What question did this study set out to answer?

To characterize the spatial dimensions and temporal persistence of small-scale and large-scale field-aligned currents using multi-point satellite measurements.

December 15, 2014Geophysical Research LettersOpen Access

Field-aligned currents' scale analysis performed with the Swarm constellation

View Full Paper

Ask AI

Bookmark

To characterize the spatial dimensions and temporal persistence of small-scale and large-scale field-aligned currents using multi-point satellite measurements.
Analyzed magnetic field data from the European Space Agency's multi-satellite Swarm constellation.
Categorized field-aligned currents into small-scale (under tens of kilometers, driven by kinetic Alfvén waves) and large-scale (greater than 150 kilometers) regimes.
Evaluated temporal stability via orbital crossovers over polar regions and measured longitudinal-to-latitudinal spatial aspect ratios.
Small-scale field-aligned currents showed a persistent lifespan of roughly 10 seconds, whereas large-scale currents remained stationary for over 60 seconds.
Nightside large-scale currents exhibited a longitudinal width averaging 4 times their latitudinal extent, whereas dayside currents in the cusp region displayed roughly equal longitudinal and latitudinal dimensions.

Authors

HLH. LührGFZ Helmholtz Centre for Geosciences JPJaeheung ParkKorea Astronomy and Space Science Institute JGJ. W. GjerloevUniversity of America

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Observational satellite analysis reveals distinct temporal and spatial scales of field-aligned currents, indicating asymmetric geometries across Earth's dayside and nightside auroral regions.

Cite This Study

Lühr et al. (2014) studied this question.

synapsesocial.com/papers/6a78cb4e64a233964701fb4a https://doi.org/10.1002/2014gl062453

View Full Paper

Ask AI

Bookmark

Implication

Observational satellite analysis reveals distinct temporal and spatial scales of field-aligned currents, indicating asymmetric geometries across Earth's dayside and nightside auroral regions.

Field-aligned currents' scale analysis performed with the Swarm constellation

Key Points

Discussion

Implication

Cite This Study

Field-aligned currents' scale analysis performed with the Swarm constellation

Key Points

Discussion

Implication

Cite This Study