SNAS is a single, universally accessible, standards-based, full-featured customer interface for performing Tracking and Data Relay Satellite System (TDRSS) planning, scheduling, and real-time service monitoring and control. It consolidates functionality of multiple legacy customer interface systems into a single system, and is the primary access system for managing TDRSS resources.
In the past, Space Network (SN) customer access to TDRSS services has been fragmented. Customers were required to maintain their equipment on restrictive, closed networks in order to access TDRSS services. The User Planning System (UPS) and SN Web Services Interface (SWSI) provided limited, isolated versions of what SNAS provides. SNAS combines the functionalities of UPS and SWSI into a single tool that fully implements both Network Control Center Data System (NCCDS) and Demand Access Service (DAS) scheduling, real-time control, and status capabilities.
SNAS implements a closed-server, open-proxy concept in which either server or proxy may accept and status customer requests. Because of the security limitations of the closed server, the closed server will periodically poll the open proxy for data and provide status to the open proxy. The proxy, which is more exposed to security threats, is simpler and able to be more robustly tested and protected from threats, while the closed server, which houses critical customer data, is protected by the more secure networking infrastructure.
This work was done by Keiji Tasaki of Goddard Space Flight Center, Rosemarna Pajerski of Fraunhofer Center for Experimental Software Engineering, and Helaleh Maghsoudlou of Honeywell Technology Solutions. GSC-16844-1