A feasibility study for simultaneous range resolved measurements of minor species concentration by the differential absorption lidar (DIAL) technique and wind velocity using a pulsed carbon-dioxide HCLR is addressed. The LMD heterodyne coherent laser radar (HCLR) is used to investigate the statistical properties of the distributed aerosols backscattered power and Doppler frequency shift estimation as a function of range gate. We derive a trade off between accuracy for wind velocity and species concentration. We determine an optimal pulse bandwidth accounting for pulse duration and frequency chirp to fulfill the requirements on measurement accuracies, range resolution and time resolution. We show that for accurate concentration estimations, an accumulation on a few tens shots is required. We introduce a detector array in order to improve the performances with respect to statistical distribution.

Date Published: 26 May 1997
PDF: 11 pages
Proc. SPIE 3104, Lidar Atmospheric Monitoring, (26 May 1997); doi: 10.1117/12.275135

Published in SPIE Proceedings Vol. 3104:
Lidar Atmospheric Monitoring
Jean-Pierre Wolf, Editor(s)