Method and device for communicating true runway braking performance using data from the flight data management systems of landed aircraft

A computer network for calculating and distributing a true aircraft braking friction coefficient of an aircraft runway or aircraft taxiway, comprising:

• (A) A computer for obtaining aircraft property data directly or indirectly from an aircraft, wherein the aircraft property data comprises data pertaining to one or more of the following aircraft properties measured at various times for the aircraft:
• aircraft ground speed, aircraft brake pressure, aircraft longitudinal acceleration, aircraft engine thrust setting, aircraft reverse thrust setting, aircraft engine revolutions per minute, aircraft air speed, aircraft vertical acceleration, aircraft spoiler setting, aircraft airbrake setting, aircraft aileron setting, aircraft flap configuration, aircraft pitch, and aircraft autobrake setting;
• and
• (B) Wherein the computer calculates the true aircraft braking friction coefficient of the aircraft runway or aircraft taxiway using at least some of the aircraft property data obtained by the computer.