Proceedings ArticleDOI
A Beacon Tracker And Point Ahead System For Optical Communications
David Greenwald,Chris McLaughlin +1 more
- Vol. 1111, pp 268-276
TLDR
In this paper, the authors describe the design and fabrication of a self contained satellite beacon tracking system for optical communications, which uses high bandwidth steering mirrors to effectively cancel atmospheric turbulence and mount jitter.Abstract:
This paper describes the design and fabrication of a self contained satellite beacon tracking system for optical communications. This device is installed on a tracking mount and uses high bandwidth steering mirrors to effectively cancel atmospheric turbulence and mount jitter. The steering mirrors are integrated with a 20-cm, unobscured telescope used for receiving the beacon and for transmitting a modulated communications uplink. Satellite range and velocity calculated for its ephemeris are used to offset the transmitted beam from the beacon by as much as 50 microradians to compensate for optical transit time.read more
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Patent
System for active co-boresight measurement in a laser communication system
TL;DR: In this paper, a system for active co-boresight measurement includes a detector, first and second steering mirrors, and a controller, and the controller controls a position of the first steering mirror to align the detected portion of the received beam with the alignment position on the detector.
Journal ArticleDOI
Point ahead angle prediction based on Kalman filtering of optical axis pointing angle in satellite laser communication
TL;DR: A new PAA prediction method based on Kalman filtering of the optical axis pointing trajectory is proposed based on the high precision of fine tracking to improve the accuracy of predictive filtering.
Journal ArticleDOI
Point-ahead analysis and pre-pointing link stability study of intersatellite laser communication
TL;DR: This study presents a further analytical investigation into the point-ahead angle in complex satellite maneuvering environment and shows that the 2nd order point- Ahead angle has a significant detrimental impact on link stability in long distance links.
Proceedings ArticleDOI
Fine pointing and tracking concepts for optical intersatellite links
Eric D. Miller,Kevin Michael Birnbaum,Chien-Chung Chen,Andrew T. Grier,Matt Hunwardsen,Dominic Jandrain +5 more
TL;DR: Two fine pointing architectures are presented that support high-accuracy pointing, while also featuring simplification of the small-space optical assembly hardware, reduction in the number and complexity of constituent components, full self-calibration capability, and relaxation of otherwise-strict, cost-driving subassembly requirements.
Proceedings ArticleDOI
Beam-tracker and point-ahead system for optical communications II: servo performance
Paul V. LaSala,Chris McLaughlin +1 more
TL;DR: In this paper, the beacon tracker and point ahead single system described previously has been installed and integrated with the optical tracking system and the analysis and results of bench and system integration tests are provided, including servo jitter as a function of illumination level and tracking ability.