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-------- Mensaje reenviado --------
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Asunto:
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<td>[Gpmag-l] International Geomagnetic Reference Field:
Thirteenth Generation Released!</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Fecha: </th>
<td>Mon, 6 Jan 2020 18:16:57 +0000</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">De: </th>
<td>Patrick Alken <a class="moz-txt-link-rfc2396E" href="mailto:alken@colorado.edu"><alken@colorado.edu></a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">A: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:gpmag-l@mailman.ucsd.edu">gpmag-l@mailman.ucsd.edu</a>
<a class="moz-txt-link-rfc2396E" href="mailto:gpmag-l@mailman.ucsd.edu"><gpmag-l@mailman.ucsd.edu></a></td>
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<br>
<br>
The thirteenth generation of the International Geomagnetic
Reference Field (IGRF-13) has been released. Fifteen international
teams submitted candidate models for consideration which were
evaluated by a task force, which then voted on how to combine all
the different candidates into a final set of models. The IGRF-13
includes an updated main field model the 2015 epoch (DGRF2015), a
new main field model for the 2020 epoch (IGRF2020), and a
predictive secular variation model for the 2020-2025 time period.
The validity range for IGRF-13 is 1900 to 2025.<br>
<br>
Coefficients and software are available here:
<a class="moz-txt-link-freetext" href="https://www.ngdc.noaa.gov/IAGA/vmod/igrf.html">https://www.ngdc.noaa.gov/IAGA/vmod/igrf.html</a><br>
<br>
A special issue in Earth, Planets and Space is in preparation
which will contain papers on the different candidate models, the
evaluation process, and a final summary paper.<br>
<br>
Thank you,<br>
<br>
Patrick Alken<br>
<br>
IGRF-13 Task Force Chair<br>
<br>
IAGA V-MOD Working Group Chair<br>
<br>
<br>
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