Chorus observations by the Polar spacecraft near the mid-altitude cusp

Abstract

In this study we examine an example of chorus emission when the high-frequency waveform receiver on board Polar was operating allowing direction-finding and polarization measurements in the low-altitude cusp. The results reveal at least two and possibly three distinct groups of narrow-banded chorus emission with a primary source region at the magnetic equator

Keywords

• Chorus
• observations
• Polar
• spacecraft
• mid-altitude
• cusp