The Sentinel-4 UVN focal plane assemblies. - Jürgen Hinger; Rüdiger Hohn; Eyk Gebhardt; Jörg Reichardt (Earth Observing Systems, 2017)

Effective Optical System Assembly Using Ultra-Precise Manufactured References. - Andreas Gebhardt; Matthias Beier; Erik Schmidt; Thomas Rendel; Ute Gawronski; Eyk Gebhardt (Int. J. Autom. Technol., 2020)