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FIGURE 3.1 JSpOC data flow showing tracking data inputs and data product outputs. Solid lines indicate automated data handling, and dashed lines indicate the need for some level of manual intervention. SOURCE: Based on material in JSpOC presentations to the committee.

Realizing the limitations of the SPADOC systems, AFSPC is currently developing a new, more flexible system called the JSpOC Mission System (JMS). It is being developed with an open, service-oriented architecture on commodity hardware using network-centric interfaces. The development time of such modern systems is potentially greatly reduced compared to the traditional acquisition approach, with the added advantage of providing a more flexible and extensible system. In particular, the commodity hardware with multiple node server design allows easy scaling of computational capabilities as the space catalog grows, and new algorithms can be much more easily implemented.

Finding: The Air Force recognizes that any new system architecture must be scalable in both hardware and software in order to meet the increasing demands imposed by catalog growth and new mission responsibilities.

JMS is intended not only to improve the hardware architecture supporting space situational awareness, but also to modernize the software architecture and enhance the accuracy of the products generated on a routine basis. The suite of standardized algorithms and software for the catalog maintenance aspect of space situational awareness has been maintained by A9, the Analysis Directorate of AFSPC. A9 has been the conduit for providing and maintaining the standardized astrodynamics algorithms to the external user community. However, AFSPC/A9 has not been adequately funded to maintain and upgrade the standardized software and to develop documentation. Further, it has not been possible for A9 to easily insert newer technology into the existing hardware, software, or processing system because of complications associated with maintaining compatibility with the external user community.

This conundrum is borne out by the fact that the SPADOC workhorse analytical orbit propagation software, Simplified General Perturbations 4 (SGP4), and the SPADOC numerical Special Perturbations algorithm have not



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