Orbital uncertainty propagation plays an important role in space situational awareness
related missions such as tracking and data association, conjunction assessment, sensor …

Since the late 1950s, when the first artificial satellite was launched, the number of Resident
Space Objects has steadily increased. It is estimated that around one million objects larger …

Polynomial chaos expansion and Gaussian mixture models are combined in a hybrid
fashion to propagate state uncertainty for spacecraft with initial Gaussian errors. Polynomial …

This paper presents a computationally efficient approach to evaluate multidimensional
expectation integrals. Specifically, certain nonproduct cubature points are constructed that …

This paper presents a methodology to estimate the probability of conjunction between two
space objects when probability density functions for orbital state vector are significantly non …

Long-term configuration stability is essential for an interferometric detection constellation
(IDC), which is closely related to initial uncertainty. Therefore, it is vital to evaluate the …

A comprehensive study is performed for low Earth orbit (LEO) space vehicles (SVs) tracking
by a receiver opportunistically extracting navigation observables from their downlink radio …

Orbit prediction accuracy is often limited by the underlying physics-based models and
estimation methods. Instead of advancing the state-of-the-art from those two aspects, we …

This paper proposes an innovative approach for constrained rendezvous trajectory
optimization (CRTO) using stochastic optimal feedback control and unscented transform …

Abstract The field of Space Situational Awareness (SSA) has progressed over the last few
decades with new sensors coming online, the development of new approaches for making …