Today, more than ever, the need to observe our planet has become an essential part of our daily activity. The earth is frequently monitored, analyzed and measured by governmental agencies, defense forces and the private sector. From weather monitoring to disaster control and oil & gas exploration, earth observation data is vital to a host of applications that profoundly affect our lives. Low Earth Orbit (LEO) satellites are constantly encircling our globe, providing visible imaging, radar screening and spectral analysis of our planet. To benefit from the data captured by these satellites, a fast and reliable communication link must be established between the moving satellites and the ground station. Communication can be established only when there is a line of sight between the satellite and the ground station. For LEO satellites, this “window” typically lasts only a few minutes and it is required to get the most of it.