This document describes the common helper objects and properties used in meteorological Conceptual Model objects schemas.
For detailed info see documentation
Author: Ilkka Rinne / FMI 2009.
From the ICAO's "Annex 3 to the Convention on International Civil Aviation: Meteorological Service for International Air Navigation", Appendix 1, page 16.
From the ICAO's "Annex 3 to the Convention on International Civil Aviation: Meteorological Service for International Air Navigation", Appendix 1, page 16.