<p>Organization of training events of operators and scientists to fulfill different requirements: calibration procedures or techniques, training of new operators, support for implementing standard operating procedures, data quality control procedures. It will have a limited number (10-20) of participants and will be organized at the different CCRES units depending on the topics. NF operators are encouraged to participate regularly (once every 2 years). External users are likely to come from national weather services, possibly in the framework of the European E-PROFILE program for MWRs and DLs, and operators involved in airport traffic safety. Training is provided in the form of physical access and virtual-access training is also envisaged.</p>