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RESOLUTION B6

ENCOURAGING VLBI AND LLR OBSERVATIONS

The XXIIIrd International Astronomical Union General Assembly,

noting

1) resolution B4 proposed by Joint Discussion N. 3

2) resolution B5 endorsing the conclusions of the Working Group on Relativity in Celestial Mechanics and Astronomy (RCMA), Sub-Working Group of the Working Group on Astronomical Standards (WGAS)

considering

1) that regular observation by Very Long Baseline radio Interferometry (VLBI) is the only way to maintain the International Celestial Reference Frame (ICRF),

2) that observation by Lunar Laser Ranging (LLR) is important to connect the solar system reference system with the ICRF, and

3) that VLBI and LLR are the basic observational techniques for determination of the precession and nutation of the Earth,

Recommends

that high-precision astronomical observing programs be organized in such a way that

1) astronomical reference systems can be maintained at the highest possible accuracy for both northern and southern hemispheres, and

2) high accuracy observations of precession-nutation will be made available for comparison with geophysical models and for astronomical and geodetic applications.


Created: 1 Jan 2001. Text provided by the former Central Bureau.

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