Own feed data plots

[aaamot]

Thanks for the reply !
Since I first saw the reply, I have read a lot about ADS-B and MLAT
and found that the planes that I miss on the map, does not i fact send their position.
Just ID.

If you have contact with an aircraft, but due to the antenna or signal strength it is not meeting the 2 per second data hits, It may not fall into the category as a stable position for the server to decide it can be tracked sucessfully.

Another question ;
Is there a way for me to see how the quality of my signal is ?
As of now I see "sendt 1 AC in 1 packet" that confirms to me that I in fact are recieving a signal.
But I do not see if the signal is optimal.
both according to pr second data hits, or information quality ..
Maybe I missed something, but since I run the FR24feed on an old computer it would be fine to see if my equipment is good enough, or not...

Regards from a noobie in Norway
Asbjørn

[16R]

Qualify of my signal

Another question ;
Is there a way for me to see how the quality of my signal is ?
As of now I see "sendt 1 AC in 1 packet" that confirms to me that I in fact are recieving a signal.
But I do not see if the signal is optimal.
both according to pr second data hits, or information quality ..
Maybe I missed something, but since I run the FR24feed on an old computer it would be fine to see if my equipment is good enough, or not...

Regards from a noobie in Norway
Asbjørn

Hi Asbjørn, I use pi connected with a RTL-SDR dongle, I run dump1090 --interactive to monitor the health of my received data as dump1090 sends the data to fr24 I can see the qualify of data I am feeding it. I watch the "Sig" signal strength from each entry to give me a feel of how strong each signal I am receiving.

If you have not upgraded you antenna I recommend looking into that, the stock antenna that comes with the dongle doesn't work as well as a "real" antenna tuned to 1090Mhz.

I don't think an old computer makes a difference as there isn't alot of CPU power required to do this stuff.

[aaamot]

Thanks.
I've got me an new RPI since last time, a better antenna, a 1090 filter, and an antenna amp, so the results are better now.
Running both the RPI and an old PC with W10.The amp has also a splitter buildtin so I feed both with the same antenna.

Ill find some images to show...

Regards, Asbjorn

[aaamot]

I also run VirtualRadar on the pc, merging the 2 signals, and therefore see the results of both.
The PC seems to give much more "bad signals" than the RPI, according to the interface for Virtualradar.
Since I live at the coastline in Norway, ( and here we have a lot of fjords, and mountains) a 360 free wiew is not possible, if I dont live on a mountain top
See Location where I live - use zoom to see more / less...

Regards, Asbjorn

[16R]

Thanks.

Ill find some images to show...

Regards, Asbjorn

Hi, what software tool are you using to make your distance plots?

[aaamot]

Hi, what software tool are you using to make your distance plots?

Raspberry PI, and feeding VirtualRadar running on a PC.
( VR picking up port 30003 on PI's IP....)

There is also a VirtualRadar for PI too, but I didn't get it installed there yet.
( I'm a windows / PC kind of man.... )

Dont know why, but the distance plots wouldn't plot with windows alone...

regards, Asbjorn.

[majo]

Hi Asbjørn, I use pi connected with a RTL-SDR dongle, I run dump1090 --interactive to monitor the health of my received data as dump1090 sends the data to fr24 I can see the qualify of data I am feeding it. I watch the "Sig" signal strength from each entry to give me a feel of how strong each signal I am receiving.

If you have not upgraded you antenna I recommend looking into that, the stock antenna that comes with the dongle doesn't work as well as a "real" antenna tuned to 1090Mhz.

I don't think an old computer makes a difference as there isn't alot of CPU power required to do this stuff.

Hi 16R,

where do you see the difference or result if you add "--interactive" to the additional dump1090 arguments?


Thanks,

majo

[16R]

Hi 16R,

where do you see the difference or result if you add "--interactive" to the additional dump1090 arguments?

majo

Hi majo, I had to use 'screen' to do it. Added a script to run after boot to started a screen session then I use ssh to view the running screen session. In my case, I run dump1090 on a standalone pi just for ADS-B, then I run ssh on another computer to monitor the running dump1090 in the screen session.

If anyone know of a better or easier way, please chime in.

The script: /usr/lib/fr24/run.see.dump1090.sh

# run.see.dump1090.sh
# 8/7/2016
#
# dump1090 gets started upon boot, but I dont' know how to then
# view the interactive output.  This script gets started via
# a screen session in /etc/rc.local.
# To view the interactive output screen -x to the session.
#
service dump1090 stop
#
# For the browser to work (IP:8080) you must be at the
# /usr/lib/fr24 when launching dump1090.  If you are not
# at /usr/lib/fr24 and launch via explicate path /usr/lib/fr24/dump1090
# then the browser does not work!
cd /usr/lib/fr24
./dump1090 --net --net-beast --modeac --mlat --interactive --interactive-ttl 30

Inserted this in /etc/rc.local just before the 'exit 0' entry at the end of the file:

# Start the run.see.dump1090.sh in a screen session, because this is the
# only way I know how to see the dump1090 interactive output.
screen -dmS run.see.dump1090 bash -c 'cd /usr/lib/fr24; ./run.see.dump1090.sh; exec bash'

Then to view the session on the same or other computer:

screen -x run.see.dump1090

screen is a bit complicated to use, so it is best to learn how to use screen sessions to navigate it.