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Earth-Image Tracking in the IR for Deep Space Optical CommunicationsSub-microradian level laser beam pointing to an Earth-based receiver is required for deep space optical communications. This requires a beacon emanated from Earth towards the spacecraft. The beacon could be a laser or reflected sunlight from Earth. Earth image tracking in the visible is hampered by significant albedo variations and/or crescent Earth image yielding large central errors. Here, we report results of Earth-image tracking in the infrared (8 to 13 micron) region of the spectrum with the aim of substantially alleviating the two challenges mentioned earlier.
Document ID
20080013190
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Hemmati, Hamid
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chen, Yinging
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lee, Shinhak
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ortiz, Gerard G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
July 25, 2005
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Distribution Limits
Public
Copyright
Other
Keywords
earth image tracking
optical communications

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