With VRS? It should be, iirc you can merge the feeds of two feeders, so you probably can make a adsb feed, a mlat feed and then a combined feed of the two?!
I may be mistaken, some will say I always am , but VNC is useful as a remote desktop, which implies a GUI. There is no GUI in Piaware by default, but it can be installed.
I do use VNC, with the full version of Raspbian. With Piaware, I use Putty.
With VRS? Sure. Create a Merged feed using the VRS ‘receivers’ you have now, typically your RTL-SDR dongle and MLAT (if enabled), but you may have more than two VRS ‘receivers’ set up.
you may need to install openssl and/or libssl-dev and reboot. sudo apt-get install -y libssl-dev
I think though that you want modesmixer to feed your planeplotter in which case
it is easier to run modesmixer in your PC.
you need the runtime executables msvcr / msvcp you can download from Microsoft.
then in the modesmixer folder add / edit a file mm2.bat.
add the following lines and run it.
echo "modesmixer v 9/2017 - web 9779"
@echo off
cmd /c mm2.exe ^
--web 9779 ^
--location your LAT:your LON ^
--inConnect your RPi IP:30005 ^
--inConnect your RPi IP:30105 ^
--outServer beast:40005
PAUSE
exit
now change the PP line for the receiver 127.0.0.1:40005
note: you must download the windows version from xdeco.org
note: you can rename modesmixer2.exe to mm2.exe. if not then the above cmd line
must change to cmd /c modesmixer.exe ^
note: on your browser enter 127.0.0.1:9779 to view the modesmixer output.
note: in RPi SSH must be enabled via raspi-config or via an empty file named ssh.