Physics
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979rasc...14..671h&link_type=abstract
(International Union of Radio Science, Open Symposium on Time and Frequency, 1st, Helsinki, Finland, Aug. 1-4, 1978.) Radio Scie
Physics
3
Atomic Clocks, Doppler Effect, Frequency Shift, Frequency Standards, Relativistic Effects, Satellite Tracking, Atomic Beams, Cesium, Instrument Errors, Low Noise, Navigation Technology Satellites, Orbit Calculation, Relativity
Scientific paper
The recently launched (June 23, 1977) Navigation Technology Satellite 2 carries aboard it two high-precision cesium beam atomic standards. The frequencies of these standards were preset to agree with similar ground-based oscillators to within a few parts in 10 to the 12th. An analysis of about 4 days of low-noise Doppler tracking revealed a frequency bias between the orbiting clocks and the ground-based clocks at the tracking sites. This observed bias was 4.47 parts in 10 to the 10th, which is consistent with a predicted frequency bias arising from the special relativity time dilation effect coupled with a frequency blue shift predicted by general relativity.
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