Newsletter 4 of the subgroup T5 of the IAU WG ICRS

New parameters for the Earth orientation in the ICRS

(3 February 2000)

The present Newsletter of the subgroup T5 is devoted to a discussion concerning new parameters for representing the orientation of the Earth in the ICRS.

This Newsletter includes the following sections :

• 1. The current Earth orientation parameters


• 2. Proposals for new parameters


• 3. Questions to the subgroup T5