During 2009 and 2010 we ran experiments with a 3-meter dish antenna located near PB8. CNES, the French national center for spatial studies, asked us to monitor signal activities in the L band.
A specific source has been developed for that purpose, here installed at the focus point of the antenna:
Two geostationary satellites emitting in the L Band were targeted for this experiment:
The following picture shows the frequency response of the preamplifier: