World magenetic model (wmm) 2025 update 1. as part of the regular update cycle of the world magnetic model…

Original warning text

WORLD MAGENETIC MODEL (WMM) 2025 UPDATE
1. AS PART OF THE REGULAR UPDATE CYCLE OF THE
   WORLD MAGNETIC MODEL (WMM),
   THE NATIONAL OCEANOGRAPHIC & ATMOSPHERIC
   ADMINISTRATION (NOAA)/ NATIONAL CENTERS
   FOR ENVIRONMENTAL INFORMATION (NCEI), IN
   COLLABORATION WITH THE BRITISH GEOLOGICAL
   SURVEY (BGS), WILL RELEASE THE WMM2025
   ON 17 DEC 24. THE CURRENT 2020 WMM
   WILL EXPIRE ON 31 DEC 24.
2. IN ORDER TO AVOID ANY MODEL PERFORMANCE
   DEGRADATION, USERS ARE RECOMMENDED TO
   DOWNLOAD AND INSTALL THE WMM2025 MODEL
   COEFFICIENTS, WHICH WILL BE PUBLISHED ONLINE
   AT HTTPS://WWW.NCEI.NOAA.GOV/PRODUCTS/
   WORLD-MAGNETIC-MODEL.
3. THE WMM IS THE STANDARD MODEL USED BY
   THE U.S. DEPARTMENT OF DEFENSE (DOD),
   CIVIL AGENCIES, THE NORTH ATLANTIC TREATY
   ORGANIZATION (NATO), AND THE INTERNATIONAL
   HYDROGRAPHIC ORGANIZATION, OR A
   WIDE-RANGE OF POSITIONING AND NAVIGATION
   SYSEM APPLICATIONS THAT USE THE
   GEOMAGNETIC FIELD, INCLUDING ALL AIRCRAFT,
   SHIPS, SUBMARINES, AND GPS UNITS.
4. FOR SOME USERS THAT HAVE REQUESTED A WMM
   WITH PERFORMANCE THAT EXCEEDS MILITARY
   REQUIREMENTS, NGA HAS ADDED AN ADVANCED
   WMMHR2025 (HIGH RESOLUTION) TO THIS WMM
   RELEASE CYCLE. WMMHR2025 IS FOR THOSE SYSTEMS
   THAT CAN ACCEPT ADDITIONAL MODEL COEFFICIENTS
   BEYOND THOSE PROVIDED IN ALL PRIOR WMM RELEASES.
   NGA ENCOURAGES, BUT DOES NOT REQUIRE,
   USERS TO UPDATE THEIR SYSTEMS WITH
   WMMHR2025 WHEN THIS IS RELEASED. FOR TEST
   PURPOSES, A BETA VERSION (WMMHR2020)
   CAN BE DOWNLOADED FROM THE NOAA AND
   NGA WMM OPENSOURCE WEBSITES BEGINNING 9/1/2024.
   SEE HTTPS://WWW.NGDC.NOAA.GOV/GEOMAG/
   DATA/WMM/WMMHR/ FOR A COMPLETE DESCRIPTION.
   NGA REQUESTS USERS PROVIDE FEEDBACK ON
   BETA PERFORMANCE TO NOAA
   EMAIL:GEOMAG.MODELS@NOAA.GOV.
5. CANCEL THIS MSG 010001Z JAN 25.