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DynamicEarth - SPP 1788

DFG ("Deutsche ForschungsGemeinschaft") SPP ("SchwerPunktProgramme") - DFG Priority Programme

System Earth changes continuously. Variations of Earth's interior, the atmosphere, the oceans, and near-Earth space give rise to changes in global potential fields, particularly in Earth's magnetic and gravity fields. The underlying processes can be identified and studied through monitoring and analysis of fundamental geomagnetic and gravity parameters. The main focus of this Priority Programme is to quantify terrestrial transport mechanisms and solar-terrestrial interactions. The research programme builds on data from satellites on low-Earth orbits, such as CHAMP, GRACE, and GOCE. Of particular importance is the multi-satellite mission Swarm. Variations of the potential fields can be measured across a broad spectral range of spatial and temporal scales. Other parameters can be analysed, as well as ground-based observations and modelling results, to complement the understanding of the system Earth. The key to successfully investigating the range of topics in this programme is a multidisciplinary approach. The focus of work will be on the following areas:

  • Geomagnetic field
  • Gravity field
  • Current systems of the ionosphere/magnetosphere
  • Thermosphere/ionosphere

More information about this project can be found at
Project duration: June 2015 - June 2021.

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Swarm for Anomalies - Swarm4Anom

Space Research Centre PAS (Polish acdemy of Sciences) in cooperation with a start-up OBSEE

Ionisation reversed diurnal cycle is one of distinctive features of the Earth`s ionosphere, which is characterised by higher values of ionospheric plasma density registered in the nighttime than in the daytime. Two well known examples of this phenomenon are the Weddell Sea Anomaly (WSA) and the mid-latitude nighttime summer anomaly (MSNA).
The Weddell Sea Anomaly (WSA) is a mid-latitude F region ionosphere phenomena taking place over the regions west of the Antarctic Peninsula.Though the WSA has been discovered more than 60 years ago, still its generation mechanism is not fully understood and its modelling remains a challenge. Initial discovery of the WSA relied on measurements from the ground network of ionosondes. Satellite observations revealed that peculiar feature of the ionosphere is not limited to the southern hemisphere only. Similar behaviour is also present in the northern hemisphere.
In situ registrations of electron density from the Langmuir probe on board three Swarm satellites are used to study spatial and temporal evolution of nighttime plasma density enhancements (NPDEs). The study introduces the normalized density difference index I_NDD in order to provide global estimates of the phenomenon. I_NDD is provided to User`s as higher level product derived from Swarm data.

More information about this project can be found at
This project is funded by the ESA, Contract No. 4000112769/14/NL/FF/gp.

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