Sub-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.


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    Titel :

    Earth-Image Tracking in the IR for Deep Space Optical Communications


    Beteiligte:
    Hemmati, Hamid (Autor:in) / Chen, Yinging (Autor:in) / Lee, Shinhak (Autor:in) / Ortiz, Gerard G. (Autor:in)

    Erscheinungsdatum :

    2005-07-25


    Medientyp :

    Preprint


    Format :

    Keine Angabe


    Sprache :

    Englisch