Scripps Institution of Oceanography

SIO Reference 60-32. The Visibility Laboratory of the University of California, La Jolla Campus, is engaged in an on-going research program concerning optical image transmission through the atmosphere. In connection with thi3 work several data gathering flights were made in western Florida in the vicinity of Eglin Air Force Base in the spring of 1957. Flight 112, during which data in this report were measured, was one of these flights. Part I of this report, SIO Reforence 60-22, of April I960, presented data as a c atalogue of recorded optical measurements less sky luminance and sky radiance distributions. This part of the report, Part II, presents the sky luminance distribution as it varied with altitude, zenith angle, and azimuth with respect to the sun. Sky radiance distribution will be presented at a later date as Part III of this report.