The <i>A</i>1-sequences and the <i>A</i>2-sequences have been proposed to replace the <i>M</i>-sequence that is generally used to modulate continuous-wave pseudorandom noise lidar. These new sequences, under two hypotheses, provide a reduction in the background noise, which is especially significant in noisy conditions when one uses <i>M</i>-sequences. We show that one of these two hypotheses is not verified for cloudy atmospheric conditions. Thus, the <i>A</i>1- and the <i>A</i>2-sequences cannot be used for such conditions.
© 1998 Optical Society of America
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.3640) Atmospheric and oceanic optics : Lidar
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(280.3640) Remote sensing and sensors : Lidar
Yves Emery and Cristina Flesia, "Use of the A1- and the A2-sequences to modulate continuous-wave pseudorandom noise lidar," Appl. Opt. 37, 2238-2241 (1998)