ASSESSING RUNWAY SURFACE CONDITIONS

Systems and methods for assessing runway conditions are disclosed. The system may comprise a brake control unit having an internal inertial sensor. The brake control unit may be configured to calculate a runway coefficient of friction to assess surface conditions of the runway. The brake control unit may monitor braking in an aircraft to detect a skid condition. In response to detecting the skid condition, the brake control unit may calculate an aircraft deceleration of the aircraft with the inertial sensor. The brake control unit may estimate the runway coefficient of friction based on the aircraft deceleration, an aerodynamic drag force of the aircraft, and a thrust reverse force of the aircraft.