In October 1990, the International Earth Rotation Service (IERS) designated the Communications Research Laboratory (CRL) and Haystack Observatory (in the United States) as Technical Development Centers (TDC).

The Technical Development Centers are concerned with

The TDC meeting is held twice a year, including the special members from outside the CRL. The committee is advised, concerning the plan of Technical Development by the special members . The Technical Development Center News is published biannually by the Communications Research Laboratory to inform on current activities to the IERS community. From the second TDC news, we publish the TDC News only in English taking the international distribution into account.

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