you could go to the FA adsb stats page and then look at ADS-D and then statistics. you can go down the columns and see the sites that have both 1090 and 978 and look at the ratios.
you could go to the FA adsb stats page and then look at ADS-D and then statistics. you can go down the columns and see the sites that have both 1090 and 978 and look at the ratios.