Using Van Allen Probes and Arase Observations to Develop an Empirical Plasma Density Model in the Inner Zone

Abstract A new empirical density model is developed for the inner zone between 1 < L 3 using plasma densities inferred from upper hybrid resonance on Arase, and hiss‐inferred values Van Allen Probes. The Probes are first recalibrated validated against Arase observations, both a conjunction event statistical analyses. newly includes dependencies , magnetic latitude, local time (MLT). Between 1.5 3.0, equatorial variation with shown to be equivalent that of Ozhogin et al. (2012, https://doi.org/10.1029/2011JA017330 ) model. However, 1.5, this dependence changes as increases at faster rate decreasing L. latitudinal present flatter profile than previous models, meaning lower extend higher latitudes. This well‐modeled by updated fitting coefficients. clear MLT identified, which was not found or included in some models. consistent diurnal ionosphere, peaking near = 14 becoming larger amplitude function describing presented. Overall, MLT‐dependent can provide areas outside validity region many making it useful resource accurately determining diffusion coefficients predicting electron dynamics their lifetimes radiation belt.