Present combat systems are being upgraded to properly meet the new capabilities being developed against tactical ballistic missiles. The local coordinate systems are being upgraded to a global (WGS-84) coordinate system so that the correct exchange of threat information with other defending units can be done correctly and in a timely manner. This coordinate system upgrade is also used to properly track these threats, The computation of an Earth-centered coordinate (X/sub ECC/, Y/sub ECC/, Z/sub ECC/) system for a track referenced by altitude, latitude, and longitude is straightforward in biaxial (WGS-84) ellipsoid Earth. The problem arises using the Earth-centered coordinate system for the inverse operation to recompute the altitude, latitude and longitude of the track. This computation can only be done approximately. This article introduces a unique analytic derivation to calculate exactly the latitude, longitude, and altitude of a track from an Earth centered coordinate system. The problem is transformed into solving for a root of an eighth-order polynomial, which can then be reduced and solved by rewriting as a quartic equation. A robust, iterative numerical algorithm for computer implementation is also presented for platforms having computational and memory constraint. An example is given and comparisons made to show the application of these techniques.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    An exact conversion from an Earth-centered coordinate system to latitude, longitude and altitude


    Contributors:


    Publication date :

    1997-01-01


    Size :

    297618 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    An Exact Conversion from an Earth-Centered Coordinate System to Latitude, Longitude and Altitude

    Sudano, J. / IEEE | British Library Conference Proceedings | 1997



    Automatic latitude/longitude sensing technique for earth satellites

    Freeman, D.J. | Engineering Index Backfile | 1962



    Latitude and longitude and traffic management road information conversion method

    HUANG SHUBING / YOU YONG / SHIZUKO et al. | European Patent Office | 2024

    Free access