This course focuses on software-based simulation relating to current era space and ground operations industry toolkits. The course has four components: basic concepts, use of the STK toolkit and other network simulation tools such as OPNET, evaluation of a COTS system, and student presentations and papers. The initial lectures will cover both the basics of per-component computational modeling as well as end-to-end concerns mission and information assurance requirements for real-world full scale systems. There will be additional focus on a risk based approach to securing such communications systems based on confidentiality, integrity and availability of data. Students will then work with the Satellite Tool Kit (STK) (and other network simulation tools) to model a single discrete space asset or a multi-component ground communications system, including preparation for the STK Certification Exam. The student will then model their own scenario using mission modeling software. Finally, each student will present their specific scenario to the class, including critical analysis (report) of advantages and deficiencies in the tool of choice in terms of end-to-end systems engineering to include information and mission assurance concerns. Offered Spring semester only. (3)