Installed dump1090-muta v1.15~dev; VRS not showing MLAT pos

Today I installed dump1090-muta v1.15~dev and noticed that the MLAT positions aren’t showing in VRS anymore. This is v2.2.0.551 of VRS, which is supposed to be MLAT aware. I looked in options and don’t see anything about enabling MLAT. Should be automatic, shouldn’t it? Right now it’s showing 101 aircraft, but only tracking 29. When I was running dump1090-muta v1.14 the MLAT aircraft were showing up in VRS. The receiver is set for AVR or Beast Raw Feed and port 30005, same as before. Any ideas?

By the way, the dump1090 web feed looks very nice and it is showing the MLAT positions.

From the Piaware log:


10/22/2015 22:33:37 mlat(25108): Receiver status: connected
10/22/2015 22:33:37 mlat(25108): Server status:   synchronized with 28 nearby receivers
10/22/2015 22:33:37 mlat(25108): Receiver:  364.9 msg/s received      6.1kB/s from receiver
10/22/2015 22:33:37 mlat(25108): Server:      1.7 kB/s from server    0.0kB/s TCP to server   4.1kB/s UDP to server
10/22/2015 22:33:37 mlat(25108): Results:  771.9 positions/minute
10/22/2015 22:33:37 mlat(25108): Aircraft: 78 of 91 Mode S, 19 of 26 ADS-B used
10/22/2015 22:37:01 7839 msgs recv'd from dump1090-muta (1206 in last 5m); 7461 msgs sent to FlightAware


Dump1090-mutability log:


Statistics: Thu Oct 22 17:05:46 2015 UTC - Thu Oct 22 22:02:10 2015 UTC
Local receiver:
  42681892864 samples processed
  0 samples dropped
  0 Mode A/C messages received
  267232969 Mode-S message preambles received
    164653660 with bad message format or invalid CRC
    98237950 with unrecognized ICAO address
    4054726 accepted with correct CRC
    286633 accepted with 1-bit error repaired
  -12.1 dBFS mean signal power
  -0.8 dBFS peak signal power
  87420 messages with signal power above -3dBFS
Messages from network clients:
  0 Mode A/C messages received
  496629 Mode S messages received
    0 with bad message format or invalid CRC
    0 with unrecognized ICAO address
    496629 accepted with correct CRC
    0 accepted with 1-bit error repaired
4837988 total usable messages
53 surface position messages received
522330 airborne position messages received
497795 global CPR attempts with valid positions
536 global CPR attempts with bad data
  529 global CPR attempts that failed the range check
  0 global CPR attempts that failed the speed check
681 global CPR attempts with insufficient data
22816 local CPR attempts with valid positions
  20166 aircraft-relative positions
  2650 receiver-relative positions
1236 local CPR attempts that did not produce useful positions
  255 local CPR attempts that failed the range check
  924 local CPR attempts that failed the speed check
0 CPR messages that look like transponder failures filtered
504926 non-ES altitude messages from ES-equipped aircraft ignored
2109 unique aircraft tracks
618 aircraft tracks where only one message was seen
CPU load: 27.9%
  3325014 ms for demodulation
  1438378 ms for reading from USB
  199014 ms for network input and background tasks
Thu Oct 22 22:02:10 2015 UTC  Normal exit.
Thu Oct 22 22:02:11 2015 UTC  dump1090-mutability v1.15~dev starting up.
Using sample converter: UC8, integer/table path
Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000001 (currently selected)
Found Rafael Micro R820T tuner
Using automatic gain control.
Gain reported by device: 0.00 dB


Take a look on ads-b-flight-tracking-f21/vrs-show-both-dump1090-adsb-and-fa-mlat-positions-t36086.html

Was about to mention that post. Instructions worked to a tee with my dump1090-mutability v1.5~dev installation.

Thank you for pointing me in the right direction and thank YOU mgunther for the help!

Yup! Perfect instructions. Next step is to back up my VRS server so I don’t have to relearn it all again some other time!! :smiley: