We present high resolution measurements of trace species (e.g.: O3, H2O, HNO3, PAN, C2H6, HCOOH, NH3, solid ammonium nitrate) in the Upper Troposphere and Lowermost Stratosphere (UTLS) from the Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) during the PHILEAS campaign with bases in Oberpfaffenhofen, Germany and Anchorage, Alaska, USA, on board the high altitude research aircraft HALO 2023.