Comparison of lidar water vapor measurements using Raman scatter at 266 nm and 532 nm

Raman lidar measurements at different wavelengths have become a well-established technique to obtain water vapor profiles. Measurements of the atmospheric distributions of water vapor have been made with the LAMP lidar (Laser Atmospheric Measurement Program) during the 1995 Case I measurement program on Wallops Island, VA. The simultaneous measurements obtained from the vibrational Raman technique at night using the visible signal ratio of 660/607 nm and the ultraviolet signal ratio of 295/285 nm were compared in order to validate the Raman technique for the UV channel. Correlations of the water vapor between the visible and UV channel were made, producing an overall average correlation of 0.94. Data sets with detailed vertical night time profiles from the surface to 4 km are presented. In addition, daytime vertical profiles from the surface to about 1 km are also shown.