EarthRef.org Digital Archive (ERDA) -- CALS10k.2 and HFM.OL1.A1 geomagnetic field models and fortran code for evaluation

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Detailed File Information

CALS10k.2 and HFM.OL1.A1 geomagnetic field models and fortran code for evaluation

File Name	erda.models.zip
Data Type	program source code
Computer Program	CALS10kcoefs 2016
File Size	681.00 KB - 1 file
Expert Level	State-of-the-art Science
Contributor	Cathy Constable
Source	Constable et al. 2016
Resource Matrix	The History of the Earth's Magnetic Field

Description
CALS10k.2 and HFM.OL1.A1 are two continuous global geomagnetic field model for the past 10 millennia, covering the time span from 8000 BC to 1990AD. The models were constructed using by regularized least squares inversion of archeo- and paleomagnetic data using spherical harmonics in space and cubic B-splines in time.
The two models are provided here, together with Fortran codes for extracting the coefficients and for evaluating the field in time and space.