ADSB Beginner Advice Please.

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mike_k_houghton
Posts: 1
Joined: Fri Jun 26, 2020 8:13 am

ADSB Beginner Advice Please.

Post by mike_k_houghton » Fri Jun 26, 2020 8:29 am

Hi,I
I'm new to this subject and would really appreciate some advice!
My top level use case is - I'd like to receive aircraft tracks from ADSB and get that data into a .NET C# application that
I will write.

I'm thinking of using (from Amazon)
"NESDR Mini 2 USB RTL-SDR & ADS-B Receiver Set, RTL2832U & R820T2 Tuner,
MCX Input. Low-Cost Software Defined Radio Compatible with Many SDR Software Packages.
R820T2 Tuner & ESD-Safe Antenna Input"

Once I've set up the NESDR how do I get the data it receives into my own bit of C# code?

Many Thanks
Mike

Stromeko
Posts: 35
Joined: Wed May 01, 2019 6:32 pm

Re: ADSB Beginner Advice Please.

Post by Stromeko » Sat Jun 27, 2020 7:05 am

mike_k_houghton wrote:
Fri Jun 26, 2020 8:29 am
I'm new to this subject and would really appreciate some advice!
My top level use case is - I'd like to receive aircraft tracks from ADSB and get that data into a .NET C# application that I will write.

I'm thinking of using (from Amazon)
"NESDR Mini 2 USB RTL-SDR & ADS-B Receiver Set, RTL2832U & R820T2 Tuner,
MCX Input. Low-Cost Software Defined Radio Compatible with Many SDR Software Packages.
R820T2 Tuner & ESD-Safe Antenna Input"

Once I've set up the NESDR how do I get the data it receives into my own bit of C# code?
I would rather use a dongle that has an SMA connector unless you really specifically want MCX. Unless you are very close to an airport or directly under an airway you will also want a proper ADS-B antenna and a filtered ADS-B LNA. There are some dongles that have the filter built in, depending on where you can place the antenna and the dongle this can be almost as good as having a separate LNA and is a little less cumbersome to set up (you don't need a bias-tee or a dongle that has one built in). You can build a pretty good antenna yourself, but for best performance you need to tune it. For that you need access to either a VSWR bridge (antenna tuner) or better yet a VNA. If you have a HAM club in your vicinity they probably have one that they might let you use.

If you are really only interested in getting the data from the dongle so you can play with your software, one of the bundles that has the antenna and ADS-B filtered dongle might be the better starting point. These are currently not well stocked it seems, so you might need to look around a bit. As for the data, you can either run a dedicated ADS-B decoder and tap into the decoded messages stream (even via network, so your program and the decoder don't have to run on the same computer) or just get the raw samples from the SDR and do the decoding yourself (I'm not sure C# would be fast enough to do that, but depending on what computer you run it on maybe it is).

alanzfq
Posts: 144
Joined: Thu Oct 04, 2018 11:18 am

Re: ADSB Beginner Advice Please.

Post by alanzfq » Sat Jun 27, 2020 9:13 am

Yes, the one Mike is looking at is not adapted for ADSB at all. No filter, simple whip.
It might eventually show some results but as he wants to specialise then should follow your advice.
Alan

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