Measurement of the gravitational frequency shift in the radio range with the aid of an artificial earth satellite

Physics

Scientific paper

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Frequency Shift, Gravitational Effects, Ionospheric Propagation, Maser Outputs, Satellite-Borne Instruments, Signal Transmission, Cosmos Satellites, Doppler Effect, Gravitational Fields, Interferometry

Scientific paper

Results are presented for an experiment which measured the gravitational frequency shift using ammonia molecular-beam masers on board Cosmos-145 and on the ground. Maser signals at 770 MHz were transmitted to the satellite and sent back to earth at a higher frequency, and the gravitational frequency shift was measured by dispersion interferometry. The relative frequency stability during the experiment was found to be approximately 10 to the -11th power, and the observed frequency shift was found to agree with the theoretical value both in magnitude and sign.

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