Developing Analytical Chorus Wave Models Using the Data from Van Allen Probes and Arase Satellite

Chorus waves play a significant role in the dynamic evolution of energetic electrons in the inner magnetosphere. Therefore, understanding the spatial and temporal dynamics of these electrons requires global distributions of chorus waves, which in turn necessitates combining data products from multiple satellite missions to achieve sufficient spatial coverage. In this study, we use 11 years of data from both the Van Allen Probes and the Arase satellite to create a global model of the magnetic intensity of chorus waves. The agreement between the two satellite missions was assessed using observations during close conjunctions. The statistical model is based on data with good spatial coverage up to 40° magnetic latitude, across all magnetic local times (MLT), and at high L-shells, resulting in a model with excellent spatial continuity. The model is generated for both Upper-Band Chorus (UBC; 0.5 fce < f < fce) and Lower-Band Chorus (LBC; 0.05 fce< f < 0.5 fce) waves, where fce is the equatorial electron gyrofrequency. These models are parameterized by the Kp index of geomagnetic activity and expressed as functions of L-shell, magnetic latitude (λ), and MLT. Our model is well suited for inclusion in quasi-linear diffusion calculations of electron scattering rates and particle simulations in the inner magnetosphere.