Published June 19, 2023 | Version v1

Weights to calculate induced part of magnetic scalar potential in time domain for radially-symmetric conductivity model of the Earth

  • 1. Universitiy of Otago
  • 2. ETH Zurich

Description

 Weights  are calculated based on signal interpolation by sincs with time step of 1 hour and memory  4320 hours. Weights are provided up to degree 5.

 A sinc concept is explained in Appendices A and B of Kruglyakov et al (2022) "A proper use of the adjacent land-based  observatory magnetic field data to account for the geomagnetic disturbances during offshore directional drilling"  Space Weather,  https://doi.org/10.1029/2022SW003238.

 1-D (radially-symmetric) conductivity model is based on Table 1 from Kuvshinov et al (2021) "Probing 3-D  electrical conductivity of the mantle using 6 years of Swarm, CryoSat-2 and observatory magnetic data  and exploiting matrix Q-responses approach" Earth, Planets and Space, 73,  https://doi.org/10.1186/s40623-020-01341-9.  The first (surface) layer has 1 km thickness and represents  globally averaged conductance ( 9287 S) of landmasses, oceans, and marine sediments.

 

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