Dr L. Vitushkin is chairman of Study Group 2.1 (Comparison of Absolute Gravimeters) within Commission 2 of the IAG.
 Activities related to the work of Consultative Committees
Mr R. Felder is Executive Secretary of the CCL and joint Secretary to the Joint Working Group CCL/CCTF on Secondary Representations of the Second and the Mise en Pratique of the Metre.
Dr L. Vitushkin is chairman of the CCM Working Group on Gravimetry (WGG).
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Summary
