Learn More
Communication via satellite begins when the satellite is positioned in the desired orbital position. The satellite's coverage area on the Earth depends on orbital parameters. Ground stations can communicate with LEO (Low Earth Orbiting) satellites only when the satellite is in their visibility region. The duration of the visibility and so the communication(More)
In this paper we present results from a measurement campaign evaluating the web performance of different mobile Internet access technologies with and without caching. We measured in GPRS, EDGE, UMTS and HSDPA radio access networks of a mobile operator in Austria. The operator has implemented a web-proxy for performance improvement. To evaluate the impact on(More)
A satellite ground station for participation in the Canadian project MOST (Microvariability and Oscillations of Stars) has been set up and is being successfully operated since October 2003 at the Institute for Astronomy of the University of Vienna. The location of the ground station is in a densely populated region of the town. The station has been built at(More)
  • 1