Physics
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4131..255h&link_type=abstract
Proc. SPIE Vol. 4131, p. 255-265, Infrared Spaceborne Remote Sensing VIII, Marija Strojnik; Bjorn F. Andresen; Eds.
Physics
Scientific paper
The Microwave Anisotropy Probe (MAP) Observatory, scheduled for a 2001 launch, is designed to measure temperature fluctuations (anisotropy) and produce a high sensitivity and high spatial resolution (< 0.3 degree(s) at 90 GHz) map of the cosmic microwave background radiation over the entire sky between 22 and 90 GHz. MAP utilizes back-to-back Gregorian telescopes to focus the microwave signals into 10 differential microwave receivers, via 20 feed horns. Proper alignment of the telescope reflectors and the feed horns at the operating temperature of 90 K is a critical element to ensure mission success. We describe the hardware and methods used to validate the displacement/deformation predictions of the reflectors and the microwave feed horns during thermal/vacuum testing of the reflectors and the microwave instrument. The smallest deformations to be resolved by the measurement system were on the order of +/- 0.030 inches (0.762 mm).
Aviado Carlos G.
Crane Allen J.
Herrera Acey A.
Hill Michael D.
Packard Edward A.
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