Traceability of gravity acceleration measurement in calibration laboratories

Primary measurements of force, torque and pressureare directly influenced by local gravityacceleration,g. At present, gmeasurementin calibration laboratoriesisevaluated through absolute or relative measurementsor through theoretical/empiricalrelations. Except forsome absolute measurements, other methods are not traceable. As consequence, measurementsofthesequantities could behighly impacted by this lackin terms of accuracy and uncertainty.The Consultative Committee for Mass and related quantities (CCM) of CIPM and International Association of Geodesy (IAG) arecurrently working ona resolutionstrategy to ensure traceability to the SI for gravity measurementsthrough the establishment of a global absolute gravity reference system. Thisnetwork could becomea useful tool to transferthe gmeasurement to calibration laboratories at international level. However, as well any other measurements, thispossible solution should be established under the Quality Management system of accredited laboratories.