In 1972 the group started to measure the sodium in the upper
mesosphere-lower thermosphere. These activities continue until now and
additionally temperature and density measurements in the stratosphere
and mesosphere by the Rayleigh scattering started in 1993 and also
measurements of the atmospheric temperature from 80-to-100 km by the sodium
Doppler technique.
The group also develops research with rocket-borne instruments and
beginning in 1999 started research on the dynamics of the upper
mesosphere with a meteor radar.
