Is there any way to combine two PiAware to report as one?
I have 2 about 50 feet apart but one can only see NE and the other
can only see SW. There is only about 5 degrees overlap in the NW
and SE directions.
What I would like to do is using one or more netcat programs (nc)
send all data (probably only need port 30003) from A to B and
disable A from report direct to flightaware.
PS
port 30003 is all messages in asciii. Is there a better port in binary?
What is the correct port to send to on host B so it incorporates the data?
Friend of mine is operating a Raspberry with two sticks on a church tower. Reason is that there is a concrete wall in between. So he has two feeders set up as once, but at the same location. And it shows “MLAT connected”
So there might be some circumstances where it is working
If you’ve got two separate receivers and you haven’t done anything to ensure that they’re providing synchronized timestamps (practically speaking, that means using a receiver that does GPS timestamping of messages in hardware) then no it’s not working. It may be connected, but the client will be yelling at you about out-of-order timestamps and the server will just be ignoring your data.
That’s quite an improvement. What is the receiver based on? I assume that it has considerably better dynamic range than the dongles 8 bit ADC. Is it software based, or are you using an FPGA?
The question is if it’s 2 stations in the FA stats, if not the MLAT won’t work.
Whatever you post here will not persuade either me or obj because we both understand how the synchronization works.
Not sure you can look at the exact configuration on the feed client and how it’s wired together.
Because that would be where you can learn what’s happening or actually contribute something useful except for handwaving.
You didn’t read it correctly, the GPS needs to built into the ADS-B receiver to timestamp the data / messages.
So standalone GPS modules are besides the point.
Sure there should be 1090 MHz FPGA based receivers available. When I searched, although I found some on Amazon & eBay, but none mentioned 1090 MHz or ADS-B. The cheapest FPGA based receiver I found was $60. Most were in $200 to $400 range.
Instead of using two antennas and two dongles, then combining output of two dongles, why not combine two antennas to feed only one dongle? The Splitter/Combiner attenuation can be compensated by LNA.
This is slightly black magic, since you just unintentionally built a little phased array.
More generally, it depends on the reason for having two antennas. If you’ve got an obstructed view … maybe … but I’d still just go with two independent receivers. If you’re trying to sectorize your reception to reduce garble then combining the signals is counterproductive.
