Document ID: chunk:federal_register_of_legislation:F2017L01352:clause:2_4
Version: federal_register_of_legislation:F2017L01352
Segment Type: clause
Provision Reference: sch 2 cl 4
Character Range: 1024–2211

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).