Authors
This python wrapper is made by:
Karl M. Laundal
Christer van der Meeren
Angeline G. Burrell (maintainer)
Leslie Lamarche
Gregory Starr
Ashton Reimer
Achim Morschhauser
Fortran code by Emmert et al. [2010] [1]. Quasi-dipole and modified apex coordinates are defined by Richmond [1995] [2]. The code uses IGRF-12 with coefficients valid through 2020 [Thébault et al., 2015] [3].