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BILLY
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Message 1195617 - Posted: 15 Feb 2012, 16:13:45 UTC

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?

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Message 1195628 - Posted: 15 Feb 2012, 16:58:31 UTC - in response to Message 1195617.

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
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BILLY
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Message 1195633 - Posted: 15 Feb 2012, 17:06:57 UTC - in response to Message 1195628.

thank you for your reply.

Profile Paul
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Message 1205637 - Posted: 14 Mar 2012, 2:01:41 UTC

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

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Message 1205648 - Posted: 14 Mar 2012, 2:47:42 UTC - in response to Message 1205637.

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
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Message 1205649 - Posted: 14 Mar 2012, 2:49:30 UTC - in response to Message 1205637.

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

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.
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Message 1206194 - Posted: 15 Mar 2012, 16:47:09 UTC

Many thanks for you quick response to my question about AstroPulse.

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Message 1206643 - Posted: 16 Mar 2012, 17:22:21 UTC - in response to Message 1206194.
Last modified: 16 Mar 2012, 17:30:52 UTC


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)


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Message 1206726 - Posted: 16 Mar 2012, 22:35:16 UTC - in response to Message 1206643.


(AstroPulse was different Project years ago but was then merged with/in SETI@home Project)

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).
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Message 1229556 - Posted: 9 May 2012, 15:48:03 UTC

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 ?

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Message 1229659 - Posted: 9 May 2012, 18:52:19 UTC - in response to Message 1229556.

the MB app does look for Gaussians.
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