Patent ID: 8902106

Claim:
A system for measuring a radial speed of a moving body in a line of sight determined with respect to a referential position, the system comprising: an emitter assembly configured to emit a signal and a referential receiver assembly configured to receive said signal, the emitter assembly being disposed on first elements of a group formed by the moving body and the referential position, the receiver assembly being disposed on second elements of the group, the emitter assembly configured to emit the signal on at least two emission frequencies, said emission frequencies being separated by a chosen emission frequency gap, and an analyzer configured to analyze the signal received by the receiver assembly, said analyzer configured to receive signal reception frequencies, a reception frequency being a function of an emission frequency altered by the Doppler effect related to displacement of the moving body, and to measure a reception frequency gap separating said signal reception frequencies to calculate the radial speed of the moving body according to a function of said reception frequency gap and of the emission frequency gap.