Satellite observations of the SR and TLEs (CSES)

The Schumann resonance and its link to TLEs can be observed not only from the ground, but also from orbit. The CSES (China Seismo-Electromagnetic Satellite) satellite provided the first observation of the influence of TLEs on the ionospheric Schumann resonance. Qiu 2024

According to Qiu et al. (2024), during a TLE the signal-to-noise ratio decreased for the first mode (~6.5 Hz) and the second mode (~13 Hz) of the Schumann resonance, while at the same time the spectral density increased in the ELF band. In other words, the transient disturbance associated with the luminous phenomenon manifested itself in such a way that the clearly separated resonance peaks "drowned" in the elevated broadband ELF signal. Qiu 2024

Satellite measurement has a different geometry compared with ground-based measurement: the receiver is located above the lower boundary of the ionosphere, so it registers the SR and its disturbances from a perspective that ground stations do not have. These observations complement the ground-based detection of Q-bursts (see #67) and help to separate the global properties of the resonance from the local manifestations of individual TLEs.