Ion-scale Electromagnetic Waves in the Inner Heliosphere - Bowen,TA; Mallet,A; Huang,J; Klein,KG; Malaspina,DM; Stevens,M; Bale,SD; Bonnell,JW; Case,AW; Chandran,BDG; Chaston,CC; Chen,CHK; et al. (ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2020)