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Science background

Information about Earth rotation, reference frames, and observation techniques in general - Glossary - References - List of acronyms.

Earth Rotation

The parameters to describe the Earth's rotation and how its irregularities are measured.

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The ICRS

The International Celestial Reference System and its realization, the International Celestial Reference Frame.

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The ITRS

The International Terrestrial Reference System and its realization, the International Terrestrial Reference Frame.

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Recommendations

IAU and IUGG resolutions and recommendations on reference systems and on the IERS.

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Observation techniques

The observation techniques for earth rotation and reference systems: GPS, SLR, LLR, VLBI, and DORIS.

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References

Publications on earth rotation, reference systems, geophysical fluids and on the IERS.

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