MLAT question

I have been looking at the feeder stats. I can see I am now showing on the map and in the matrix. I can see I'm connected to MLAT server and sending data. However no range shows for me and I don't show as sync'd to any other users.

One thing I notice when trying to debug is the server time returned is a few minutes out

Code:

Fri Jun  8 05:33:33 2018 Receive: {'heartbeat': {'server_time': 1528435801.137}}

Where 1528435801.137 = 08/06/2018, 06:30:01

I'm in South Wales and there are a few other users not too far away so expected to sync traffic. I never see any MLAT traffic on my receiver, there seems to be no results from the server. I have debug logs if it helps.

 

Range? What do you mean by range? custom ports to do not show MLAT - MLAT only shows aggregated on the global feed and locally on your Pi. FA lawyers require no transmission of MLAT - so ADSBx saves it on the server side and sends it only to you local Pi installation.

 

Hi James.
Looking at the Western Europe Coverage maps, if I click on my feed, it shows no coverage (no coloured squares appear). The sync Matrix shows I'm not syncing with any other feeds either for some reason. Location data provided is accurate including height. I don't see MLAT on my pi at all. I don't get any results back from your MLAT server.

If it helps I enabled debug in MLAT client, here is some of the output showing my pi sending data

Code:

Jun 12 05:20:07 adsbx-custom rc.local[507]: Tue Jun 12 05:20:07 2018 Send: {'seen': ['405633', '405d66', '3965a7']}
Jun 12 05:20:07 adsbx-custom rc.local[507]: Tue Jun 12 05:20:07 2018 Send: {'lost': ['400ff2', '3949ed']}
Jun 12 05:20:07 adsbx-custom rc.local[507]: Tue Jun 12 05:20:07 2018 Send: {'rate_report': {'AA92FA': 0.54, 'AAEA8C': 0.06, '400773': 1.01, 'A4A445': 0.63, '40660E': 0.44, '406D39': 1.08, 'C01734': 0.44, '4BA94D': 0.09, '406752': 0.03, 'A2C094': 0.92, '4067F6': 0.22, '40622B': 0.73, '406AE8': 0.76, '485874': 0.85, 'A120F3': 0.25, '4CA54D': 0.38, '405BFC': 0.03, '4007ED': 0.92, '40073E': 0.7, '44A839': 0.63, '400A60': 0.85, '3C64F0': 0.54, 'ABDDFF': 0.47, '440095': 0.92, 'A491FB': 0.38, 'A8DEDA': 0.04, '440195': 0.38, '406A35': 0.16, '405633': 0.3, 'A1373D': 0.54, 'ABBEE3': 0.41, '3C6566': 0.35, '4007FB': 0.09, 'C00EC2': 0.25, '3964E9': 0.41, 'C03ABC': 0.66, 'C01755': 0.7, '440051': 0.32, 'AAE958': 0.92, '394A0D': 0.57, '4074D2': 0.7}}
Jun 12 05:20:12 adsbx-custom rc.local[507]: Tue Jun 12 05:20:12 2018 Receive: {'heartbeat': {'server_time': 1528780593.505}}
Jun 12 05:20:19 adsbx-custom rc.local[507]: Tue Jun 12 05:20:19 2018 Receive: {'start_sending': ['4ab42e', '400846']}
Jun 12 05:20:38 adsbx-custom rc.local[507]: Tue Jun 12 05:20:38 2018 Send: {'lost': ['89616c', 'abb3be']}
Jun 12 05:20:38 adsbx-custom rc.local[507]: Tue Jun 12 05:20:38 2018 Send: {'rate_report': {'AA92FA': 0.44, 'AAEA8C': 0.09, '400773': 0.51, 'A4A445': 0.44, '40660E': 0.54, '406D39': 0.79, '40073E': 0.66, '4BA94D': 0.16, '406752': 0.06, 'A2C094': 0.63, '4067F6': 0.09, '40622B': 0.63, 'C01734': 0.7, '485874': 0.95, '4074D2': 0.51, '4CA54D': 0.28, '405BFC': 0.09, '4007ED': 0.32, '44A839': 0.63, '400A60': 0.66, '3C64F0': 0.25, 'ABDDFF': 0.82, '440095': 0.63, 'A491FB': 0.6, 'A8DEDA': 0.38, '440195': 0.35, '406A35': 0.41, '405633': 0.16, 'A1373D': 0.6, 'ABBEE3': 0.6, '3C6566': 0.47, '4007FB': 0.22, 'C00EC2': 0.03, '3964E9': 0.38, 'C03ABC': 0.35, 'C01755': 0.85, '440051': 0.06, '406AE8': 0.51, '394A0D': 0.09, 'AAE958': 0.79}}
Jun 12 05:20:41 adsbx-custom rc.local[507]: Tue Jun 12 05:20:41 2018 Send: {'heartbeat': {'client_time': 1528780841.492}}
Jun 12 05:20:46 adsbx-custom rc.local[507]: Tue Jun 12 05:20:46 2018 Receive: {'start_sending': ['405633', '405d66', '3965a7']}
Jun 12 05:20:46 adsbx-custom rc.local[507]: Tue Jun 12 05:20:46 2018 Receive: {'stop_sending': ['400ff2', '3949ed']}
Jun 12 05:20:53 adsbx-custom rc.local[507]: Tue Jun 12 05:20:53 2018 Receive: {'heartbeat': {'server_time': 1528780634.273}}

Checked time on pi and it i accurate (at least to the second as that's the best I can check it), but it is set via ntp.

Any idea why I wouldn't sync with other feeders?

 

Looks like you are receiving MLAT data. What image are you using? If privacy is set to yes you won't show on the map dot.

 

I'll double check timezone. I think date shows UTC which, if I remember correctly, shows 1hr behind BST which would be correct. If you notice the received server time, it is a few minutes out to my client time in the logs.
Eg.
server_time': 1528780634.273 = Tuesday, June 12, 2018 5:17:14.273 AM. Yet my logs show time as
Jun 12 05:20:53. Both UTC time.

Could that be a reason for it? Although if that was it I would expect everyone to have issues.

Not at home currently so will check it out later.

What you say about on sync matrix is why I think something is wrong. Will let you know timezone.

James, privacy is off and I do show on coverage map.

 

Usb stick.

I'll get output of file later for you.

 

Hi MDA

Here is mlat.sh output.

Code:

#!/bin/bash

  if [ -f "/tmp/adsbx-params" ]; then
        . /tmp/adsbx-params
   else
        echo "MLAT ERR:  Configuration file does not exist."
        exit 1
   fi

if [ ${MLAT} = "no" ]; then
        exit 1
fi

# Find MAC of eth0, or if not exist wlan0
if [ -e /sys/class/net/eth0 ]; then
    MAC=$(cat /sys/class/net/eth0/address| cut -d ':' -f 4,5,6 | tr -d : )
elif [ -e /sys/class/net/enx* ]; then
    MAC=$(cat /sys/class/net/enx*/address| cut -d ':' -f 4,5,6 | tr -d : )
else
    MAC=$(cat /sys/class/net/wlan0/address | cut -d ':' -f 4,5,6 | tr -d : )
fi

if [ ${MLAT} = "yes" ]; then

   if [ -z ${ADSBXNAME} ]; then
        ADSBNAME='img_custom'
        ADSBXNAME=${ADSBNAME}+=$'_'${MAC}$'_'${IMGVER}
   else
        #ADSBXNAME+=$'_'${MAC}$'_'${IMGVER}
        ADSBXNAME=${ADSBXNAME}
        #-$(cat /sys/class/net/eth0/address | cut -d ':' -f 4,5,6 | tr -d : )
   fi

   if [ -z ${LATITUDE} ] || [ -z ${LONGITUDE} ]; then
     MLATITUDE=$(ps -eaf | grep [d]ump1090 | awk -F'--lat' '{print $2}' | awk '{print $1}')
     MLONGITUDE=$(ps -eaf | grep [d]ump1090 | awk -F'--lon' '{print $2}' | awk '{print $1}')

   else
        MLATITUDE=${LATITUDE}
        MLONGITUDE=${LONGITUDE}
   fi

  echo -e '\n Starting MLAT CLIENT WITH NAME' $ADSBXNAME 'LAT'  $MLATITUDE 'ALT' $ALTITUDE 'LONG' $MLONGITUDE

  while true
   do
    #ADSBexhchange script:  mlat-client --input-type dump1090 --input-connect localhost:30005 --lat $LATITUDE --lon $LONGITUDE --alt $ALTITUDE --user $ADSBXUSERNAME --server feed.adsbexchange.com:31090 --no-udp --results beast,connect,localhost:30104

    if [ $PRIVACY = "yes" ]; then
        /usr/bin/mlat-client --privacy --input-type dump1090 --input-connect localhost:30005 --lat $MLATITUDE --lon $MLONGITUDE --alt $ALTITUDE --user adsb-tesch-007 --server feed.adsbexchange.com:31090 --no-udp --results beast,connect,127.0.0.1:30104
    else
        /usr/bin/mlat-client --input-type dump1090 --input-connect localhost:30005 --lat $MLATITUDE --lon $MLONGITUDE --alt $ALTITUDE --user $ADSBXNAME --server feed.adsbexchange.com:31090 --no-udp --results beast,connect,127.0.0.1:30104
    fi

    sleep 10

  done
else
  exit 0
fi

Which runs this.

Code:

 2068 ?        S      0:00 /bin/bash /home/pi/adsbexchange-mlat_maint.sh
 2082 ?        S     92:49  \_ /usr/bin/python3.5 /usr/bin/mlat-client --input-type dump1090 --input-connect localhost:30005 --lat 5x.xxxxx --lon -3.yyyyyy --alt 201 --user adsb-tech-007 --server feed.adsbexchange.com:31090 --no-udp --results beast,connect,127.0.0.1:30104

Code:

dump1090-mutability ports
--net-bo-port 30005
--net-bi-port 30004,30104

time on pi is accurate to the sec when checking with time.is

Code:

Wed Jun 13 05:05:30 UTC 2018

 

Checked elevation using https://www.freemaptools.com/elevation-finder.htm and added approximate height (antenna is in attic). How accurate does it need to be?

Timezone changed. Will reboot and see what happens, may take some time to reconnect to MLAT server though

 

current stats

last1min":{"start":1528888799.3,"end":1528888859.3,"local":{"samples_processed":86114304,"samples_dropped":0,"modeac":1320,"modes":866750,"bad":544047,"unknown_icao":299527,"accepted":[21067,2109],"signal":-8.7,"noise":-20.3,"peak_signal":-0.8,"strong_signals":1286},"remote":{"modeac":1,"modes":0,"bad":0,"unknown_icao":0,"accepted":[0,0]},"cpr":{"surface":0,"airborne":1157,"global_ok":1018,"global_bad":0,"global_range":0,"global_speed":0,"global_skipped":3,"local_ok":124,"local_aircraft_relative":0,"local_receiver_relative":0,"local_skipped":15,"local_range":15,"local_speed":0,"filtered":0},"altitude_suppressed":0,"cpu":{"demod":18806,"reader":28238,"background":2711},"tracks":{"all":47,"single_message":16},"messages":24497},

"total":{"start":1528887719.1,"end":1528889399.3,"local":{"samples_processed":2457337856,"samples_dropped":0,"modeac":57994,"modes":24356501,"bad":15239991,"unknown_icao":8412527,"accepted":[652673,51310],"signal":-7.8,"noise":-18.9,"peak_signal":-0.8,"strong_signals":60900},"remote":{"modeac":28,"modes":0,"bad":0,"unknown_icao":0,"accepted":[0,0]},"cpr":{"surface":2,"airborne":33148,"global_ok":29381,"global_bad":1,"global_range":1,"global_speed":0,"global_skipped":79,"local_ok":3089,"local_aircraft_relative":0,"local_receiver_relative":0,"local_skipped":679,"local_range":677,"local_speed":0,"filtered":0},"altitude_suppressed":0,"cpu":{"demod":537978,"reader":806861,"background":70051},"tracks":{"all":1853,"single_message":625},"messages":762005}

 

Yes, I did notice signal was a little high. I do get good range of max 238 mile, which is good considering the hills close by.

I don't have another stick sadly. It is strange.

 

Jun 13 13:02:06 adsbx-custom rc.local[506]: Wed Jun 13 13:02:06 2018 Receiver status: connected
Jun 13 13:02:06 adsbx-custom rc.local[506]: Wed Jun 13 13:02:06 2018 Server status: ready
Jun 13 13:02:06 adsbx-custom rc.local[506]: Wed Jun 13 13:02:06 2018 Receiver: 474.6 msg/s received 128.7 msg/s processed (27%)
Jun 13 13:02:06 adsbx-custom rc.local[506]: Wed Jun 13 13:02:06 2018 Server: 0.0 kB/s from server 2.0kB/s TCP to server 0.0kB/s UDP to server
Jun 13 13:02:06 adsbx-custom rc.local[506]: Wed Jun 13 13:02:06 2018 Aircraft: 31 of 34 Mode S, 54 of 54 ADS-B used


Never get results

 

OK done, sending to you now.