The Aphelion Cloud Belt Phase Function At Gale Crater A.C. Innanen1, B.A. Cooper2, C.L. Campbell1, S.D. Guzewich3, J.L. Kloos4, H.M. Sapers1, J.E. Moores1. 1 Centre For Research In Earth And Space Science, York University, Toronto, Canada (Ainnanen@Yorku.Ca) 2 Noirlab, Gemini North Observatory, Hilo, Usa 3 Nasa Goddard Space Flight Center, Greenbelt, Usa 4 Department Of Astronomy, University Of Maryland, College Park, Usa Introduction: The Mars Science Laboratory Rover (Msl, Curiosity), Located In Gale Crater (4.5°S, 137.4°E) Has Observed Martian Clouds Since Its Landing In 2012 (E.G. Moores Et Al., 2015, Kloos Et Al. 2018, Cooper Et Al., 2019). Many Of These Are Water-Ice Clouds, Which Are Particularly Prominent During The Aphelion Cloud Belt (Acb) Season (Ls~50°-150°), Which Is Characterized By Increased Formation Of Water-Ice Clouds Around The Equator