The Zimmerwald Observatory is the Swiss Space Geodetic Reference Observatory and part of the defining global reference network ITRF/ITRS. Space debris monitoring is one further prominent activity.  Programme: 17:30 Arrival Zimmerwald  17:45 Snack at the Sternwarte Zimmerwald sponsored by IEEE-CH and the Institue of Navigation (ION-CH)  18:45 Technical and scientific introduction Satellite Laser Ranging (SLR) by Prof. Dr. T. Schildknecht, Uni Bern 19:45 Demonstration Satellite Laser Ranging Measurement (if the weather permits). 20:30 Closure of the excursion Please consider the…