摘要: Leveraging digital threading principles is fundamental to the design of a complex 21st century system. In order to meet the Space Development Agency's (SDA) vision for a multilayer satellite constellation within its National Defen... 展开 Leveraging digital threading principles is fundamental to the design of a complex 21st century system. In order to meet the Space Development Agency's (SDA) vision for a multilayer satellite constellation within its National Defense Space Architecture (NDSA), COSMIC (Concept of Operations Simulation and Model Integration Capability) was developed as a prototyping technique to simulate a systems modeling language (SysML) model of the 126 transport layer satellite vehicles and 28 tracking layer satellite vehicles contained within Tranche 1. This Tranche 1 layer is expected to provide real-time, 24/7 launch detection, and relay pertinent information to the user. To demonstrate that Tranche 1 will meet these requirements, COSMIC utilizes digital threading techniques to satisfy critical mission threads (CMT) where Tranche 1 will be used in the future fight. The COSMIC digital testbed is a multi-software integrated approach binding Cameo Systems Modeler and third-party analytical tools, such as Systems Tool Kit (STK) and NS-3 using a Python application program interface (API) to control this third-party analytical software. COSMIC executes SysML behavior diagrams in Cameo to simulate the population of Tranche 1 satellites into STK given orbital parameters in Cameo diagrams. COSMIC model execution uses "opaque expressions," or application-layer JavaScript code embedded in the model allowing for in-the-loop data exchanges with STK. The COSMIC digital tool enables the testing of potential operational scenarios, leveraging Tranche 1 satellite vehicles to model how this multidirectional, global, and highly integrated satellite communications network can track threats in real-time and best support the warfighter. This research illustrates the value of scenario development via Cameo, STK, NS-3, JavaScript, and Python and outlines the steps taken to formalize these links using digital threading techniques. 收起