International Geomagnetic Reference Field: the thirteenth generation

International Geomagnetic Reference Field: the thirteenth generation
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DOI:
10.1186/s40623-020-01288-x
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发表时间:
2021-02-11
影响因子:
3
通讯作者:
Zhou, B.
Zhou, B.
中科院分区:
地球科学3区
文献类型:
--
作者:
Alken, P.;Thebault, E.;Zhou, B.

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2019年12月,国际地磁学与高层大气物理学协会(IAGA)第五工作组(V-MOD)通过了第十三代国际地磁参考场(IGRF)。这个IGRF更新了上一代的确定性主场模型为历元2015.0,主场模型为历元2020.0,和预测的线性长期变化为2020.0至2025.0。这封信提供了定义IGRF的方程,第十三代模型的球谐系数,2020.0历元的磁衰减图,倾角和总场强,以及2020.0到2025.0时间段的预测变化率。
In December 2019, the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD) adopted the thirteenth generation of the International Geomagnetic Reference Field (IGRF). This IGRF updates the previous generation with a definitive main field model for epoch 2015.0, a main field model for epoch 2020.0, and a predictive linear secular variation for 2020.0 to 2025.0. This letter provides the equations defining the IGRF, the spherical harmonic coefficients for this thirteenth generation model, maps of magnetic declination, inclination and total field intensity for the epoch 2020.0, and maps of their predicted rate of change for the 2020.0 to 2025.0 time period.