Ionospheric activity is forecast to build to possible G3 (strong) levels from approximately 00:00 UTC on the 31st of March 2022 for up to 3 hours, (currently these timings are subject to change). The ionosphere is expected to remain active for several hours before decreasing to G2 level. The area of impact is predicted to be poleward of 50 degrees Geomagnetic Latitude.
Increased ionospheric activity is correlated with the following factors:
The most significant effect for Precise Point Positioning (PPP) services is scintillation which is caused by small scale irregularities in the ionosphere caused by the solar activity. Scintillation occurs mainly in the evening along the geomagnetic equator. It has the effect of causing fluctuations in the amplitude and phase of the carrier phase signal introducing noise or causing loss of lock to the satellite. This results in a reduced number of usable GNSS satellites and occasionally a reduction in the L-Band communications link strength causing intermittent reception of the augmentation data.
Scintillation affects are normally seen in a period of 6 hours after sundown and are not predictable.
Although there is no way to eliminate the effects of scintillation, TERRASTAR recommend the following to help mitigate the impact of scintillation: