National Measurement (Recognized-Value Standard of Measurement of Position) Determination 2017 (Cth)

National Measurement (Recognized-Value Standard of Measurement of Position) Determination 2017

I, Dr R. Bruce Warrington, Chief Metrologist, National Measurement Institute, make the following determination.

Dated 11 October 2017

R. BRUCE WARRINGTON

Dr R. Bruce Warrington Chief Metrologist

Contents 1 Name 2 Commencement 3 Authority 4 Definitions 5 Schedules 6 Recognized-value standards of measurement in the Australian Fiducial Network 7 Calculation of global Cartesian coordination at an epoch t years Schedule 1—Recognized-value standards of measurement in the Australian Fiducial Network Schedule 2—Repeals Recognized-value standard of measurement of position 2012 (No. 1)

1 Name This instrument is the National Measurement (Recognized-Value Standard of Measurement of Position) Determination 2017.

2 Commencement This instrument commences the day after registration.

3 Authority This instrument is made under section 8A(1) of the National Measurement Act 1960.

4 Definitions Note: Recognized-value standard of measurement is defined in the Act. In this instrument: Act means the National Measurement Act 1960. Reference Ellipsoid means the Geodetic Reference System 1980 (GRS80) ellipsoid with a semi-major axis (a) of 6 378 137 metres exactly and an inverse flattening (1/f) of 298.257 222 101. Note: The Geodetic Reference System 1980 could in 2017 be viewed on the International Union of Geodesy and Geophysics (IUGG) website (http://www.iugg.org). Reference Epoch means 2020.0. Reference Frame means the Geocentric Datum of Australia 2020 (GDA2020) realised by the coordinates of the Australian Fiducial Network (AFN) geodetic stations, referred to in Schedule 1 of this instrument, in the International Terrestrial Reference Frame 2014 (ITRF2014) at the Reference Epoch. Note 1: The Geocentric Datum of Australia 2020 could in 2017 be viewed on the Intergovernmental Committee on Surveying and Mapping's website (http://www.icsm.gov.au). Note 2: The International Terrestrial Reference Frame 2014 (ITRF2014) could in 2017 be viewed on the International Earth Rotation and Reference Systems Service's (IERS) website (https://www.iers.org).