1 Aiaa - 99 - 4654 Experiments in Distributed Microsatellite Space Systems

Distributed space systems are often cited as a means of enabling vast performance increases ranging from enhanced mission capabilities to radical reductions in operations cost. To explore this concept, Stanford University and Santa Clara University have initiated development of a simple, low cost, two-satellite mission known as Emerald. Funded through the AFOSR/DARPA University Nanosatellite Program, the Emerald mission will involve several studies involving the design and operation of distributed space systems. First, “low-level” inter-satellite navigation techniques will be explored. Second, “high-level” multi-satellite health and payload operations will be demonstrated. Third, system validation will be attempted by assessing how these capabilities improve a baseline scientific investigation involving lightning-induced atmospheric phenomena. The Emerald bus design is based on a heritage Stanford University design, a 15-kilogram, modular hexagonal vehicle relying heavily on commercial off-the-shelf components. This paper will discuss the Emerald mission’s focus on distributed space system technologies as well as the design of the two spacecraft and the distributed ground segment.