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@noaa-ngs

NOAA/NOS/National Geodetic Survey

NOAA’s National Geodetic Survey (NGS) provides the framework for all positioning activities in the Nation.

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  1. HTDP HTDP Public

    Horizontal Time-Dependent Positioning (HTDP) is a utility that allows users to transform positional coordinates across time and between spatial reference frames.

    Fortran 27 6

  2. ncat-lib ncat-lib Public

    Library of transformation modules used by the NCAT web based tool.

    Java 17 7

  3. inverse inverse Public

    The geodetic inverse, program INVERSE, is the tool for computing the geodetic azimuth and distance between two points, given their latitudes and longitudes.

    Fortran 4 3

  4. xintg xintg Public

    xintg (INTerpolate Experimental Geoid) is used to interpolate the geoid height for a user specified position and geoid model.

    C 2 1

  5. intg intg Public

    C 1 1

  6. intd intd Public

    Intd (INTerpolate from Deflection files)

    C 1

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