Satellite navigation, a process of identifying the space and time coordinates of the satellite data products (for example image), is introduced. An explanation of why satellite navigation without ground control points is tied to satellite orbit determination and prediction (ephemerides) is given. Software for the direct and inverse referencing (ORBITS, PIXPO) was studied and improved, or replaced by another software (ORBITEST, PIXPO 3 and 4). The validation tests performed showed that the accuracy achieved in determination of the time of culmination (or pixel line) and in the off nadir angle (or pixel number) is comparable to the present pixel size for the NOAA-N satellites, that is 1 to 5 km, provided that the orbital elements (NASA two line elements) are not older than about two weeks. The main obstacle for a further significant improvement is the low quality of the orbital elements.


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    Title :

    Navigation of Polar Orbiting Meteorological Satellites


    Contributors:
    J. Klokocnik (author) / P. Schluessel (author) / J. Kostelecky (author) / H. Grassl (author)

    Publication date :

    1991


    Size :

    88 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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