Artist’s interpretation of
the Jason 2 satellite.
Imager. Image courtesy:
Old Tool, New Use: GPS and the Terrestrial Reference Frame
Satellites need to know exactly where they are in the sky. For that to be possible they need to have a reference frame to anchor their location. An internationally ratified terrestrial reference frame serves this purpose. But could it be improved? Could GPS help? Read this month's column to find out! [PDF]