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Fix/issue 137 wmm2020 - #200

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BenjaminLeconte wants to merge 4 commits into
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BenjaminLeconte:fix/issue-137-wmm2020
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Fix/issue 137 wmm2020#200
BenjaminLeconte wants to merge 4 commits into
OpenSeaMap:masterfrom
BenjaminLeconte:fix/issue-137-wmm2020

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@BenjaminLeconte

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I prepared a fix for this issue #137 in this pull request

The magnetic model coefficients have been updated from WMM2015v2 to the official WMM2020 coefficients released by NOAA.

No algorithm changes were required because the existing geomagnetic implementation already loads the coefficients dynamically from WMM.COF.

The update was verified locally with:

  • php -l index.php
  • git diff --check
  • validation of the WMM2020 file header and coefficient format

The updated model header is:

2020.0 WMM-2020 12/10/2019

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