Performance of the new digital radiosonde system DFM 90

The new DFM Digital Flexible Modular radiosonde system has been developed for the use in operational upper air soundings as well as in scientific applications. The radiosonde provides a standard PTU configuration and, in addition, up to 5 capacitive and 5 resistive sensors with a user selectabel configuration of additional sensors. This article describes the principles of operation and the results of a comparison with the radiosonde of the German weather service (DWD).