These scale sizes drop rapidly with local time and are insignificant after 2000 LT.
This discrepancy results in increased levels of energy needing to be absorbed in larger scale sizes, leading to greater levels of impact damage in the larger scale sizes.
In the high-latitude ionosphere, the ionospheric irregularities are generated by different mechanisms and their spatial scale sizes varies from 1000 km (e.g., polar patches) to scale sizes ~100 s km to ~10 s cm (Keskinen and Ossakow 1983).
For deriving EPI scale sizes, we determine their correlation from the electron density recordings between two Swarm spacecrafts.
In this paper, we present a statistical study of EPI scale sizes, as derived from the Swarm constellation measurements.
Secondary plasma instabilities produce small-scale ionospheric irregularities with scale sizes as short as a few centimeters (Woodman 2009).
Previously, it has been difficult to separate spatial from temporal variations and to assign the proper scale sizes to these.
We aim to reveal the typical scale sizes of EPIs in both the meridional and zonal directions.
This result suggests that EPI structures include plasma density scale sizes less than 44 km in the zonal direction.
In this study, we analyze the scale sizes of equatorial plasma irregularities based on observations from the Swarm constellation.
