Abstract: The present invention relates to a speed measurement system allowing the relative speed V of a moving body in relation to an ambient air mass to be measured independently of the atmospheric conditions, the moving body being designed to move at least at subsonic and transonic speeds.

Abstract: Device and method for anticipating the deposition of ice on a runway, comprising an object having a non-zero relative velocity with respect to the atmosphere surrounding the runway, this surrounding atmosphere being at a certain temperature, a means for determining the thickness of ice present on said moving object, which further includes a temperature sensor for measuring the temperature of the runway, a means for regulating the temperature of said object in such a way that the temperature of said moving object is substantially equal to or slightly below the temperature of the runway, a computing means, for defining at time t0 a level of icing at time t1 of the runway as a function of the thickness of ice present on the object, and a warning means allowing the results obtained by the computing means to be communicated to a monitoring station.