This paper reviews our current understanding of auroral features that appear poleward of
the main auroral oval within the polar cap, especially those that are known as Sun-aligned …

One of the signatures of magnetospheric substorms is the precipitation of high energy
particles into the high latitude ionosphere. In this paper, we introduce a new method of …

During a magnetic storm on 14–16 December 2006, a polar cap tongue of ionization (TOI)
was detected by an all‐sky imager (ASI) at Resolute Bay, Canada (74.73° N, 265.07° E). We …

A statistics of motion of polar cap arcs is conducted by using 5 years of optical data from an
all‐sky imager at Resolute Bay, Canada (74.73° N, 265.07° E). We identified 743 arcs by …

We report an event in which a polar cap patch was detected with an all‐sky imager (ASI) at
Resolute Bay, Canada (74.73° N, 265.07° E; AACGM latitude 82.9°), on the nightside. The …

This paper presents statistical characteristics (occurrence rate, amplitude, and frequency) of
low‐frequency (< 100 mHz) variations in total electron content (TEC) observed in the polar …

A unique example of a polar cap arc producing clear amplitude and phase scintillations in
GPS L‐band signals is presented using observations from an all‐sky imager and a GPS …

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 …

We present the first complex network theory‐based analysis of high‐latitude total electron
content (TEC) data, including dependencies on interplanetary magnetic field (IMF) clock …

We present a detailed case study of the electrodynamics of a high‐latitude trough observed
at~ 12 UT (~ 1 MLT) on 8 March 2008 using multiple instruments, including incoherent …