Nils Olsen (DTU Space, Dänemark) Exploring Earth’s magnetic field from Space - Separation of the Various Source Contributions

Nils Olsen (DTU Space, Dänemark) wird auf unserem IAP-Kolloquium einen Vortrag zum Thema "Exploring Earth’s magnetic field from Space - Separation of the Various Source Contributions" halten.

Zusammenfassung:

Starting with the satellites Ørsted and CHAMP 25 years ago, the availability of continuous magnetic field observations from space marked a new era in the investigation of Earth’s magnetic field and its environment. In addition to these single-satellite missions, ESA’s Swarm satellite trio provides simultaneous magnetic field measurements from close-by satellites since 2013, allowing better separation of the various sources contributing to Earth’s magnetic field. Most recently, the launch of the first “Macau Science Satellite” (MSS-1) in May 2023, which collects magnetic data from a low-inclination orbit, and the forthcoming NanoMagSat constellation, in preparation for launch within the next years, provide additional exciting opportunities for investigations of Earth’s magnetic field and geospace.

Despite these advances, the complexity of Earth’s magnetic field—arising from multiple sources, including the core, remanent and induced magnetisation in the crust, and electric currents in the oceans, ionosphere, and magnetosphere, along with their electromagnetic induction effects—poses significant challenges for source separation.

In my talk I will explore the various contributions to Earth’s magnetic field and discuss methodologies for their separation using observations from both space- and ground-based magnetic field measurements.