Variability In Martian Co As Observed By Nomad-So From First Year Of Tgo Operation. Ashimananda Modak, (Ashim@Iaa.Es), M. A. LóPez-Valverde, A. Brines, A. Stolzenbach, B. Funke, F. GonzáLez-Galindo, Instituto De Astrofı́Sica De Andalucia, Granada, Spain, S. Aoki, Belgian Royal Institute For Space Aeronomy, Brussels, Belgium, Japan Aerospace Exploration Agency (Jaxa), Japan, I. Thomas, Belgian Royal Institute For Space Aeronomy, Brussels, Belgium, G. Liuzzi, Nasa Goddard Space Flight Center, Usa, G. Villanueva, Nasa Goddard Space Flight Center, Usa, J. Erwin, Belgian Royal Institute For Space Aeronomy, Brussels, Belgium, J. J. Lopez-Moreno, Instituto De Astrofı́Sica De Andalucia, Granada, Spain, N. Yoshida, Graduate School Of Science, Tohoku University, Sendai, Japan, U. Grabowski, Karlsruhe Institute Of Technology, Institute Of Meteorology And Climate Research, Karlsruhe, Germany, F. Forget, Laboratoire De MéTéOrologie Dynamique, Ipsl, Paris, France, F. Daerden, Belgian Royal Institute For Space Aeronomy, Brussels, Belgium, B. Ristic, Belgian Royal Institute For Space Aeronomy, Brussels, Belgium, G. Bellucci, Institute For Space Astrophysics And Planetology, Italy, M. Patel, Open University, Milton Keynes, Uk, L. Trompet, Belgian Royal Institute For Space Aeronomy, Brussels, Belgium, A.C. Vandaele, Belgian Royal Institute For Space Aeronomy, Brussels, Belgium. Introduction Data Processing And Retrieval Mars’ Atmosphere Is Primarily A Co2 Atmosphere With