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linkIntervals

Intervals during which link is closed

    Description

    example

    interval = linkIntervals(lnk) returns a table of intervals during which the link between the first node and last node in each link object input vector is closed.

    Examples

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    Create a satellite scenario object.

    startTime = datetime(2020,10,13,7,25,0);
    stopTime = startTime + days(1);
    sampleTime = 60;                                       % seconds
    sc = satelliteScenario(startTime,stopTime,sampleTime);

    Add a satellite to the scenario.

    semiMajorAxis = 10000000;                               % meters
    eccentricity = 0;
    inclination = 10;                                       % degrees
    rightAscensionOfAscendingNode = 0;                      % degrees
    argumentOfPeriapsis = 0;                                % degrees
    trueAnomaly = 210;                                      % degrees
    sat = satellite(sc,semiMajorAxis,eccentricity, ...
        inclination,rightAscensionOfAscendingNode, ...
        argumentOfPeriapsis,trueAnomaly);

    Add a transmitter to the satellite.

    tx = transmitter(sat);

    Add a ground station to the scenario.

    latitude = 0;                             % degrees
    longitude = 30;                           % degrees
    gs = groundStation(sc,latitude,longitude);

    Add a receiver to the ground station.

    rx = receiver(gs,"MountingAngles",[0; 180; 0]);

    Create a downlink.

    lnk = link(tx,rx);

    Obtain the intervals table of the closed downlink.

    intervals = linkIntervals(lnk)
    intervals =
    
      0x8 empty table
    

    Input Arguments

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    Link analysis object, specified as a Link object vector or scalar.

    Output Arguments

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    Intervals during which the link is closed, returned as a table.

    Each row of the table denotes a specific interval, and the columns of the table are named as Source, Target, IntervalNumber, StartTime, EndTime, Duration (in seconds), StartOrbit, and EndOrbit. Source and Target are the names of the first and last node, respectively, which define the link analysis.

    • If Source is directly or indirectly attached to a satellite, then StartOrbit and EndOrbit correspond to the satellite associated with Source.

    • If Target is directly or indirectly attached to a satellite, then StartOrbit and EndOrbit correspond to the satellite associated with Target. Otherwise, StartOrbit and EndOrbit are NaN because they are associated with ground stations.

    Note

    When the AutoSimulate property of satellite scenario is true, the link intervals between StartTime and StopTime are returned. When the property is false, the link intervals between StartTime and SimulationTime are returned.

    Version History

    Introduced in R2021a