Global Positioning System (GPS) Scintillation Associated with a Polar Cap Patch [PDF]
Remote Sensing, 2021 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).
Jayachandran P. Thayyil +7 more
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Imaging of polar cap patches with a low-cost airglow camera: pilot observations in Svalbard, Norway
Earth, Planets and Space, 2019 We evaluate the capability of a low-cost all-sky imager (ASI), which has been operative in Longyearbyen (78.1° N, 15.5° E), Norway, to detect 630.0 nm airglow signatures of polar cap patches.
Keisuke Hosokawa +2 more
doaj +1 more source
A multi-diagnostic approach to understanding high-latitude plasma transport during the Halloween 2003 storm [PDF]
Annales Geophysicae, 2008 During the Halloween 2003 storm event, significant electron density enhancements at elevated F-layer altitudes were recorded by the EISCAT and ESR radars in northern Europe between 20:00 and 24:00 UT on 30 October.
P. Yin +4 more
doaj +1 more source
Solar cycle dependence of polar cap patch activity [PDF]
Radio Science, 2002 Ionospheric foF2 data from two stations, Sondrestromfjord and Qaanaq, Greenland, for 4 years corresponding to four different levels of sunspot activity (sunspot number (SSN) = 150 ± 50, 125 ± 50, 40 ± 20, and 10 ± 10) are used to study the dependence of occurrence and intensity of polar cap patches on solar cycle activity.
openaire +1 more source
Multi‐instrument, high‐resolution imaging of polar cap patch transportation [PDF]
Radio Science, 2015 AbstractTransionospheric radio signals in the high‐latitude polar cap are susceptible to degradation when encountering sharp electron density gradients associated with discrete plasma structures, or patches. Multi‐instrument measurements of polar cap patches are examined during a geomagnetic storm interval on 22 January 2012.
E. G. Thomas +10 more
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In situ measurement of a newly created polar cap patch [PDF]
Journal of Geophysical Research: Space Physics, 2010 The Investigation of Cusp Irregularities 2 sounding rocket was launched 5 December 2008 at 1035 UT. We present an overview of the associated solar wind and auroral conditions, and we look in detail at the relationship between poleward moving auroral forms (PMAFs) and the creation of polar cap patches using ground‐based optical and radar data as well as
D. A. Lorentzen +5 more
openaire +1 more source
Plasma patches inside the polar cap and auroral oval: the impact on the spaceborne GPS receiver
Journal of Space Weather and Space Climate, 2019 In this study, we focus on plasma patches with very dense plasma in the southern hemisphere during the main phase of 2015 St. Patrick’s Day storm. With in situ electron densities exceeding 1.5 × 1012 m−3 at 450–500 km altitude, the patches cause strong ...
Xiong Chao +4 more
doaj +1 more source
A modeling study of asymmetries in plasma irregularity characteristics near gradient reversals [PDF]
Annales Geophysicae, 2016 Asymmetries in plasma density irregularity generation between the leading and trailing edges of the large-scale plasma density structures in the high-latitude ionosphere are investigated.
L. J. Lamarche, R. A. Makarevich
doaj +1 more source
Coordinated Cluster, ground-based instrumentation and low-altitude satellite observations of transient poleward-moving events in the ionosphere and in the tail lobe [PDF]
Annales Geophysicae, 2001 During the interval between 8:00–9:30 on 14 January 2001, the four Cluster spacecraft were moving from the central magnetospheric lobe, through the dusk sector mantle, on their way towards intersecting the magnetopause near 15:00 MLT and 15:00 UT.
M. Lockwood +40 more
doaj +1 more source
A broadband radio study of the average profile and giant pulses from PSR B1821-24A [PDF]
, 2015 We present the results of wide-band (720-2400 MHz) study of PSR B1821-24A (J1824-2452A, M28A), an energetic millisecond pulsar visible in radio, X-rays and gamma-rays. In radio, the pulsar has a complex average profile which spans >85% of the spin period
Bilous, A. V. +3 more
core +3 more sources