Accession Number:

AD0257170

Title:

RESEARCH ON THE DETECTION OF INFRARED EMISSION FROM SATELLITE VEHICLES

Descriptive Note:

Corporate Author:

ITT FEDERAL LABS SAN FERNANDO CALIF

Personal Author(s):

Report Date:

1960-12-01

Pagination or Media Count:

1.0

Abstract:

A 20 inch aperture infrared radiometer designed to detect infrared emission from satellite vehicles is described. The radiometer may be equipped with either cooled lead sulfide or cooled indium antimonide detectors. Radiation modulation is accomplished by space filter type chopper discs enabling angular resolution of 1167 waves per radian to aid in background suppression. A nodding Newtonian folding mirror provides for scanning the 14 x 14 degree instantaneous field over or - 2.5 degrees in the search-acquisition mode of operation. A memory oscilloscope is used to correlate low level signals by their ordered appearance in repeated line scans. Infrared irradiance measurements from orbiting satellites are presented. It is shown that other satellites must have been significantly cooler than 500 degree Kelvin to escape detection due to their passive radiation only. Techniques are described for predicting satellite orbits and optimizing search scan procedures. Infrared background measurements for daytime, twilight, and night sky conditions are presented. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE