Table 1 Summary of data selection criteria
From: A candidate secular variation model for IGRF-12 based on Swarm data and inverse geodynamo modelling
Magnetic | Data type | D st | Kp | Sun | Local times |
|---|---|---|---|---|---|
latitude Θ | |||||
Θ≤52° | scalar and vector | ≤5 nT | ≤2° | ±10° | all |
Θ≥52° | scalar | ≤5 nT | ≤2° | ±10° | 23:00–06:00 |