Concepts for low-cost ground stations can be very different, depending on the needs and the budget. Variations from very simple to very complex are possible. The problem is to find the "right" composition of the components, which fulfills the basic function and fits best to the relevant criteria’s. One way to keep the cost low consists in reducing the antenna size by limiting of the range of reception.
The concept of the EGS is based on an analysis, which takes the following criteria into account.
Each of the above criteria has been weighted according to its importance. A number of alternative systems has then been compared to each other, based on the weighted criteria and their costs.
The resulting system is described in the following chapters.