The absolute determination of the gravitational acceleration at Sydney, Australia

An absolute measurement of the gravitational acceleration “g” has been made at the National Standards Laboratory, Chippendale, N.S.W., Australia. The determination was made by studying the free motion of a body projected vertically upwards in a vacuum and the time between its initial and final passages through two horizontal planes of known vertical separation was measured. The measured value ofg at a point 12 metres above the floor in room B. 37 of the National Standards Laboratory is 9.7967134 m/s² The corresponding value at floor level at the BMR gravity station is 9.796717 m/s² Paper presented at the meeting of the International Gravimetric Commission, Paris 7–11 September 1970.