LYRA, solar uv radiometer on the technology demonstration platform PROBA-2 - Stockman, Y; Hochedez, J.-F; Schmutz, W; BenMoussa, A; Defise, J.-M; Denis, F; D'Olieslaeger, M; Dominique, M; Haenen, K; Halain, J.-P; Koller, S; Koizumi, S; et al. (SPIE, 2017)