Orbit determination for next generation space clocks

Details Orbit determination for next generation space clocks Orbit determination for next generation space clocks

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...504..653d&link_type=abstract

Astronomy and Astrophysics, Volume 504, Issue 2, 2009, pp.653-661

Astronomy and Astrophysics

Astrophysics

5

Relativity, Reference Systems, Time, Ephemerides, Instrumentation: Miscellaneous, Space Vehicles: Instruments

Scientific paper

We study the requirements on orbit determination compatible with operation of next generation space clocks at their expected uncertainty. Using the ACES (Atomic Clock Ensemble in Space) mission as an example, we develop a relativistic model for time and frequency transfer to investigate the effects of orbit determination errors. For the orbit error models considered we show that the required uncertainty goal can be reached with relatively modest constraints on the orbit determination of the space clock, which are significantly less stringent than expected from “naive” estimates. Our results are generic to all space clocks and represent a significant step towards the generalized use of next generation space clocks in fundamental physics, geodesy, and time/frequency metrology.

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