Technical design and commissioning of a sensor net for fine-meshed measuring of the magnetic field at the KATRIN spectrometer. (28th August 2018) - Letnev, J.; Hazenbiller, W.; Osipowicz, A.; Beglarian, A.; Bouquet, H.; Drexlin, G.; Glück, F.; Garbe, J.; Hillmer, H.; Marte, P.; Thümmler, T.; Weinheimer, Ch.