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Table 1
The dependent variables selected to represent the plasma density and the variability of this plasma. These were all taken from the Swarm level 2 data product IPDxIRR_2F.
| Dependent variable | Description | Units |
|---|---|---|
| |Grad_Ne@100km| | The electron density gradient in a running window calculated via linear regression over 27 data points for the 2 Hz electron density data. | cm−3 m−1 |
| |Grad_Ne@50km| | The electron density gradient in a running window calculated via linear regression over 13 data points for the 2 Hz electron density data. | cm−3 m−1 |
| |Grad_Ne@20km| | The electron density gradient in a running window calculated via linear regression over 5 data points for the 2 Hz electron density data. | cm−3 m−1 |
| IPIR_ix | The product of the rate of change density index in 10 s (RODI10s) and the standard deviation of the electron density in a running window of 10 s (A(ne)10s). | None |
| Ne | Electron density. | cm−3 |
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