Abstract

Daylight single probe and differential probe ${\text{C}}_{\text{T}}^2$ rawinsonde data are a factor of 10 to 100 larger than nocturnal launch data at heights of 10-15 km. Recent joint optical and balloon measurements reveal no optical counterpart coincident with the thermal probe results. It appears that the factor of 10 enhancement in daylight atmospheric profiles of ${\text{C}}_{\text{n}}^2$ is an artifact of solar heating on the measurement system. Experimental results of direct solar heating of the probe and balloon wake effects are presented along with the optical data.

© 1990 Optical Society of America