Class ICGEMFormatReader

  • All Implemented Interfaces:
    DataLoader

    public class ICGEMFormatReader
    extends PotentialCoefficientsReader
    Reader for the ICGEM gravity field format.

    This format is used to describe the gravity field of EIGEN models published by the GFZ Potsdam since 2004. It is described in Franz Barthelmes and Christoph Förste paper: "the ICGEM-format". The 2006-02-28 version of this paper can be found here and the 2011-06-07 version of this paper can be found here. These versions differ in time-dependent coefficients, which are linear-only prior to 2011 (up to eigen-5 model) and have also harmonic effects after that date (starting with eigen-6 model). A third (undocumented as of 2018-05-14) version of the file format also adds a time-span for time-dependent coefficients, allowing for piecewise models. All three versions are supported by the class.

    This reader uses relaxed check on the gravity constant key so any key ending in gravity_constant is accepted and not only earth_gravity_constant as specified in the previous documents. This allows to read also non Earth gravity fields as found in ICGEM - Gravity Field Models of other Celestial Bodies page to be read.

    The proper way to use this class is to call the GravityFieldFactory which will determine which reader to use with the selected gravity field file.

    Author:
    Luc Maisonobe
    See Also:
    GravityFields
    • Constructor Detail

      • ICGEMFormatReader

        public ICGEMFormatReader​(String supportedNames,
                                 boolean missingCoefficientsAllowed,
                                 TimeScale timeScale)
        Simple constructor.
        Parameters:
        supportedNames - regular expression for supported files names
        missingCoefficientsAllowed - if true, allows missing coefficients in the input data
        timeScale - to use when parsing dates.
        Since:
        10.1