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Earth, Planets and Space
Fig. 11 | Earth, Planets and Space

Fig. 11

From: The CSES global geomagnetic field model (CGGM): an IGRF-type global geomagnetic field model based on data from the China Seismo-Electromagnetic Satellite

Fig. 11

CGGM candidate IGRF 2020 model a posteriori assessment. Top: Lowes–Mauersberger spectrum of the difference between the CGGM candidate IGRF 2020 model and the final IGRF 2020 model (CSES, thick black line); also shown are analogous spectra computed for the 11 other candidate models (BGS, solid red; CU/NCEI solid green; DTU, solid dark blue; GFZ, solid purple; IPGP, solid light blue; ISTerre, dashed yellow; IZMIRAN, dashed red; Potsdam/MaxPlanck, dashed green; Spanish, dashed dark blue; Strasbourg, dashed purple; NASA dashed light blue); bottom: radial component of the difference between the predictions of the CGGM candidate IGRF 2020 and final IGRF 2020 models; all plots at Earth’s surface. Gauss coefficients are used at the officially required 0.01 nT resolution (closest rounding) for candidate models and official 0.1 nT resolution for the final IGRF 2020 model (as published in Alken et al. 2020b)

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