SDRuno: best settings for AIS decoding?

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Joba
Posts: 4
Joined: Sun Nov 06, 2016 1:27 am

SDRuno: best settings for AIS decoding?

Postby Joba » Sun Aug 12, 2018 11:49 am

Hello group,

I am trying to decode AIS messages using SDRuno and MultiPSK, but experience short range and
incomplete messages. Even from merchant ships I just get a few km, although my outside full size antenna is
balcony mounted about 15 meters above ground.

My settings now: sampling rate 2 MHz, LNA+AGC on. NFM, 12 k filter, no squelch, FM DEEM off.

What would be the best settings? What are you using?
Last edited by Joba on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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Mikesimpson
Posts: 6
Joined: Wed Jul 04, 2018 10:53 pm

Re: SDRuno: best settings for AIS decoding?

Postby Mikesimpson » Sun Aug 12, 2018 10:30 pm

Unless you have a QTH on a cliff top overlooking the sea, AIS traffic is difficult to copy over 30km or so inland.

Mike

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Joba
Posts: 4
Joined: Sun Nov 06, 2016 1:27 am

Re: SDRuno: best settings for AIS decoding?

Postby Joba » Wed Aug 15, 2018 4:05 am

Thank you for reply.

I installed the AISRecFullWin software and experienced a lot better result. It is decoding both frequencies and is using
all AIS message types to extract information (MultiPSK seems not?). More than 90% of the received messages are complete.

RX range is also better, now about 15-20 km in the best direction from big ships.
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mark.
Posts: 38
Joined: Tue Oct 03, 2017 9:14 pm

Re: SDRuno: best settings for AIS decoding?

Postby mark. » Thu Aug 16, 2018 12:55 pm

I am receiving small blips at those 2 frequencies so I assume those are the AIS signals. I'm about 7 miles west and uphill from the Lake Michigan shoreline in Milwaukee with a 2 meter antenna at the top of my 40 foot tower. So I'm probably set up for good reception. What type of messages are you decoding?

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Joba
Posts: 4
Joined: Sun Nov 06, 2016 1:27 am

Re: SDRuno: best settings for AIS decoding?

Postby Joba » Fri Aug 17, 2018 8:55 pm

This is my message statistics after about 15 minutes of listening.

Image
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