Electromagnetic Induction by Sq Ionospheric Currents in a Heterogeneous Earth: Modeling Using Ground-based and Satellite Measurements Chapter uri icon


  • We have created a database consisting of hourly means of the geomagnetic field components observed on quiet days in years 2001-2002 on ground observatories, and Orsted and CHAMP satellite measurements covering the same time intervals. In the first part of our study, we use the potential method to estimate the model of external inducing field. Following 3-D simulations are used to evaluate the effect of heterogeneous surface conductance map on Orsted and CHAMP satellite measurements and to compare the results with observations. Improvement of up to 15% with respect to the best 1-D model was observed in surface observatory data as well as in the Orsted and CHAMP measurements. © 2005 Springer-Verlag Berlin Heidelberg.

author list (cited authors)

  • Velímský, J., & Everett, M. E.

citation count

  • 4

Book Title

  • Earth Observation with CHAMP

publication date

  • January 2005