/// <summary>
/// Add an element using an existing OrbitUniversal instance
///
/// Orbit elements must be added in increasing time order.
/// </summary>
/// <param name="orbitU"></param>
/// <param name="callback">(Optional) Method to call when sequence starts</param>
public void AppendElementExistingOrbitU(OrbitUniversal orbitU, ElementStarted callback)
{
if (BadTime(orbitU.GetStartTime()))
{
return;
}
KeplerElement ke = new KeplerElement
{
timeStart = orbitU.GetStartTime(),
returnToGE = false
};
ke.orbit = orbitU;
ke.callback = callback;
keplerElements.Add(ke);
}