the "beep-beep" AP pattern

Message boards : Number crunching : the "beep-beep" AP pattern
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Author	Message
merle van osdol Send message Joined: 23 Oct 02 Posts: 809 Credit: 1,980,117 RAC: 0	Message 1565438 - Posted: 31 Aug 2014, 16:13:37 UTC Is there any way to explain to a layman how one might distinguish a potential "beep-beep" AP pattern from mere static or background radio noise? There I go again, biting off more than I can chew. ID: 1565438 ·
bill Send message Joined: 27 Apr 12 Posts: 171 Credit: 2,167,701 RAC: 0	Message 1565442 - Posted: 31 Aug 2014, 16:19:06 UTC It would be a regular patent like when we generate power at 60 mhz it could be a signal sent or one made by machine, but the other signals would not normaly have a regular patern ID: 1565442 ·
merle van osdol Send message Joined: 23 Oct 02 Posts: 809 Credit: 1,980,117 RAC: 0	Message 1565446 - Posted: 31 Aug 2014, 16:30:38 UTC - in response to Message 1565442.   Are there any graphs available that show different radio patterns like the one from your example for a 60mhz signal, or say a pattern from a supernova or a pulsar all on a broadband scale. I think I could understand it much better if I could see these various signals on paper. ID: 1565446 ·
bill Send message Joined: 27 Apr 12 Posts: 171 Credit: 2,167,701 RAC: 0	Message 1565452 - Posted: 31 Aug 2014, 16:56:22 UTC - in response to Message 1565446.   It's will be a very weak signal, some how they remove signals that are knowen like local radio interferance then look for spikes that are at regular patents i don't know much more, than its very complex process and the area althought small we look at take a lot of data processing ID: 1565452 ·
Josef W. Segur Volunteer developer Volunteer tester Send message Joined: 30 Oct 99 Posts: 4504 Credit: 1,414,761 RAC: 0	Message 1565487 - Posted: 31 Aug 2014, 18:38:40 UTC You should probably think "tick-tick" rather than "beep-beep". http://setiathome.berkeley.edu/ap_chirp.php illustrates how a narrow pulse is made up of many frequencies, and why dedispersion is needed. The first Pulsar discovered was CP1919. In 2012, an audio recording was made of that one at the Parkes observatory in Australia. That 19 MB file can be downloaded from http://www.atnf.csiro.au/research/pulsar/audio/CP1919.wav. Joe ID: 1565487 ·
merle van osdol Send message Joined: 23 Oct 02 Posts: 809 Credit: 1,980,117 RAC: 0	Message 1565522 - Posted: 31 Aug 2014, 21:44:24 UTC - in response to Message 1565487.   OK, time for me to put on my thinking cap if it still works. Thanks Joe ID: 1565522 ·
tbret Volunteer tester Send message Joined: 28 May 99 Posts: 3380 Credit: 296,162,071 RAC: 40	Message 1565547 - Posted: 31 Aug 2014, 22:39:49 UTC - in response to Message 1565438.   Is there any way to explain to a layman how one might distinguish a potential "beep-beep" AP pattern from mere static or background radio noise? There I go again, biting off more than I can chew. http://setiathome.berkeley.edu/ap_signals_031709.php ID: 1565547 ·
merle van osdol Send message Joined: 23 Oct 02 Posts: 809 Credit: 1,980,117 RAC: 0	Message 1565563 - Posted: 31 Aug 2014, 23:40:20 UTC - in response to Message 1565547.   Thanks tbret, It helps. ID: 1565563 ·

 
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