Spacecraft Navigation Using X-Ray Pulsars

The feasibility of determining spacecraft time and position using x-ray pulsars is explored. Pulsars are rapidly rotating neutron stars that generate pulsed electromagnetic radiation. A detailed analysis of eight x-ray pulsars is presented to quantify expected spacecraft position accuracy based on d...

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Bibliographic Details
Published in:Journal of guidance, control, and dynamics control, and dynamics, 2006-01, Vol.29 (1), p.49-63
Main Authors: Sheikh, Suneel I, Pines, Darryll J, Ray, Paul S, Wood, Kent S, Lovellette, Michael N, Wolff, Michael T
Format: Article
Language:English
Subjects:
Aerospace engineering
Applied sciences
Computer science
control theory
systems
Control theory. Systems
Exact sciences and technology
Global positioning systems
GPS
Magnetic fields
Neutron stars
Neutrons
Pulsars
Radiation
Vehicles
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Summary:The feasibility of determining spacecraft time and position using x-ray pulsars is explored. Pulsars are rapidly rotating neutron stars that generate pulsed electromagnetic radiation. A detailed analysis of eight x-ray pulsars is presented to quantify expected spacecraft position accuracy based on described pulsar properties, detector parameters, and pulsar observation times. In addition, a time transformation equation is developed to provide comparisons of measured and predicted pulse time of arrival for accurate time and position determination. This model is used in a new pulsar navigation approach that provides corrections to estimated spacecraft position. This approach is evaluated using recorded flight data obtained from the unconventional stellar aspect x-ray timing experiment. Results from these data provide first demonstration of position determination using the Crab pulsar.
ISSN:0731-5090
1533-3884
DOI:10.2514/1.13331