Traceability of gravity acceleration measurement in calibration laboratories

Abstract

Primary measurements of force, torque and pressure are directly influenced by local gravity acceleration, g. At present, g measurement in calibration laboratories is evaluated through absolute or relative measurements or through theoretical/empirical relations. Except for some absolute measurements, other methods are not traceable. As consequence, measurements of these quantities could be highly impacted by this lack in terms of accuracy and uncertainty. The Consultative Committee for Mass and related quantities (CCM) of CIPM and International Association of Geodesy (IAG) are currently working on a resolution strategy to ensure traceability to the SI for gravity measurements through the establishment of a global absolute gravity reference system. This network could become a useful tool to transfer the g measurement to calibration laboratories at international level. However, as well any other measurements, this possible solution should be established under the Quality Management system of accredited laboratories.