Publication Date:
2020-12-03
Description:
The global positioning system (GPS) phase scintillation caused by highlatitude
ionospheric irregularities during an intense high-speed stream (HSS) of the solar wind from April 29 to May 5, 2011, was observed using arrays of GPS ionospheric scintillation and total electron content monitors in the Arctic and Antarctica. The one-minute phase-scintillation index derived from the data sampled at 50 Hz was complemented by a proxy index (delta phase rate) obtained from 1-Hz GPS data. The scintillation occurrence coincided with the aurora borealis and aurora australis
observed by an all-sky imager at the South Pole, and by special sensor ultraviolet scanning imagers on board satellites of the Defense Meteorological Satellites Program. The South Pole (SP) station is approximately
conjugate with two Canadian High Arctic Ionospheric Network stations on Baffin Island, Canada, which provided the opportunity to study magnetic conjugacy of scintillation with support of riometers and
magnetometers. The GPS ionospheric pierce points were mapped at their actual or conjugate locations, along with the auroral emission over the South Pole, assuming an altitude of 120 km. As the aurora brightened
and/or drifted across the field of view of the all-sky imager, sequences of
scintillation events were observed that indicated conjugate auroras as a
locator of simultaneous or delayed bipolar scintillation events. In spite of the greater scintillation intensity in the auroral oval, where phase scintillation
sometimes exceeded 1 radian during the auroral break-up and substorms, the percentage occurrence of moderate scintillation was highest in the cusp. Interhemispheric comparisons of bipolar scintillation maps show that the scintillation occurrence is significantly higher in the southern cusp and polar cap.
Description:
Published
Description:
R0216
Description:
1.7. Osservazioni di alta e media atmosfera
Description:
3.9. Fisica della magnetosfera, ionosfera e meteorologia spaziale
Description:
JCR Journal
Description:
open
Keywords:
Scintillations
;
Solar-terrestrial interaction
;
Space weather
;
Solar variability and solar wind
;
Magnetic storms
;
01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneous
;
01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation
;
01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques
;
01. Atmosphere::01.02. Ionosphere::01.02.07. Scintillations
;
05. General::05.07. Space and Planetary sciences::05.07.02. Space weather
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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