GalileoOrbitalElements.java

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package org.orekit.propagation.analytical.gnss;

/** This interface provides the minimal set of orbital elements needed by the {@link GalileoPropagator}.
 *
 * @see <a href="https://www.gsc-europa.eu/system/files/galileo_documents/Galileo-OS-SIS-ICD.pdf">
 *         Galileo Interface Control Document</a>
 *
 * @author Bryan Cazabonne
 * @since 10.0
 *
 */
public interface GalileoOrbitalElements extends GNSSOrbitalElements {

    // Constants
    /** Earth's universal gravitational parameter for Galileo user in m³/s². */
    double GALILEO_MU = 3.986004418e+14;

    /** Value of Pi for conversion from semicircles to radian. */
    double GALILEO_PI = 3.1415926535898;

    /** Duration of the Galileo week in seconds. */
    double GALILEO_WEEK_IN_SECONDS = 604800.;

    /** Number of weeks in the Galileo cycle. */
    int GALILEO_WEEK_NB = 4096;

    /**
     * Gets the Issue Of Data (IOD).
     *
     * @return the Issue Of Data (IOD)
     */
    default int getIODNav() {
        return 0;
    }

    /**
     * Gets the estimated broadcast group delay differential.
     *
     * @return the estimated broadcast group delay differential(s)
     */
    default double getBGD() {
        return 0.0;
    }

    /**
     * Gets the E1/E5a broadcast group delay.
     *
     * @return the E1/E5a broadcast group delay (s)
     */
    default double getBGDE1E5a() {
        return 0.0;
    }

    /**
     * Gets the Broadcast Group Delay E5b/E1.
     *
     * @return the Broadcast Group Delay E5b/E1 (s)
     */
    default double getBGDE5bE1() {
        return 0.0;
    }

}