Bartolome Coll and Albert Tarantola have proposed using pulsars “To Define Space-Time Co-ordinates.” In essence, a GPS system for spacecraft in the solar system and beyond. The summary of their paper, published at arxiv.org, is summarized this way:

Fully relativistic coordinates have been proposed for (relativistically) running a “GPS” system. These coordinates are the arrival times of the light signals emitted by four “satellites” (clocks). Replacing the signals emitted by four controlled clocks by the signals emitted by four pulsars defines a coordinate system with lower accuracy, but valid across the whole Solar System. We here precisely define this new coordinate system, by choosing four particular pulsars and a particular event as the origin of the coordinates.

The full paper may be downloaded from the arxiv.org site.

Via Geekpress.com.

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