摘要: This study introduces the New Observing Strategies Testbed (NOS-T); a digital engineering environment to conduct coordinated experiments between independent and potentially geographically distributed nodes. The testbed supports bo... 展开 This study introduces the New Observing Strategies Testbed (NOS-T); a digital engineering environment to conduct coordinated experiments between independent and potentially geographically distributed nodes. The testbed supports both real-time applications and scaled-time simulations. NOS-T is built on an event-driven architecture where applications communicate via message payloads mediated by an event-broker. This allows for collaboration across organizational boundaries while maintaining autonomy and control over the flow of information. Testbed capabilities are demonstrated for an example problem exploring data downlink opportunities for two distinct ground network systems. A twenty-four hour mission is simulated for two Earth observing satellites in sun-synchronous orbits, with various iterations of traditional single arctic ground stations with fixed cost contracts versus newer commercial ground stations with on-demand cost models. Results demonstrate the capability of the commercial ground stations to maintain significant data margins throughout the mission with considerable cost-savings from the on-demand pricing. 收起