Abstract

Rayleigh scattering from atmospheric gases in the path of an intense search-light beam has been measured up to heights of 34 km. It is found that above a limit of haze, which varies on different days from four to ten km, the scattering agrees with that calculated upon the assumption of the usual atmosphere. Clouds have been occasionally observed at heights of 12 km. It is shown that the method can be extended to allow measurements up to heights of 70 to 90 km and to determine the distribution of ozone at low altitudes, as well as the study of other atmospheric problems.

© 1939 Optical Society of America

On the Theory of the Ceiling Projector*

W. E. Knowles Middleton
J. Opt. Soc. Am. 29(8) 340-349 (1939)

Observations of a Searchlight Beam to an Altitude of 28 Kilometers

E. O. Hulburt
J. Opt. Soc. Am. 27(11) 377-382 (1937)

The Limiting Sensitivity of the Alternating-Current Method of Photo-Cell-Current Amplification

E. A. Johnson, W. H. Mock, and R. E. Hopkins
J. Opt. Soc. Am. 29(12) 506-511 (1939)

Measurements on Direct and Indirect Adaptation by Means of a Binocular Method

J. F. Schouten and L. S. Ornstein
J. Opt. Soc. Am. 29(4) 168-182 (1939)

Methods and Instruments for the Determination of Photographic Speeds by Measurement of Relative Characteristic Gradients*

Clifton Tuttle
J. Opt. Soc. Am. 29(7) 267-277 (1939)