, Volume 6, Issue 1, pp 13-32

An orbiting clock experiment to determine the gravitational red shift

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Plans are presented for an experiment to measure the gravitational red shift of the Earth by comparing a ground-based and satellite-borne hydrogen maser clock. The limiting accuracy is estimated to yield a determination of the red shift to 1 part in 105, corresponding to a clock stability of 3 parts in 1015.

This work was supported by the National Aeronautics and Space Administration.