advance

Move simulation forward by one sample time

Since R2022a

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    Syntax

    isrunning = advance(sc)

    Description

    isrunning = advance(sc) moves the simulation forward by the amount of time specified by the SampleTime property of the scenario sc.

    example

    Examples

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    This example uses:

    Open Live Script

    Create a satellite scenario object and set the AutoSimulate property to false to enable manual simulation of the satellite scenario.

    sc = satelliteScenario('AutoSimulate',false);

    Add a GPS satellite constellation to the scenario.

    sat = satellite(sc,"gpsAlmanac.txt");

    Simulate the scenario using the advance function.

    while advance(sc)
end

    Obtain the satellite position histories.

    p = states(sat);

    AutoSimulate is false, so restart the scenario before adding a ground station. 

    restart(sc);

    Add a ground station to the scenario.

    gs = groundStation(sc);

    Add access analysis between each satellite and ground station.

    ac = access(sat,gs);

    Simulate the scenario and determine the access intervals.

    while advance(sc)
end
intvls1 = accessIntervals(ac)
    intvls1=35×8 table
     Source           Target           IntervalNumber         StartTime                EndTime           Duration    StartOrbit    EndOrbit
    ________    ___________________    ______________    ____________________    ____________________    ________    __________    ________

    "PRN:1"     "Ground station 32"          1           11-Jan-2020 23:20:25    12-Jan-2020 05:15:47      21322        NaN          NaN   
    "PRN:2"     "Ground station 32"          1           12-Jan-2020 04:03:16    12-Jan-2020 07:48:06      13490        NaN          NaN   
    "PRN:3"     "Ground station 32"          1           11-Jan-2020 19:50:06    11-Jan-2020 21:38:53     6527.3        NaN          NaN   
    "PRN:3"     "Ground station 32"          2           12-Jan-2020 01:52:43    12-Jan-2020 06:42:49      17406        NaN          NaN   
    "PRN:4"     "Ground station 32"          1           11-Jan-2020 19:50:06    12-Jan-2020 00:11:11      15665        NaN          NaN   
    "PRN:4"     "Ground station 32"          2           12-Jan-2020 04:54:02    12-Jan-2020 07:48:06      10444        NaN          NaN   
    "PRN:5"     "Ground station 32"          1           12-Jan-2020 05:52:03    12-Jan-2020 07:48:06     6962.4        NaN          NaN   
    "PRN:6"     "Ground station 32"          1           12-Jan-2020 02:43:29    12-Jan-2020 07:48:06      18276        NaN          NaN   
    "PRN:7"     "Ground station 32"          1           11-Jan-2020 21:09:52    12-Jan-2020 03:27:00      22628        NaN          NaN   
    "PRN:8"     "Ground station 32"          1           11-Jan-2020 20:33:36    12-Jan-2020 03:19:45      24369        NaN          NaN   
    "PRN:9"     "Ground station 32"          1           11-Jan-2020 19:50:06    12-Jan-2020 00:47:27      17841        NaN          NaN   
    "PRN:9"     "Ground station 32"          2           12-Jan-2020 05:08:32    12-Jan-2020 07:48:06     9573.3        NaN          NaN   
    "PRN:10"    "Ground station 32"          1           12-Jan-2020 00:32:56    12-Jan-2020 01:59:58     5221.8        NaN          NaN   
    "PRN:11"    "Ground station 32"          1           11-Jan-2020 22:15:09    12-Jan-2020 04:39:32      23063        NaN          NaN   
    "PRN:12"    "Ground station 32"          1           12-Jan-2020 04:32:16    12-Jan-2020 07:48:06      11749        NaN          NaN   
    "PRN:13"    "Ground station 32"          1           12-Jan-2020 00:03:56    12-Jan-2020 02:50:44      10008        NaN          NaN   
      ⋮

    Visualize the simulation results.

    v = satelliteScenarioViewer(sc,'ShowDetails',false);
play(sc);

    Verify that the access intervals are the same when you set the AutoSimulate property to true.

    sc.AutoSimulate = true;
intvls2 = accessIntervals(ac)
    intvls2=35×8 table
     Source           Target           IntervalNumber         StartTime                EndTime           Duration    StartOrbit    EndOrbit
    ________    ___________________    ______________    ____________________    ____________________    ________    __________    ________

    "PRN:1"     "Ground station 32"          1           11-Jan-2020 23:20:25    12-Jan-2020 05:15:47      21322        NaN          NaN   
    "PRN:2"     "Ground station 32"          1           12-Jan-2020 04:03:16    12-Jan-2020 07:48:06      13490        NaN          NaN   
    "PRN:3"     "Ground station 32"          1           11-Jan-2020 19:50:06    11-Jan-2020 21:38:53     6527.3        NaN          NaN   
    "PRN:3"     "Ground station 32"          2           12-Jan-2020 01:52:43    12-Jan-2020 06:42:49      17406        NaN          NaN   
    "PRN:4"     "Ground station 32"          1           11-Jan-2020 19:50:06    12-Jan-2020 00:11:11      15665        NaN          NaN   
    "PRN:4"     "Ground station 32"          2           12-Jan-2020 04:54:02    12-Jan-2020 07:48:06      10444        NaN          NaN   
    "PRN:5"     "Ground station 32"          1           12-Jan-2020 05:52:03    12-Jan-2020 07:48:06     6962.4        NaN          NaN   
    "PRN:6"     "Ground station 32"          1           12-Jan-2020 02:43:29    12-Jan-2020 07:48:06      18276        NaN          NaN   
    "PRN:7"     "Ground station 32"          1           11-Jan-2020 21:09:52    12-Jan-2020 03:27:00      22628        NaN          NaN   
    "PRN:8"     "Ground station 32"          1           11-Jan-2020 20:33:36    12-Jan-2020 03:19:45      24369        NaN          NaN   
    "PRN:9"     "Ground station 32"          1           11-Jan-2020 19:50:06    12-Jan-2020 00:47:27      17841        NaN          NaN   
    "PRN:9"     "Ground station 32"          2           12-Jan-2020 05:08:32    12-Jan-2020 07:48:06     9573.3        NaN          NaN   
    "PRN:10"    "Ground station 32"          1           12-Jan-2020 00:32:56    12-Jan-2020 01:59:58     5221.8        NaN          NaN   
    "PRN:11"    "Ground station 32"          1           11-Jan-2020 22:15:09    12-Jan-2020 04:39:32      23063        NaN          NaN   
    "PRN:12"    "Ground station 32"          1           12-Jan-2020 04:32:16    12-Jan-2020 07:48:06      11749        NaN          NaN   
    "PRN:13"    "Ground station 32"          1           12-Jan-2020 00:03:56    12-Jan-2020 02:50:44      10008        NaN          NaN   
      ⋮

    Visualize the scenario.

    play(sc);

    Input Arguments

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    Satellite scenario, specified as a satelliteScenario object. The argument applies only if the AutoSimulate property of the sc object is false.

    Output Arguments

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    Running status of the satellite scenario simulation, returned as a logical 1 (true) or 0 (false). The isrunning value is true until the scenario reaches the specified StopTime value.

    Version History

    Introduced in R2022a

    See Also

    Objects

    Functions