public override LocationTriplet getLocationAsOf(double timeStepFraction)
{
LocationTriplet aTrip = new LocationTriplet();
// inside the array
aTrip.Altitude = Altitude.EvaluatePoly(timeStepFraction);
aTrip.Latitude = Latitude.EvaluatePoly(timeStepFraction);
aTrip.Longitude = Longitude.EvaluatePoly(timeStepFraction);
return(aTrip);
}