The implications of precise timekeeping of Doppler gravitational wave observations

Details The implications of precise timekeeping of Doppler gravitational wave observations The implications of precise timekeeping of Doppler gravitational wave observations

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ptti.nasa..757a&link_type=abstract

In NASA. Goddard Space Flight Center Proc. of the 13th Ann. Precise Time and Time Interval (PTTI) Appl. and Planning Meeting

Astronomy and Astrophysics

Astronomy

1

Detection, Doppler Effect, Gravitational Waves, Hydrogen Masers, Radio Tracking, Time Measurement, Atomic Clocks, Data Processing, Frequency Standards, Relativistic Effects, Spacecraft Tracking

Scientific paper

Gravitational radiation from galactic and extragalactic astrophysical sources will induce spatial strains in the solar system, strains which can be measured directly by the Doppler radio link to distant spacecraft. Current noise sources in Pioneer and Voyager Doppler data are delineated and a comparison is made with expected signal levels from gravitational wave sources. The main conclusion is that it is possible to detect gravitational radiation with current DSN hydrogen maser systems stable in fractional frequency + or - 2 x 10 to the minus 14th power over 1000 sec. In the future, however, a serious Doppler observational program in gravitational wave astronomy will require frequency systems stable to at least 10 to the minus 16th power, but at the same time the current single frequency S-band uplink transmission will have to be replaced by a dual frequency capability.

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