Photogrammetrically measured distortions of a composite microwave reflector system in vacuum at ~90 K

Peter D. Mule; Michael D. Hill; Henry P. Sampler

doi:10.1117/12.406550

16 November 2000 Photogrammetrically measured distortions of a composite microwave reflector system in vacuum at ~90 K

Peter D. Mule, Michael D. Hill, Henry P. Sampler

Proceedings Volume 4131, Infrared Spaceborne Remote Sensing VIII; (2000) https://doi.org/10.1117/12.406550
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 methods and analysis used to validate the in-flight position and shape predictions for the reflectors based on photogrammetric metrology data taken under vacuum with the reflectors at approximately 90 K. Contour maps showing reflector distortions were generated. The resulting reflector distortion data are shown to be crucial to the analytical assessment of the MAP instrument's microwave system in- flight performance.

Citation Download Citation

Peter D. Mule, Michael D. Hill, and Henry P. Sampler "Photogrammetrically measured distortions of a composite microwave reflector system in vacuum at ~90 K", Proc. SPIE 4131, Infrared Spaceborne Remote Sensing VIII, (16 November 2000); https://doi.org/10.1117/12.406550

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available