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Proceedings Paper

Holographic weapons sight as a crew optical alignment sight
Author(s): Nujoud Merancy; Brian Dehmlow; Jack P. Brazzel
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Paper Abstract

Crew Optical Alignment Sights (COAS) are used by spacecraft pilots to provide a visual reference to a target spacecraft for lateral relative position during rendezvous and docking operations. NASA's Orion vehicle, which is currently under development, has not included a COAS in favor of automated sensors, but the crew office has requested such a device be added for situational awareness and contingency support. The current Space Shuttle COAS was adopted from Apollo heritage, weighs several pounds, and is no longer available for procurement which would make re-use difficult. In response, a study was conducted to examine the possibility of converting a commercially available weapons sight to a COAS for the Orion spacecraft. The device used in this study was the XPS series Holographic Weapon Sight (HWS) procured from L-3 EOTech. This device was selected because the targeting reticule can subtend several degrees, and display a graphic pattern tailored to rendezvous and docking operations. Evaluations of the COAS were performed in both the Orion low-fidelity mockup and rendezvous simulations in the Reconfigurable Operational Cockpit (ROC) by crewmembers, rendezvous engineering experts, and flight controllers at Johnson Space Center. These evaluations determined that this unit's size and mounting options can support proper operation and that the reticule visual qualities are as good as or better than the current Space Shuttle COAS. The results positively indicate that the device could be used as a functional COAS and supports a low-cost technology conversion solution.

Paper Details

Date Published: 23 May 2011
PDF: 12 pages
Proc. SPIE 8044, Sensors and Systems for Space Applications IV, 80440R (23 May 2011); doi: 10.1117/12.883900
Show Author Affiliations
Nujoud Merancy, Booz Allen Hamilton Inc. (United States)
Brian Dehmlow, L-3 Communications EOTech (United States)
Jack P. Brazzel, NASA Johnson Space Ctr. (United States)


Published in SPIE Proceedings Vol. 8044:
Sensors and Systems for Space Applications IV
Khanh D. Pham; Henry Zmuda; Joseph Lee Cox; Greg J. Meyer, Editor(s)

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