Abstract

Some of the optical problems connected with an artificial earth satellite are: visibility, the photographic determination of the precise orbit, and the temperature that the satellite will reach through radiation exchange. These matters are discussed with particular reference to the plans for the satellites to be launched by the United States during the International Geophysical Year. One of the first experiments to be flown will be the monitoring of the Lyman alpha line radiation of hydrogen emitted by the sun and the measurement of intensity variations associated with solar flares.

© 1957 Optical Society of America

Highlights of Twenty Years of Optical Space Research

Richard Tousey
Appl. Opt. 6(12) 2044-2070 (1967)

Some Problems in Low-Temperature Pyrometry

T. P. Gill
J. Opt. Soc. Am. 47(11) 1000-1005 (1957)

Study of Optical Diffraction Images at Microwave Frequencies*

M. P. Bachynski and G. Bekefi
J. Opt. Soc. Am. 47(5) 428-438 (1957)

Optical Diffractometer for Facilitation of X-Ray Diffraction Studies of Macromolecular Structures*

Harold W. Wyckoff, Richard S. Bear, Richard S. Morgan, and Diego Carlstrom
J. Opt. Soc. Am. 47(12) 1061-1069 (1957)

Performance of an Eight-Inch Babcock Grating in a Large Vacuum Spectrograph

A. Keith Pierce
J. Opt. Soc. Am. 47(1) 6-14 (1957)