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Proceedings Paper

Performance testing of an active boresight mechanism for use in the CALIPSO space bourne LIDAR mission
Author(s): Chris Seckar; Larry Guy; Angela DiFronzo; Carl Weimer
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Paper Abstract

The CALIPSO LIDAR utilizes a receiver telescope with a narrow Field-of-View (FOV) to reject background light and meet SNR requirements - FOV ≈ 130 μrad. To maximize SNR the laser is collimated (divergence ≈100 μrad) and must be aligned to the receiver telescope FOV to within +/- 12 μrad (allocated). To make accurate LIDAR measurements the receiver/laser alignment must not vary by more than +/- 10 μrad (allocated) over an orbit. To make accurate depolarization measurements of clouds, the polarization axis of the laser must be aligned to within +/- 0.5 degrees (allocated) relative to the aft optical bench polarization axis and maintain alignment throughout the motion of the boresight adjustment range. The Active Boresight Mechanism provides a means of re-aligning the laser to the telescope on-orbit. A comprehensive performance testing campaign demonstrated that the Active Boresight Mechanism met or exceeded requirements. On-orbit performance results are imminent, as CALIPSO is scheduled for launch this Fall.

Paper Details

Date Published: 30 August 2005
PDF: 12 pages
Proc. SPIE 5877, Optomechanics 2005, 58770X (30 August 2005); doi: 10.1117/12.614516
Show Author Affiliations
Chris Seckar, Ball Aerospace & Technologies Corp. (United States)
Larry Guy, Ball Aerospace & Technologies Corp. (United States)
Angela DiFronzo, Ball Aerospace & Technologies Corp. (United States)
Carl Weimer, Ball Aerospace & Technologies Corp. (United States)


Published in SPIE Proceedings Vol. 5877:
Optomechanics 2005
Alson E. Hatheway, Editor(s)

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