[OUTDATED] piAware 3.5.3 image - WORKING MLAT REQUIRES MANUAL UPDATE

ATTENTION!

/home/pi/adsb-exchange/

adsbexchange-mlat_maint.sh

MLAT will no longer work due to Google shutting off altitude from latitude and longitude.

You will need to update your altitude in that above file manually.

 

Hi Dan,

Is this the one:-

ALTITUDE=$(curl -s https://maps.googleapis.com/maps/ap...&'KEY=AIzaSyCd_veijCtNdVj2f4bWAVTB_lS9Wv3hvZ0 | python -c "import json,sys;obj=json.load(sys.stdin);print obj['results'][0]['elevation'];")

Changed to:-

ALTITUDE=100

Thanks and I'm looking forward to hearing from you soon.

Regards.

 

Yes, that's the line I changed a couple of days ago on my pi and it's all working again now

 

Thanks for the info.

 

Yes, just change it to whatever your altitude is in meters.

 

Thanks James for the confirmation.

Regard.

 

@James meters or feet?? - page 1 says feet - that's what I've done

 

Doesn't matter, in the grand scheme .... RF moves at slightly less than 300,000 km per second or 983,571,056.43 feet per second or 186,282.397 miles per second.

The different between 1000 feet and 1000 meters ... is withing the margin of error of calculating MLAT ...

It's more important that clocks are synced to NTP.

1 microsecond off, 0.000001 of a second, is 0.3 km of error.
1 millisecond off, 0.001, is 300km.


That being said ..

# Feet
alt=200

# Meters
alt=400m

 

Ok James. One of the problems feeding various sites and the way the sites calculate the positions of mlat aircraft. 360Radar want the height entered very accurately and get upset if you forget to add the height of the antenna onto the height of the ground above sea level (ie 20 or 30 feet error). That's why I thought feet and meters might of made a big difference - not to worry

 

[REDACTED]

Let's not advertise these turds.

 

Well I tracked them down, was banned in 10 minutes and magically the global data feed they were stealing disappeared.

All they had to do was ask, instead the Ben guy called me a troll and told me to 'prove' it, then banned me. Christ lol