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astropulse
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BILLY Send message Joined: 22 Aug 11 Posts: 7 Credit: 682,074 RAC: 0 |
astropulse v505 5.05 wu's 931699328 & 931702607.both workunits only ran for about four seconds,one has been validated the other is waiting to report.They should have ran for 24 hours.Is this normal? |
Gundolf Jahn Send message Joined: 19 Sep 00 Posts: 3184 Credit: 446,358 RAC: 0 |
From the stderr output of task 2313485600: Error in ap_remove_radar.cpp: generate_envelope: num_ffts_performed < 100. Blanking too much RFI? There's been obviously not enough data besides the Radio Frequency Interference (radar) to process any longer. Gruß, Gundolf Computer sind nicht alles im Leben. (Kleiner Scherz) SETI@home classic workunits 3,758 SETI@home classic CPU time 66,520 hours |
BILLY Send message Joined: 22 Aug 11 Posts: 7 Credit: 682,074 RAC: 0 |
thank you for your reply. |
Paul Send message Joined: 29 Feb 12 Posts: 4 Credit: 840,712 RAC: 0 |
What is Astropulse. I have been running SETI but now I see a task running called Astropulse among my seti tasks. Did a search in Q&A but didn't find anything. Paul |
skildude Send message Joined: 4 Oct 00 Posts: 9541 Credit: 50,759,529 RAC: 60 |
Astropulse is a similar type of work as the multibeam project. WU's are 8MB and can run very short if RFI is found a little longer (~90 minutes on a fast GPU), A little slower on a fast CPU using the Lunatics optimized app(6-16 hours, or slowly (20-100+ hour) on an average CPU or slower. You'll need to make sure you have astropulse v5.05 checked off in your s@h preferences. It appears that v6 will be coming soon so if you want v6 astropulse check that as well In a rich man's house there is no place to spit but his face. Diogenes Of Sinope |
John McLeod VII Send message Joined: 15 Jul 99 Posts: 24806 Credit: 790,712 RAC: 0 |
What is Astropulse. I have been running SETI but now I see a task running called Astropulse among my seti tasks. Did a search in Q&A but didn't find anything. SETI@Home runs two different searches through the same radio data. MultiBeam (Normal SETI tasks) are looking for narrow band pulses. AstroPulse is looking for wide band pulses. Unfortunately, the data has to be divided differently for the two different sorts of task. The raw data is divided into several bands (256?) for MB. However, AP tasks gets a block that is the entire bandwidth. If MB processing was done on the full bandwidth, it would take a couple of weeks of processing on most machines, and back when this was originally done, it would have taken a year or more of processing per task. In both cases, the raw data is divided up into sections that are about a minute and a half long - with enough overlap so that the processing is continuous. BOINC WIKI |
Paul Send message Joined: 29 Feb 12 Posts: 4 Credit: 840,712 RAC: 0 |
Many thanks for you quick response to my question about AstroPulse. |
BilBg Send message Joined: 27 May 07 Posts: 3720 Credit: 9,385,827 RAC: 0 |
From the HOME page you may also click "About Astropulse" and get to this info: http://setiathome.berkeley.edu/ap_faq.php Another info here: http://www.boinc-wiki.info/SETI@Home (AstroPulse was different Project years ago but was then merged with/in SETI@home Project) Â - ALF - "Find out what you don't do well ..... then don't do it!" :) Â |
John McLeod VII Send message Joined: 15 Jul 99 Posts: 24806 Credit: 790,712 RAC: 0 |
It was never actually a separate project - unless you include the Beta test site (which used to test all new versions of SETI and AstroPulse applications). BOINC WIKI |
Paul Send message Joined: 29 Feb 12 Posts: 4 Credit: 840,712 RAC: 0 |
So after reading astropulse in what it does, I am still wondering about detecting spread spectrum signals. Any civilization even somewhat advanced from us would probably be using spread spectrum, or even frequency/power spreading methods unknown or yet to be developed. So my question is: Is asropulse capable of detecting spread spectrum ? |
skildude Send message Joined: 4 Oct 00 Posts: 9541 Credit: 50,759,529 RAC: 60 |
the MB app does look for Gaussians. In a rich man's house there is no place to spit but his face. Diogenes Of Sinope |
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