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Proceedings Paper

Acquisition and tracking performance measurements for a high-speed area array detector system
Author(s): Ralph C. Short; Michael A. Cosgrove; David L. Clark; Anthony J. Martino; Hongwoo Park; Bernard D. Seery
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Paper Abstract

A proof-of-concept (POC) demonstration system has been developed which demonstrates acquisition, tracking and point-ahead angle sensing for a space optical communications terminal utilizing a single high speed area array detector. The detector is the 128 x 128 pixel Kodak HS-40 photodiode array. It has 64 parallel readout channels and can operate at frames rates up to 40,000 frames/sec with rms readout noise of 20 photoelectrons. A windowing scheme and special purpose digital signal processing electronics are employed to implement acquisition and tracking algorithms. The system operates at greater than 1 kHz sample (frame) rates. Acquisition can be performed in as little as 30 milliseconds with less than 1 picowatt of 0.85 micron beacon power on the detector. At the same power level, the rms tracking accuracy is approximately 1/16 pixel. Results of system analysis and measurements using the POC system are presented.

Paper Details

Date Published: 1 June 1991
PDF: 11 pages
Proc. SPIE 1417, Free-Space Laser Communication Technologies III, (1 June 1991); doi: 10.1117/12.43748
Show Author Affiliations
Ralph C. Short, Eastman Kodak Co. (United States)
Michael A. Cosgrove, Eastman Kodak Co. (United States)
David L. Clark, Eastman Kodak Co. (United States)
Anthony J. Martino, NASA/Goddard Space Flight Ctr. (United States)
Hongwoo Park, NASA/Goddard Space Flight Ctr. (United States)
Bernard D. Seery, NASA/Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 1417:
Free-Space Laser Communication Technologies III
David L. Begley; Bernard D. Seery, Editor(s)

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