A new extensive air shower (EAS) experiment has been installed at the
site of the Forschungszentrum Karlsruhe. The main aim of the KASCADE [
1] project is the determination of the chemical composition in the ene
rgy range around the knee of the primary cosmic ray spectrum. The main
advantage of the new installation is the simultaneous measurement of
a large number of observables for each individual event. This is achie
ved by the combination of various advanced detection techniques for th
e electromagnetic, the muonic, and the hadronic component of the exten
sive air showers. Data taking with a large part of the experiment has
started at the end of 1995. The estimated accuracy of air shower data
is discussed for the various detector components of KASCADE and first
preliminary results are presented.