[1]College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;
[1]College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;
[2]Department of Aerospace Science and Technology,Politecnico di Milano,Milano 20156,Italy;
[2]Department of Aerospace Science and Technology,Politecnico di Milano,Milano 20156,Italy;
nonlinear orbit; uncertainty propagation; differential algebra; Gaussian mixture model; taylor expansion;