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SETI@home Science :
VLARs, MB, & Astropulse Analysis
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ML1 Send message Joined: 25 Nov 01 Posts: 20289 Credit: 7,508,002 RAC: 20 |
Despite the pain VLARs cause for the MB CUDA crunchers, do we get any additional science from them? Can Astropulse make a 'deeper' analysis of a particular region of space when Arecibo is tracking a single point? Keep searchin', Martin See new freedom: Mageia Linux Take a look for yourself: Linux Format The Future is what We all make IT (GPLv3) |
skildude Send message Joined: 4 Oct 00 Posts: 9541 Credit: 50,759,529 RAC: 60 |
No No AP is looking at broadband data vs. narrowband on MB. Deeper? generally speaking seti is looking for repeated results from the same point in the sky. with any luck that point is near a star In a rich man's house there is no place to spit but his face. Diogenes Of Sinope |
Josef W. Segur Send message Joined: 30 Oct 99 Posts: 4504 Credit: 1,414,761 RAC: 0 |
Despite the pain VLARs cause for the MB CUDA crunchers, do we get any additional science from them? Yes, Astropulse sensitivity is best at VLAR though very little is lost up to motion like what gives MB midrange ARs like ~0.4. That's 8 beamwidths of motion for MB, but just 1 for Astropulse WUs since they only have 13.42 second duration. The motion doesn't matter for the single pulse analysis which only deals with 1/1024 the duration, nor for the short period repetitive pulse analysis since it only deals with 1/32 the duration. The long period repetitive pulse analysis includes the full duration, so 1 beamwidth of motion means the beginning and end are down about 3 db. For MB, VLARs are also the most sensitive for pulse and triplet finding, the full duration of 107.37 seconds is in one beam width so the app is working with maximum data. The real issues with VLAR are that it would take years of telescope time to get full Arecibo sky coverage with 107 seconds integration time, and the VLAR data we do get is often reobservation of the same target. Joe |
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