一 SSPARC Developing A Trade space Attributes Define Design Understand the Vector Mission Create a list of Develop System Attributes Model · Interview the Customer Calculate Create Utility Curves+ Utility Estimate Develop the design Cost vector and system model Evaluate the potential Architecture Architectures Trade Space SSPARC XTOS Tradespace Development Data Life Span Diversity of Latitude(s Time Spent at Equator Design Vector Define Utilit 吗M Power Typ Delta-V Capabi tySpace Systems, Policy, and Architecture Research Consortium 7 • Understand the Mission • Create a list of • Interview the Customer • Create Utility Curves • Develop the design model • Evaluate the potential Architectures Mission Concept Attributes Calculate Utility Develop System Model Estimate Cost Architecture Define Design Vector ©2002 Massachusetts Institute of Technology “Attributes” vector and system Trade Space Developing A Trade Space Space Systems, Policy, and Architecture Research Consortium 8 Concept • Small low-altitude science mission • Known instruments Attributes • Data Life Span • Data Collection Altitude(s) • Diversity of Latitude(s) • Time Spent at Equator • Data Latency • Number of Vehicles and Mission Design • Apogee Altitude • Perigee Altitude • Orbit Inclination • Antenna Gain • Communications Architecture • Propulsion Type • Power Type • 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 150 350 550 750 950 Data Collection Altitude (km) Utility ©2002 Massachusetts Institute of Technology XTOS Tradespace Development Design Vector Manuever Delta-V Capability Define Utility 4