard is to do it." - Jeanne-Claude |
Lalinka Send message Joined: 8 Nov 06 Posts: 1 Credit: 4,048 RAC: 0 |
I have it!!! I have signals!!! Lalinka |
Knightmare Send message Joined: 16 Aug 04 Posts: 7472 Credit: 94,252 RAC: 0 |
Matt...I have been one of the more vocal among the users about the lack of any analysis being done. I am now more proud than ever to say that I am a member of the community crunching Seti@home. Thank you for getting NTPCkr ( or at least the beginnings of it ) going. Air Cold, the blade stops; from silent stone, Death is preordained Calm Chaos Forums : Everyone Welcome |
Misfit Send message Joined: 21 Jun 01 Posts: 21804 Credit: 2,815,091 RAC: 0 |
Meanwhile 120 days later...? me@rescam.org |
PhonAcq Send message Joined: 14 Apr 01 Posts: 1656 Credit: 30,658,217 RAC: 1 |
Meanwhile 120 days later...? Glacial progress it appears! Rip Von Winkle has nothing on this project. |
Rapture Send message Joined: 22 Nov 08 Posts: 2 Credit: 1,641 RAC: 0 |
What is the current status? Can you provide any timeframe when this might be completed? It looks like this will not be done until sometime next year. |
Misfit Send message Joined: 21 Jun 01 Posts: 21804 Credit: 2,815,091 RAC: 0 |
And I remember a time when Matt said there was a danger of running out of work. Why work on the analysis of the data when they can spend their time with a new CUDA project that will crunch data 3X faster - data that still won't be analyzed. me@rescam.org |
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