Magazine Article

Time-Transfer System for Two Orbiting Spacecraft

TBMG-814

05/01/2004

Abstract
Content

A report describes the time-transfer system of the Gravity Recovery and Climate Experiment (GRACE), in which information on the distribution of Earth mass is extracted from position and time measurements for two spacecraft about 200 km apart in a circular, nearly polar orbit. Each spacecraft carriers a Global Positioning System (GPS) receiver, a K/Ka-band ranging (KBR) instrument, and an ultra-stable oscillator (USO) that serves as a clock for the GPS and KBR units.

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Citation
"Time-Transfer System for Two Orbiting Spacecraft," Mobility Engineering, May 1, 2004.
Additional Details
Publisher
Published
May 1, 2004
Product Code
TBMG-814
Content Type
Magazine Article
Language
English