Articles

Multiple Fabry-Pe´rot interferometers in an incoherent Doppler lidar

[+] Author Affiliations
Matthew J. McGill, Wilbert R. Skinner

University of Michigan Department of Atmospheric and Space Sciences Space Physics Research Laboratory Ann Arbor, Michigan 48109 mcgill@virl.gsfc.nasa.gov

Opt. Eng. 36(1), 139-145 (Jan 01, 1997). doi:10.1117/1.601153
History: Received April 1, 1996; Revised July 19, 1996; Accepted July 23, 1996
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Abstract

A high-resolution incoherent-detection Doppler lidar has been constructed at the University of Michigan Space Physics Research Laboratory. The lidar uses multiple Fabry-Pe´rot interferometers to measure the Doppler shift of aerosol-backscattered light and to attenuate background light. In this way, vertical profiles of the horizontal wind field are obtained with high spatial and temporal resolution. It has been found that if the transmission functions of the etalons are not properly aligned, a systematic error in the Doppler-shift determination can result. This error is dependent on the relative aerosol loading of the atmosphere and can be quite large. For large etalon offsets the wind error can be in excess of 10 m/s. Even for small offsets and high aerosol loadings, the wind determination can be biased by as much as 1 m/s. A previously developed model and inversion process can be modified to allow for an offset between the etalons and recover data without bias. © 1997 Society of Photo-Optical Instrumentation Engineers.

Key words: lidar; incoherent Doppler lidar; Fabry-Pe´rot interferometer; Doppler shift; wind measurements; aerosol backscatter.

© 1997 Society of Photo-Optical Instrumentation Engineers

Citation

Matthew J. McGill and Wilbert R. Skinner
"Multiple Fabry-Pe´rot interferometers in an incoherent Doppler lidar", Opt. Eng. 36(1), 139-145 (Jan 01, 1997). ; http://dx.doi.org/10.1117/1.601153


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