The program was initiated to investigate the availability of critical large deployable antenna technologies which would enable microwave remote sensing missions from geostationary orbits as required for Mission to Planet Earth. Program goals for the large antenna were: 40-meter diameter, offset-fed paraboloid, and surface precision of 0.1 mm rms. Phase 1 goals were: to review the state-of-the-art for large, precise, wide-scanning radiometers up to 60 GHz; to assess critical technologies necessary for selected concepts; to develop mission architecture for these concepts; and to evaluate generic technologies to support the large deployable reflectors necessary for these missions. Selected results of the study show that deployable reflectors using furlable segments are limited by surface precision goals to 12 meters in diameter, current launch vehicles can place in geostationary only a 20-meter class antenna, and conceptual designs using stiff reflectors are possible with areal densities of 2.4 deg/sq m.
Large Deployable Antenna Program. Phase 1: Technology Assessment and Mission Architecture
1991
86 pages
Report
Keine Angabe
Englisch
Astronautics , Antennas , Antenna design , Large space structures , Microwave antennas , Reflector antennas , Geosynchronous orbits , Remote sensing , Technology assessment , Folding structures , Large deployable reflector , Launch vehicles , Microwave imagery , Mission planning , Parabolic bodies , Radiometers , Remote sensors
Systems Exploiting Large Deployable Antenna Technology
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