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Hybrid RF / Optical Communication Terminal with Spherical Primary Optics for Optical Reception

Show simple item record Charles, Jeffrey R. Hoppe, Daniel H. Sehic, Asim 2012-05-18T21:43:58Z 2012-05-18T21:43:58Z 2011-05-11
dc.identifier.citation 2011 IEEE International Conference on Space Optical Systems and Applications (ICSOS). Santa Monica, California, May 11, 2011 en_US
dc.identifier.clearanceno 11-1367
dc.description.abstract Future deep space communications are likely to employ not only the existing RF uplink and downlink, but also a high capacity optical downlink. The Jet Propulsion Laboratory (JPL) is currently investigating the benefits of a ground based hybrid RF and deep space optical terminal based on limited modification of existing 34 meter antenna designs. The ideal design would include as large an optical aperture as technically practical and cost effective, cause minimal impact to RF performance, and remain cost effective even when compared to a separate optical terminal of comparable size. Numerous trades and architectures have been considered, including shared RF and optical apertures having aspheric optics and means to separate RF and optical signals, plus, partitioned apertures in which various zones of the primary are dedicated to optical reception. A design based on the latter is emphasized in this paper, employing spherical primary optics and a new version of a “clamshell” corrector that is optimized to fit within the limited space between the antenna sub-reflector and the existing apex structure that supports the subreflector. The mechanical design of the hybrid accommodates multiple spherical primary mirror panels in the central 11 meters of the antenna, and integrates the clamshell corrector and optical receiver modules with antenna hardware using existing attach points to the maximum extent practical. When an optical collection area is implemented on a new antenna, it is possible to design the antenna structure to accommodate the additional weight of optical mirrors providing an equivalent aperture of several meters diameter. The focus of our near term effort is to use optics with the 34 meter DSS-13 antenna at Goldstone to demonstrate spatial optical acquisition and tracking capability using an optical system that is temporarily integrated into the antenna. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2011. en_US
dc.subject optical communications en_US
dc.subject hybrid radio frequencies en_US
dc.subject optical separation techniques en_US
dc.title Hybrid RF / Optical Communication Terminal with Spherical Primary Optics for Optical Reception en_US
dc.type Preprint en_US
dc.subject.NASATaxonomy Space Communications, Spacecraft Communications, Command and Tracking en_US

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