Abstract
The role of nonlinearity of the measurement model and its interactions with the uncertainty of measurements and geometry of the problem is studied in this paper. An examination of the transformations of the probability density function in various coordinate systems is presented for several astrodynamics applications. Smooth and analytic nonlinear functions are considered for the studies on the exact transformation of uncertainty. Special emphasis is given to understanding the role of change of variables in the calculus of random variables. The transformation of probability density functions through mappings is shown to provide insight in to understanding the evolution of uncertainty in nonlinear systems. Examples are presented to highlight salient aspects of the discussion. A sequential orbit determination problem is analyzed, where the transformation formula provides useful insights for making the choice of coordinates for estimation of dynamic systems.
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Dedicated to Professor Kyle T. Alfriend for his contributions in Astronautics.
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Majji, M., Junkins, J.L. & Turner, J.D. Measurement Model Nonlinearity in Estimation of Dynamical Systems. J of Astronaut Sci 59, 41–62 (2012). https://doi.org/10.1007/s40295-013-0005-6
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DOI: https://doi.org/10.1007/s40295-013-0005-6