T. Fukuchi et al., Evaluation of differential absorption lidar (DIAL) measurement error by simultaneous DIAL and null profiling, OPT ENG, 40(3), 2001, pp. 392-397
A differential absorption lidar system for measurement of trace atmospheric
substances in the visible and UV regions is developed. The system is based
on a pair of Nd:YAG pumped dye lasers, each capable of emitting two wavele
ngths on alternate shots. The measurement error of the system was evaluated
by measurement of tropospheric O-3 using two identical differential absorp
tion lidar (DIAL) pairs, from which two null profiles and four DIAL profile
s are obtained simultaneously. The null profiles, obtained for both the on
and off wavelengths used in DIAL measurement, are useful to evaluate system
atic DIAL measurement error due to beam misalignment. The null profiles sho
w that this systematic error is at most 1.3%. The total DIAL measurement er
ror is about 5%, most of which can be attributed to statistical error. (C)
2001 Society of Photo-Optical Instrumentation Engineers.