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TitrePolarization characteristics inferred from the radio receiver instrument on the enhanced Polar Outflow Probe
AuteurDanskin, D W; Hussey, G C; Gillies, R G; James, H G; Fairbairn, D T; Yau, A W
SourceJournal of Geophysical Research, Space Physics vol. 123, issue 2, 2018 p. 1648-1662, https://doi.org/10.1002/2017JA024731
Année2018
Séries alt.Ressources naturelles Canada, Contribution externe 20180079
ÉditeurWiley
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1002/2017JA024731
Mediapapier; en ligne; numérique
Formatspdf; html
ProvinceOntario; Québec
SNRC30; 31; 32; 33; 40; 41; 42; 43
Lat/Long OENS -84.0000 -72.0000 56.0000 36.0000
Sujetsionosphère; satellites; modèles; géomagnétisme; champs géomagnétiques; géologie extraterrestre; géophysique
Illustrationslocation maps; tables; spectrograms; time series; models; plots
ProgrammeNord du Canada, risque géoscience, Géoscience pour la sécurité publique
Diffusé2018 02 26
Résumé(disponible en anglais seulement)
The Radio Receiver Instrument (RRI) on the CAScade, Smallsat, and Ionospheric Polar Explorer/enhanced Polar Outflow Probe (CASSIOPE/e-POP) satellite was used to receive continuous wave and binary phase shift keyed transmissions from a high-frequency transmitter located in Ottawa, ON, Canada during April 2016 to investigate how the ionosphere affects the polarization characteristics of transionospheric high-frequency radio waves. The spacecraft orientation was continuously slewed to maintain the dipole orientation in a plane perpendicular to the direction toward the transmitter, enabling the first in situ planar polarization determination for continuous wave and binary phase shift keyed modulated radio waves from space at times when the wave frequency is at least 1.58 times the plasma frequency. The Stokes parameters and polarization characteristics were derived from the measured data and interpreted using an existing ray tracing model. For the southern part of the passes, the power was observed to oscillate between the two dipoles of RRI, which was attributed to Faraday rotation of the radio waves. For the first time, a reversal in the rate of change of orientation angle was observed where the minimum in modeled Faraday rotation occurred. The reversal point was poleward of the point of closest approach between the satellite and transmitter; this was explained by the variations of total electron content and component of magnetic field along the direction of propagation. The received signals show both quasi-longitudinal (QL) and quasi-transverse characteristics. South of the transmitter the QL regime is dominant. Around the reversal point, a combination of QL and quasi-transverse nature was observed.
Résumé(Résumé en langage clair et simple, non publié)
Les ondes radio émises par un émetteur au sol sont reçues par le satellite CASSIOPE via le récepteur radio (RRI) installé sur la Sonde perfectionnée de mesure de l'écoulement du plasma dans le vent polaire (e-POP). Les caractéristiques des ondes radio reçues dans la bande des ondes décamétriques (HF) sont modifiées en raison de la nature dispersive de la diffusion de la densité des électrons dans l'ionosphère. La rotation de Faraday est très perceptible dans les transmissions reçues lors des survols au sud.
GEOSCAN ID308289