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Determination of high frequency variations in earth's rotation from Doppler satellite observations

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Abstract

The determination of high frequency variations in UT-1 and a component of pole position from a single pass of Doppler observations of a Navy Navigation Satellite is affected by instrument errors and uncertainties in the gravity field and atmospheric drag forces used in computing the satellite orbit. For elevation angles above20°, instrument errors contribute about2 msec to the determination of UT-1 and “.03 to the determination of pole position. Gravity and drag errors contribute about 0“.03 of correlated error. But gravity errors may be inferred by statistical analysis of residuuls after drag errors are reduced by drag-compensating devices aboard future Navy Navigation Satellites. Since20 Doppler stations nominally acquire about100 passes each day, daily observations of UT-1 and pole position could achieve precisions of0.2 msec and “.005, respectively, assuming half the passes contribute to the determination of each component of pole position. The current accuracy of Doppler results for two day solutions is about50 cm for pole position and1 msec for high frequency variations in UT-1.

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References

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Authors and Affiliations

  1. Naval Surface Weapons Center, 22448, Dahlgren, Va., U.S.A.

    R. J. Anderle & C. Oesterwinter

Authors
  1. R. J. Anderle
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  2. C. Oesterwinter
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Anderle, R.J., Oesterwinter, C. Determination of high frequency variations in earth's rotation from Doppler satellite observations. Bull. Geodesique 54, 544–552 (1980). https://doi.org/10.1007/BF02530712

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  • DOI: https://doi.org/10.1007/BF02530712

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