When dealing with such small tolerances between aircraft, it is important to keep in mind the limitations of ADS-B data. ADS-B data is reported in 25 foot increments, so a reported value of 50 feet is 50 feet ± 25 feet. The following values should then be taken with those qualifications in mind.

The altitude reported by the Nouvelair flight as it passed over the easyJet A320 was 50 feet. Both the Nouvelair and easyJet flights were operated by Airbus A320-214s. The A320 has a tail height of 38 feet, 7 inches.