Electron density fluctuations from Swarm as a proxy for ground-based scintillation data: A statistical perspective

0573971 - ÚFA 2024 RIV NL eng J - Článek v odborném periodiku
Kotova, D. - Jin, Y. - Spogli, L. - Wood, A.G. - Urbář, Jaroslav - Rawlings, J.T. - Whittaker, I.C. - Alfonsi, L. - Clausen, L.B.N. - Høeg, P. - Miloch, W. J.
Electron density fluctuations from Swarm as a proxy for ground-based scintillation data: A statistical perspective.
Advances in Space Research. Roč. 72, č. 12 (2023), s. 5399-5415. ISSN 0273-1177. E-ISSN 1879-1948
Institucionální podpora: RVO:68378289
Klíčová slova: Amplitude and phase scintillations * Ionospheric irregularities * Polar cap, cusp, auroral and equatorial regions * Space weather * Topside ionosphere * In-situ plasma density from low-earth orbit satellite
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 2.6, rok: 2022
Způsob publikování: Open access
https://www.sciencedirect.com/science/article/pii/S0273117722010742

The Swarm satellite mission has been used for numerous studies of the ionosphere. Here we use a global product, based on electron density measurements from Swarm that characterises ionospheric variability. The IPIR (Ionospheric Plasma IRregularities product) provides characteristics of plasma irregularities in terms of their amplitudes, gradients and spatial scales and assigns them to geomagnetic regions. Ionospheric irregularities and fluctuations are often the cause of errors in position, navigation, and timing (PNT) based on the Global Navigation Satellite Systems (GNSS), in which signals pass through the ionosphere. The IPIR dataset also provides an indication, in the form of a numerical value index (IPIR index), of the severity of irregularities affecting the integrity of trans-ionospheric radio signals and hence, the accuracy of GNSS positioning. We analysed datasets from Swarm A and ground-based scintillation receivers. Time intervals (when Swarm A passes over the field of view of the ground-based GPS receiver) are compared to ground-based scintillation data, collecting an azimuthal selection of the GNSS data relevant to the Swarm satellite overpass. We provide validations of the IPIR product against the ground-based measurements from 23 ground-based receivers, focusing on GPS TEC and scintillation data in low-latitude, auroral and polar regions, and in different longitudinal sectors. We have determined the median, mean, maximum and standard deviation of the parameter values for both datasets and each conjunction point. We found a weak correlation of the intensity of both phase and amplitude scintillation with the IPIR index.
Trvalý link: https://hdl.handle.net/11104/0344354