Abstract The article discusses a computing system for determining the location of an object by using satellite monitoring in real time with high accuracy. proposed authors is based on determination triple phase differences. High coordinate accuracy ensured entering additional data, such as tropospheric and ionospheric models. resulting currently being tested.

A method for the multifidelity Monte Carlo (MFMC) estimation of statistical quantities is proposed which applicable to computational budgets any size. Based on a sequence optimization problems each with globally minimizing closed-form solution, this extends usability well known MFMC algorithm, recovering it when budget large enough. Theoretical results verify that approach at least as optimal i...