First signal

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Farrout
Posts: 13
Joined: Wed Mar 02, 2016 7:34 pm

First signal

Post by Farrout » Sun May 08, 2016 5:26 pm

On May 8, 2016 at 01:58 UT, I received this signal.

It was intermittent, it did not fade on and off, but changed abruptly.

Here is a link to a short youtube video.
https://www.youtube.com/watch?v=_NyzhnEXk2s

Coordinates, taken from Stellarium, are:
RA 11 29 42
DEC -16 41 9

Complete details on the radio telescope are at:
http://www.farrout.org/wp/farrout/radio-telescope

This is my first session with this setup, and my first signal.
First research indicates there is a gamma ray pulsar near those coordinates.

This was done with SDR#. I tried to use RTLBridge, but the signals weren't coming in.

I would appreciate any comments.

Thanks

Dennis
WB4RJK

rtlsdrblog
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Posts: 2784
Joined: Mon Nov 19, 2012 11:54 pm

Re: First signal

Post by rtlsdrblog » Sun May 08, 2016 10:52 pm

I don't really know much about radio astronomy, but i'm fairly certain that signal is a human generated signal. Natural signals usually aren't a nice strong single tone like this. It was probably some sort of beacon from a satellite, or maybe even a ground based beacon leaking in.

Have a look at this document http://www.y1pwe.co.uk/RAProgs/AmateurP ... ctionF.doc. There is a fair bit more post processing work involved than just using SDR# to be able to detect a pulsar. Basically it seems that he uses rtl_sdr to record the signal at the hydrogen line freq of 1420 MHz, and then uses a program called rapulsar to integrate the data and detect the pulsar rotation period. It also seems that there are only a few pulsars detectable by amateurs such as the Vela pulsar. EVen for that one they estimate that to detect the Vela puslar the smallest usable dish is 6 meters.

http://www.rtl-sdr.com/?s=pulsar
http://y1pwe.co.uk/RAProgs/index.html

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Posts: 613
Joined: Sun Oct 09, 2016 7:27 am

Re: First signal

Post by Username » Sun Oct 09, 2016 8:16 am

Amateur Radio operates also somewhere in that Area.

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