| Title | Polarization characteristics inferred from the radio receiver instrument on the enhanced Polar Outflow Probe |
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| Author | Danskin, D W ;
Hussey, G C; Gillies, R G; James, H G; Fairbairn, D T; Yau, A W |
| Source | Journal of Geophysical Research, Space Physics vol. 123, issue 2, 2018 p. 1648-1662, https://doi.org/10.1002/2017JA024731 |
| Image |  |
| Year | 2018 |
| Alt Series | Natural Resources Canada, Contribution Series 20180079 |
| Publisher | Wiley-Blackwell |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf; html |
| Province | Ontario; Quebec |
| NTS | 30; 31; 32; 33; 40; 41; 42; 43 |
| Area | Massachussetts; Canada; United States of America |
| Lat/Long WENS | -84.0000 -72.0000 56.0000 36.0000 |
| Subjects | extraterrestrial geology; geophysics; ionosphere; satellites; models; geomagnetism; geomagnetic fields |
| Illustrations | location maps; tables; spectrograms; time series; models; plots |
| Program | Public Safety Geoscience Northern Canada Geohazards Project |
| Released | 2018 02 26 |
| Abstract | 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. |
| Summary | (Plain Language Summary, not published)
Radio waves from a ground transmitter are received on the CASSIOPE satellite by the radio receiver instrument (RRI) on the enhanced polar outflow probe
(e-POP). The characteristics of the received radio waves of the high frequency (HF) band are changed due to the dispersive nature of the electron density distribution for the ionosphere. Faraday rotation is very noticeable in the received
transmissions for southern passes. |
| GEOSCAN ID | 308289 |
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