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- W4306922433 abstract "A method to resolve initialization ambiguities encountered in x-ray-based pulsar navigation in deep space is presented. Prior work has shown that x-ray signals from pulsars can be used to determine the position of a spacecraft relative to its starting point. However, determining the initial position is still a challenge. This challenge is addressed in this paper by developing an algorithm which uses gravitational acceleration “maps” that are a function of a spacecrafts position in the solar system. We show that the spacecraft acceleration can be estimated from the Doppler shift of pulsar signals tracked by a spacecraft. Given the acceleration estimate, one can place the location of the spacecraft in the acceleration map. The proposed algorithm is validated using observation data from the Neutron Star Interior Composition Explorer (NICER) observatory aboard the International Space Station (ISS). It shown that the method can provide an initial position estimate that is accurate within 1 4 of the period of many pulsars that are proposed for use in deep space navigation." @default.
- W4306922433 created "2022-10-21" @default.
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- W4306922433 date "2022-10-20" @default.
- W4306922433 modified "2023-09-27" @default.
- W4306922433 title "Gravitational Acceleration Maps for Initialization and Ambiguity Resolution of Pulsar-Based PNT in Space" @default.
- W4306922433 doi "https://doi.org/10.33012/2022.18542" @default.
- W4306922433 hasPublicationYear "2022" @default.
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