Metrology of the Solar Spectral Irradiance at the Top Of Atmosphere in the Near Infrared using Ground Based Instruments. Presentation of the PYR-ILIOS campaign (Mauna Loa Observatory, June-July 2016).

David Bolsée1, Nuno Pereira2, Gaël Cessateur1, Peter Sperfeld3 and Sven Pape3, (1)BIRA-IASB, Brussels, Belgium, (2)Belgisch Instituut voor Ruimte-Aeronomie, Brussel, Belgium, (3)PTB Physikalisch-Technische Bundesanstalt, Braunschweig, Germany