Gravity Probe C(lock) - Probing the gravitomagnetic field of the Earth by means of a clock experiment

Details Gravity Probe C(lock) - Probing the gravitomagnetic field of the Earth by means of a clock experiment Gravity Probe C(lock) - Probing the gravitomagnetic field of the Earth by means of a clock experiment

1997-12-11

arxiv.org/abs/gr-qc/9712054v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages LATEX, to appear in the Proceedings of the Alpbach Summer School 1997 ``Fundamental Physics in Space'', organised by t

Scientific paper

We outline a mission with the aim of directly detecting the gravitomagnetic field of the Earth. This mission is called Gravity Probe C. Gravity Probe C(lock) is based on a recently discovered and surprisingly large gravitomagnetic clock effect. The main idea is to compare the proper time of two standard clocks in direct and retrograde orbits around the Earth. After one orbit the proper time difference of two such clocks is predicted to be of the order of $2\times 10^{-7}$ s. The conceptual difficulty to perform Gravity Probe C is expected to be comparable to that of the Gravity Probe B--mission.

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