GGOS Focus Area

Unified Height System


The current objectives of the GGOS-FA-UHS focus on the implementation of the International Height Reference System (IHRS), in particular:

  • the compilation of detailed standards, conventions, and guidelines to make the IAG Resolution applicable.
  • the establishment of the International Height Reference Frame (IHRF) as the realization of the IHRS.
  • the evaluation of the achievable accuracy under the present conditions (data availability, computation methods, etc.) and the identification of key actions to improve the determination of the IHRF coordinates.
  • the development of an operational infrastructure within the International Gravity Field Service IGFS) to ensure the maintenance and availability of the IHRF in a long-term basis.