Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976osu..reptq....l&link_type=abstract
Final Report, 16 May 1974 - 30 Sep. 1975 Ohio State Univ., Columbus. ElectroScience Lab.
Astronomy and Astrophysics
Astronomy
Antenna Arrays, Millimeter Waves, Space Shuttles, Steerable Antennas, Atmospheric Turbulence, Intermediate Frequencies, Radio Astronomy, Technology Utilization
Scientific paper
The potential uses and techniques for the shuttle spacelab Millimeter Wave Large Aperture Antenna Experiment (MWLAE) are documented. Potential uses are identified: applications to radio astronomy, the sensing of atmospheric turbulence by its effect on water vapor line emissions, and the monitoring of oil spills by multifrequency radiometry. IF combining is preferable to RF combining with respect to signal to noise ratio for communications receiving antennas of the size proposed for MWLAE. A design approach using arrays of subapertures is proposed to reduce the number of phase shifters and mixers for uses which require a filled aperture. Correlation radiometry and a scheme utilizing synchronous Dicke switches and IF combining are proposed as potential solutions.
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