Alignment measurements of the Microwave Anisotropy Probe (MAP) instrument in a thermal/vacuum chamber using photogrammetry

Michael D. Hill; Acey A. Herrera; J. Allen Crane; Edward A. Packard; Carlos G. Aviado; Henry P. Sampler

doi:10.1117/12.406549

16 November 2000 Alignment measurements of the Microwave Anisotropy Probe (MAP) instrument in a thermal/vacuum chamber using photogrammetry

Michael D. Hill, Acey A. Herrera, J. Allen Crane, Edward A. Packard, Carlos G. Aviado, Henry P. Sampler

Author Affiliations +

Proceedings Volume 4131, Infrared Spaceborne Remote Sensing VIII; (2000) https://doi.org/10.1117/12.406549
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

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).

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Michael D. Hill, Acey A. Herrera, J. Allen Crane, Edward A. Packard, Carlos G. Aviado, and Henry P. Sampler "Alignment measurements of the Microwave Anisotropy Probe (MAP) instrument in a thermal/vacuum chamber using photogrammetry", Proc. SPIE 4131, Infrared Spaceborne Remote Sensing VIII, (16 November 2000); https://doi.org/10.1117/12.406549

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