Cheapest way to feed FR24 / Anyone using RTL-2832u-R820t usb dongle ?

[sharonna]

Im also using the R820T dongle with ADSB# and ADSBScope since a few days.
Im using a homebrew Antenna posted by Emmanuel here: http://www.kinetic-avionics.co.uk/fo...=7489&start=15
Its construction is based on vk4tec schematics and G-7RGQ and TrueTrack notes.

My Version of it is encased in a 40mm PVC Pipe and uses an N Connector, mounted on my Balcony in the 1st floor.
Connected via 5m RG-213 Coax Cable with N Connectors.

Im really happy with the results, since im surrounded by mountains, and the antenna positions is not optimal (Antenna is surrounded by 5 Story Buildings).

coverage.jpg

Regards
Martin

[imokruok]

Untitled-1.jpg

I'm using the R820T dongle with ADSB#, and I couldn't be happier with the results. My location (T-LAX2) is an apartment 3 stories up under the "Santa Monica" text in the attached map, and the antenna is a 20 inch whip with mag mount that is meant for 144/440 ham radio. It's indoors on top of my desk against a wall.

Yet it tracked the HAL (Honolulu Air) flight for an impressive amount of time...

[jestemradek]

Interesting, thank you. Where did you find --net-ro-port?

just try ./dump1090 --help


Recently someone told me that the MLAT requires two things:
a) frames ADS-B
b) very accurate-time of receiving each frame (time from GPS)

Accuracy reaches 0.000001 sec...

The USB port has a slight delay, that rtl's devices are useless to the service MLAT.

MLAT need ADS-B receiver hardware-integrated with GPS.
Only this can guarantee a very precise time of received frames.

Can anyone confirm this?



Regards
Radek

[vortex]

Interesting, thank you. Where did you find --net-ro-port?
It still didnt work though. Look at the message in the left bottom. All the blue aircraft are "mine".
I use the settings for "AVR receiver"

[jestemradek]

Try dump1090 like that:

./dump1090 --net --net-ro-port 30002

Regards
Radek

[vortex]

I have dump1090 and rtl_asdb working on raspberry. Both do an excellent job in forwarding data to fr24 and adsbscope.
The issue I have is with planeplotter. I can feed data to it directly or via adsbscobe but on port 30002 I can't get it to receive raw data for mlat.
Is it because the raw data is not coming from the raspberry?

[jestemradek]

I'm using R820T.
When using rtl_adsb it produce much more avr format.
But also with more error packet.

Did you already tested dump1090 with option --enable-agc?


Regards
Radek

[digitizing]

which device do you have? R820T or E4000?



In my opinion dump1090 with option --enable-agc grabs 20% more frames.

Regards
Radek

I'm using R820T.
When using rtl_adsb it produce much more avr format.
But also with more error packet.

[jestemradek]

In my opinion dump1090 with option --enable-agc grabs 20% more frames.

Regards
Radek

which device do you have? R820T or E4000?



In my opinion dump1090 with option --enable-agc grabs 20% more frames.

Regards
Radek

[digitizing]

I just using this command
./dump1090 --net --net-sbs-port 30003 --interactiv
compared with rtl_adsb, for me rtl_adsb is much better than dump1090.

[digitizing]

Try lastest version from git of dump1090

git clone https://github.com/antirez/dump1090.git
cd dump1090
make

and use option like that:
./dump1090 --net --net-sbs-port 30003 --interactive --enable-agc

and FR24 like that:
./fr24feed_arm-le_225 --fr24key=your_share_key --bs-ip=127.0.0.1 --bs-port=30003

Regards
Radek

wow it's a good news,
i'll try it soon, while building 5V regulator using LM2576-5
for powering my raspberry pi using POE.

[deconz]

Yes, dump1090 is far better. I have currently very bad antenna and gr_air_modes catches the signal only when planes are within 20 kilometers. Dump1090 can find a plane as far as 150 kilometers away. It is more CPU-friendly, too.

WOW, that's impressive. However, from my location I saw traffic at 190nm with the mini antenna supplied with the dongle!!! I will try dump1090 and report back.

[web]

How about the results? Better than gr_air_modes?

Regards
Radek

Yes, dump1090 is far better. I have currently very bad antenna and gr_air_modes catches the signal only when planes are within 20 kilometers. Dump1090 can find a plane as far as 150 kilometers away. It is more CPU-friendly, too.

[jestemradek]

Thank you, --net-sbs-port did the trick (I had an old version and the function was not implemented yet!)

How about the results? Better than gr_air_modes?

Regards
Radek

[web]

Thank you, --net-sbs-port did the trick (I had an old version and the function was not implemented yet!)