Table 1 Kannuslehto campaigns used in the present study
From: Ground-based VLF wave intensity variations investigated by the principal component analysis
Campaign | From | To | # days with full measurements |
|---|---|---|---|
1 | 7 October 2016 | 25 April 2017 | 174 |
2a | 1 September 2017 | 18 October 2017 | 44 |
2b | 9 November 2017 | 26 April 2018 | 150 |
3 | 29 August 2018 | 25 April 2019 | 232 |
4 | 4 September 2019 | 24 April 2020 | 225 |