Close proximity operations around small bodies are extremely challenging due to their uncertain dynamical environment. Autonomous guidance and navigation require fast accurate modeling of the gravitational field for potential on-board computation. In this paper, we investigate a model-based, data-driven approach compute predict acceleration irregular bodies. More specifically, employ Extreme Le...

This study synthesized knowledge regarding waveand current-supported sediment gravity flows and their importance to shelf deposition and morphology. Data and publications from STRATAFORM, EuroSTRATAFORM and several river-nourished shelves in Asia and the Western Pacific were reviewed and models for wave-supported fluid muds and resulting gravity flows were applied. Field and modeling evidence s...

Satellite data that are used to model the global gravity field of the Earth are typically corrupted by correlated noise, which can be related to a frequency dependence of the data accuracy. We show an opportunity to take such noise into account by using a proper noise covariance matrix in the estimation procedure. If the dependence of noise on frequency is not known a priori, it can be estimate...

One of the factors which affects the gas lift performance is specific gravity of a lift gas (or the Molecular weight), which can influence the gas solubility in oil and has a direct effect on the gas lift performance. There are some previous researches which have included the lift gas specific gravity in their modeling, but in none of them, a comprehensive research about the effect of lift gas ...