Package org.orekit.propagation.analytical.gnss

Class ClockCorrectionsProvider

  • All Implemented Interfaces:
    AdditionalDataProvider<double[]>
    public class ClockCorrectionsProvider
extends Object
implements AdditionalDataProvider<double[]>
    Provider for clock corrections as additional states.

    The value of this additional state is a three elements array containing

    • at index 0, the polynomial satellite clock model Δtₛₐₜ = a₀ + a₁ (t - toc) + a₂ (t - toc)²
    • at index 1 the relativistic clock correction due to eccentricity
    • at index 2 the estimated group delay differential TGD for L1-L2 correction

    Since Orekit 10.3 the relativistic clock correction can be used as an EstimationModifier in orbit determination applications to take into consideration this effect in measurement modeling.

    Since:
    9.3
    Author:
    Luc Maisonobe

    • Field Detail

      • CLOCK_CORRECTIONS

        public static final String CLOCK_CORRECTIONS
        Name of the additional state for satellite clock corrections.
        Since:
        9.3
        See Also:
        Constant Field Values

    • Constructor Detail

      • ClockCorrectionsProvider

        public ClockCorrectionsProvider​(GNSSClockElements gnssClk,
                                double cycleDuration)
        Simple constructor.
        Parameters:
        gnssClk - GNSS clock elements
        cycleDuration - duration of the GNSS cycle in seconds

    • Method Detail

      • getName

        public String getName()
        Get the name of the additional data.

        If a provider just modifies one of the basic elements (orbit, attitude or mass) without adding any new data, it should return the empty string as its name.

        Specified by:
        getName in interface AdditionalDataProvider<double[]>
        Returns:
        name of the additional data (names containing "orekit" with any case are reserved for the library internal use)

      • getAdditionalData

        public double[] getAdditionalData​(SpacecraftState state)
        Get the additional data.
        Specified by:
        getAdditionalData in interface AdditionalDataProvider<double[]>
        Parameters:
        state - spacecraft state to which additional data should correspond
        Returns:
        additional state corresponding to spacecraft state