Differences in number of planes shown?

I have two feeds to ADSB Exchange Shalom1 and Shalom2
In the last week:
Shalom2 is only showing half the amount of planes than Shalom1
Feeds are from 2 different Raspberry Pi's
Shalom 1 uses adsb receiver net image
Shalom 2 uses adsbx custom image
Two different Flight aware pro sticks and filters and flight aware collier antennas
Shalom1 has connected to more other mlat sites than shalom2

Your thoughts?
Thank you

 

Twice as many planes?

No differences in the dump1090 software. Custom image simply uses Grafana & prometheus to have a dashboard.

Is everything identical? has anything changed?

 

I assume you're talking about two stations set in the same place, or really very close to each other.
It might be due to different gain and/or options on the dump1090 launch line, but if you didn't change
anything lately I would suspect faulty hardware...any lightning storm?

 

Which file do i check dump1090 mutabilty options?

 

Twice as many planes are shown in the dump1090 map
How do i check dump 1090 parameters/options/gain ?
Everything appears identical
No changes have been made
The difference that i notice is in the mlat sync table where my feeder shalom1 is synced with more feeders than shalom2
Yes the two stations are located at the same place

 

yes I seen the programs running in htop
How do i see paramters in htop?
The forum software is not allowing me to post screen dumps
With just the adsbx image how do you check the dump1090 mutabilty options?

 

Thank you MDA in the dump 1090 mutabilty file the wrong LAT and LON were passed
Which file do i check and edit for adsbx custom name and port? referring to the adsbx image?

 

It does not have my custom details there?
Do i add them here ?

I have already got a custom feed name and port
Shalom2 is Australia

 

If you are using the adsbx custom image then just change what you need to in the /boot/adsb-config.txt

 

Thanks James
My setup is correct for a custom port and name in the adsb-config.txt for the custom adsbx image for shalom2
However on the custom feed map on adsbx shalom2 feed shows about half the planes shalom1 feed ??

I like the Grafana interface perhaps MDA might write a tutorial on how to add this to a Raspberry Pi ?
Many thanks for all your good work James and MDA

 

Then you have an issue with the antenna, cable, or maybe the SDR on one of them, There is no software difference on the 1090 dump decoding side between the FA, ADSBx, and whoever else Pi images.

Did you say you had the wrong latitude and longitude?

 

Thanks James for your reply
Referring to the adsbx image
The adsb-config.txt has always had the correct parameters however the lat and lon were not passed over correctly to the dump1090 mutabilty file

 

That would do it. There was a bug in an old image that prevented lat lon variables in a few cases; so it might account for the issue. It should be fixed in newer images, however.


Add this to adsbexchange-dump1090_maint.sh

export MLATITUDE=$MLATITUDE
export MLONGITUDE=$MLONGITUDE

Don't change anything else in the script just add those lines.

This cropped up when someone was complaining about things running as root in early images. Caused more problems than it was worth - but at least no root. <rolls eyes>

Like so

 

I'm actually curious .. are you running two different image versions? This bug wasn't around very long.

Also - if you update to the newest ZeroTier or install ZeroTier on the Pi via SSH. I can login remotely and fix things if needed.


https://zerotier.com/download.shtml

Code:

curl -s 'https://pgp.mit.edu/pks/lookup?op=get&search=0x1657198823E52A61' | gpg --import && \
if z=$(curl -s 'https://install.zerotier.com/' | gpg); then echo "$z" | sudo bash; fi

Join this network
c7c8172af18c605f

Code:

sudo zerotier-cli join c7c8172af18c605f