Determining the Global Scale Size of Chorus Waves in the Magnetosphere

Chorus waves outside the plasmapause influence Earth's radiation belt dynamics by interacting with energetic electrons via cyclotron and Landau resonance. Recent numerical diffusion experiments indicate that process is sensitive to spatial temporal scale of variability in wave-particle interaction, which reported be more efficient than based on traditional average model. Using Van Allen Probes A B data from November 2012 July 2019, size chorus are calculated correlation between wave amplitudes detected two satellites varying separation or time lag. We found that, incoherent when extent greater 433 km lag lasts ∼10 s, significantly smaller plasmaspheric hiss. In addition, correlations tend higher near noon lower geomagnetic activity. The always statistically zero, not influenced location Our results can help refine model interactions particles belt.