TY - JOUR
T1 - Global Positioning System (GPS) scintillation associated with a polar cap patch
AU - Jayachandran, P. Thayyil
AU - McCaffrey, Anthony M.
AU - Wang, Yong
AU - Themens, David
AU - Reid, Benjamin
AU - Zhang, Qinghe
AU - Xing , Zanyang
A2 - Watson, Christopher J
PY - 2021/5/13
Y1 - 2021/5/13
N2 - A Global Positioning System (GPS) network in the polar cap, along with ionosonde and SuperDARN radar measurements, are used to study GPS signal amplitude and phase scintillation associated with a polar cap patch. The patch was formed due to a north-to-south transition of the interplanetary magnetic field (IMF Bz). The patch moved antisunward with an average speed of ~600 m/s and lasted for ~2 h. Significant scintillation occurred on the leading edge of the patch, with smaller bursts of scintillation inside and on the trailing edge. As the patch moved, it maintained the integrity of the scintillation, producing irregularities (Fresnel scale) on the leading edge. There were no convection shears or changes in the direction of convection during scintillation events. Observations suggest that scintillation-producing Fresnel scale structures are generated through the non-linear evolution of the gradient drift instability mechanism.
AB - A Global Positioning System (GPS) network in the polar cap, along with ionosonde and SuperDARN radar measurements, are used to study GPS signal amplitude and phase scintillation associated with a polar cap patch. The patch was formed due to a north-to-south transition of the interplanetary magnetic field (IMF Bz). The patch moved antisunward with an average speed of ~600 m/s and lasted for ~2 h. Significant scintillation occurred on the leading edge of the patch, with smaller bursts of scintillation inside and on the trailing edge. As the patch moved, it maintained the integrity of the scintillation, producing irregularities (Fresnel scale) on the leading edge. There were no convection shears or changes in the direction of convection during scintillation events. Observations suggest that scintillation-producing Fresnel scale structures are generated through the non-linear evolution of the gradient drift instability mechanism.
KW - GNSS technology
KW - ionospheric scintillation
KW - plasma irregularities
KW - polar cap ionosphere
KW - solar-terrestrial interaction
UR - http://www.scopus.com/inward/record.url?scp=85106576643&partnerID=8YFLogxK
U2 - 10.3390/rs13101915
DO - 10.3390/rs13101915
M3 - Article
SN - 2072-4292
VL - 13
JO - Remote Sensing
JF - Remote Sensing
IS - 10
M1 - 1915
ER -