Accession Number : AD0623513

Title :   STUDY OF ACTIVE PROBING OF WATER VAPOR PROFILES AND RESULTS OF EXPERIMENTS.

Descriptive Note : Final rept. pt. 1 on Optical Sounding II for 6 Nov 63-15 Jul 65,

Corporate Author : NEW YORK UNIV N Y GEOPHYSICAL SCIENCES LAB

Personal Author(s) : Schotland,R. M. ; Chang,D. ; Bradley,J.

Report Date : 15 JUL 1965

Pagination or Media Count : 95

Abstract : A ruby laser system has been assembled which includes provision for thermally tuning the laser operating wavelength. Experiments have been carried out which were designed to test the potential of such a radar for the remote determination of the vertical profile of water vapor by means of a spectral study of the back scattered energy. The results of the experiments indicate that such measurements are feasible. However, detailed information must be obtained on the water vapor absorption line structure. A theoretical study has been undertaken of the contribution of secondary molecular scattering to the return observed by a laser optical radar. The results are presented as a function of the beam width of the receiver optics and the wavelength of the laser. It is shown that the contribution of secondary scatter to the observed energy can be made negligibly small by suitably restricting the beam width of the receiver optics. (Author)

Descriptors :   (*LASERS, ATMOSPHERIC SOUNDING), (*ATMOSPHERIC SOUNDING, LASERS), (*WATER VAPOR, ATMOSPHERES), RUBY, OPTICAL INSTRUMENTS, RADAR, LIGHT TRANSMISSION, REFLECTION, AEROSOLS, SPECTROSCOPY

Distribution Statement : APPROVED FOR PUBLIC RELEASE