Design of APRS Network using Low Cost Nanosatellite

The use of Nanosatellite to provide APRS network service is discussed. The satellite, as small as the cubesat concept, requires employment of a very simple payload whereas all the complexity is brought back to the terminals. The radio link between the terminals and the Nanosatellite will be studied. We will employ the Slotted-Aloha in the uplink, and establish a mathematical model for evaluating the performance of the system under finite number of terminals. In such a system, two appropriate measures of the performance are the throughput and the average delay; thus, we will use these measures in this paper.