API Propagation

There are two possibilities to initialize an orbital propagation using a GtmLeoPropagator or a GtmLeoPropagator object.

LEO propagation

First, we will have to create a GtmLeoPropagator:

final GtmLeoPropagator leo = new GtmLeoPropagator();

Then, we will set all the needed information ...

Initial orbit

We may use the GtmLeoSimpleOrbit object which allows to enter simplified data as defined here

    // Orbit initialization
    final AbsoluteDate date = new AbsoluteDate("2020-01-01T00:00:00.000", GtmConstants.UTC);
    final double hp = 299.e+3;
    final double ha = 300.e+3;
    final double inc = FastMath.toRadians(51.6);
    final GtmLeoSimpleOrbit simpleOrbit = new GtmLeoSimpleOrbit(date, hp, ha, inc);
    leo.setIniOrbit(simpleOrbit.getOrbit());