Hi everyone,
Congratulation @richardalligier, it was impressive to see how quickly you managed to get a score below 40m and I think it is a well desserved victory. Congrats to ck.ua team as well, it was a quite intense finish and I almost feel sorry to take the second spot by fiddling with some parameters 50 minutes before the end of the round 
. And finally felicitations to Sergei which was very close to the podium with a very good score.
I was familiar with ADS-B data but not with localization algorithms and this challenge was a very good way to get a foothold in it. Thanks OpenSky Network and CYD Campus for organizing and I am looking forward to seeing what solutions other competitors came up with and maybe meeting you in person during the OpenSKy Symposium.
Concerning the general feedback, I agree that having a hidden test set and a limited number of daily submissions would help.
Thanks,
Benoit