AIS

Show off any of your RTL-SDR or cheap SDR related projects.
marky9074
Posts: 3
Joined: Sun May 03, 2015 8:06 am

Re: AIS

Post by marky9074 » Sun May 03, 2015 8:19 am

Hi there,

I have a stick that is recognised under Zadig as RTL2838UHIDIR. I have the latest PNAIS 4.4 and have set the frequency correction to 55, then ticked both 'Use AGC' and 'Use RTL'. For the antenna I am using a coax collinear which I made myself, and had good results tracking aircraft. However, I am not getting anything using PNAIS (or AISRec)

Unfortunately I am actually on a ship, with a very slow connection, so cannot download .NET 3.5 to look at the signal in SDRSharp.

Just wondered if anybody else is using this chipset, and can give me some pointers for optimum settings.

Thanks in advance,

Mark

rtlsdrblog
Site Admin
Posts: 2321
Joined: Mon Nov 19, 2012 11:54 pm

Re: AIS

Post by rtlsdrblog » Sun May 03, 2015 10:19 pm

What frequency is your coax collinear tuned to? If you made it for ADS-B at 1090 MHz, it might not work so well for AIS at 162 MHz, though it probably should be able to pick up your ships own AIS signal if it's broadcasting.

Also, using manual gain instead of the AGC's will probably give you better reception.

marky9074
Posts: 3
Joined: Sun May 03, 2015 8:06 am

Re: AIS

Post by marky9074 » Mon May 04, 2015 11:20 am

Good point, I followed a guide on here (though cannot find it now) and made a three element array, so quite possibly it is tuned for ADS-B

I'll give it a go on manual gain..

Edit: Actually I made the 120cm one in this guide:
http://sdrformariners.blogspot.ie/p/blog-page.html

marky9074
Posts: 3
Joined: Sun May 03, 2015 8:06 am

Re: AIS

Post by marky9074 » Tue May 05, 2015 9:36 am

OK, got good results with AGC ticked on both and ppm 72/73 (got my first hit on 56ppm and kept going up until I got equal on A & B).
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