Abstract: A laser radar system capable of measuring windspeed to within 1 m/s at distances in the range of 10 km. The system comprises two fast atomic line filter-detectors, a first filter-detector and a second filter-detector, in which a metal vapor is excited by signal light and further excited to a Rydberg level by a pump laser beam. An electric field is applied to the filters which ionizes the atoms. The filter-detectors operate at one of the resonance absorption peaks of the metal vapor. The second filter-detector is also subject to a magnetic field which splits the absorption peak of the vapor into two absorption peaks leaving a valley in the position of the original absorption peak. A preferred lasing frequency range is a frequency range covering a portion of one of the slopes of the peak of the first filter and a portion of one of the opposite direction slopes of one of the peaks of the second filter.