Inverse Problems in Geomagnetism and Gravimetry - with a Focus on Problems

Since over two decades, satellite measurements allow global monitoring of the Earth’s magnetic and gravity field. This has lead to a significant improvement of geomagnetic field models and the possibility to include, e.g., ocean tide generated contributions. Also for others planets, like Mars, some satellite measurements are available. However, many of the interesting problems, like determination of density or magnetization in the Earth’s crust or just the downward continuation of satellite measurements to the Earth’s surface, are severely ill-posed. This refers to numerical instabilities as well as non-uniqueness. We provide some examples on how to address these issues, e.g. by the application of multiscale methods and by a more thorough study of the contributions of magnetizations that can actually be determined uniquely.

Invitation

  • Where: HÜL 485, Hülsse-Bau, Helmholtzstr. 10, Dresden
  • When: February 20th 2020, 17:30, 17:30
  • Who: Prof. Dr. Christian Gerhards (TU Freiberg, Geomathematics and Geoinformatics)