2025 CAP Congress / Congrès de l'ACP 2025

Session

(DASP) F1-2 Magnetosphere-Ionosphere Coupling | Couplage magnétosphère-ionosphère (DPAE)

F1-2

13 Jun 2025, 09:00

Conveners

(DASP) F1-2 Magnetosphere-Ionosphere Coupling | Couplage magnétosphère-ionosphère (DPAE)

• Ian Mann (University of Alberta)

29. Statistical studies of polarisation and propagation characteristics of Pc5 ULF waves observed by SuperDARN Radars at mid latitudes

Pasha Ponomarenko (University of Saskatchewan)

13/06/2025, 09:00

Atmospheric and Space Physics / Physique atmosphérique et spatiale (DASP/DPAE)

Oral (Non-Student) / Orale (non-étudiant(e))

The bulk of information on polarisation and propagation of ultra-low frequency (ULF, 1-1000 mHz) waves is normally obtained using ground-based magnetometer arrays. However, the ground ULF field observations may be significantly distorted by the transition of the magnetohydrodynamic wave into an electromagnetic wave at the boundary between the ionised and neutral parts of the atmosphere. These...

314. Comparison of two-stream and kinetic methods of calculation of photoelectron effects

Dmytro Sydorenko

13/06/2025, 09:15

Atmospheric and Space Physics / Physique atmosphérique et spatiale (DASP/DPAE)

Oral (Non-Student) / Orale (non-étudiant(e))

Photoelectrons are an important source of ionization and ambient electron heating in ionosphere. Primary photoelectrons are produced via ionization of neutral atoms in thermosphere by solar EUV photons. Secondary photoelectrons are produced via ionization by primary photoelectrons. There are different ways of calculation of photoelectron effects. The most accurate way is to use the kinetic...

60. Unexpected Field-Aligned Structure in Equatorial Plasma Bubbles

Bizuayehu Beyene (University of Calgary)

13/06/2025, 09:30

Atmospheric and Space Physics / Physique atmosphérique et spatiale (DASP/DPAE)

Oral (Non-Student) / Orale (non-étudiant(e))

Equatorial plasma bubbles (EPBs) are ionospheric irregularities which tend to be aligned parallel to the Earth's magnetic field. They are initated in the bottomside
of the F-region of the equatorial ionosphere by an instability
known as the Rayleigh-Taylor instability. EPBs impose effects on radio signals
and cause errors in Global Navigation Satellite Systems (GNSS) because
they alter the...

147. Validation of plasma drift velocity calculation algorithm

Dr Oleksandr Koloskov (University of New Brunswick)

13/06/2025, 09:45

Atmospheric and Space Physics / Physique atmosphérique et spatiale (DASP/DPAE)

Oral (Non-Student) / Orale (non-étudiant(e))

The paper discusses the validation of a 3D ionospheric drift velocity estimation algorithm developed by the authors. This algorithm will be integrated into the Sanimut system, which is being developed by the Radio and Space Physics Laboratory (RSPL) at the University of New Brunswick as a state-of-the-art, next-generation HF measurement platform. The system is set to replace the Canadian...

302. Electron Density Variations in the Ionosphere Over Poker Flat (Alaska)

Hayden Fast (U of Saskatchewan)

13/06/2025, 10:00

Atmospheric and Space Physics / Physique atmosphérique et spatiale (DASP/DPAE)

Oral (Non-Student) / Orale (non-étudiant(e))

We present highly-averaged data on the ionospheric electron density to illustrate solar-cycle, seasonal, and diurnal variations over Poker Flat (Alaska) for the period of 2010-2019. Considered are measurements by the PFISR incoherent scatter radar and onboard Swarm satellites (at ~ 450 and 510 km) and predictions by the e-CHAIM empirical model. We demonstrate major expected dependencies and...