GUIDANCE, NAVIGATION AND CONTROL REQUIREMENTS FOR FUTURE REMOTE SENSING SPACE SYSTEMS

摘要

As the role of space-based intelligence, surveillance and reconnaissance continues to grow, military users will demand higher image quality, faster delivery of image products, and improved target location accuracy in order to pinpoint locations of events of interest and for precise situational awareness. Such demands have a significant impact on the space vehicle Guidance, Navigation and Control (GNC) subsystem. GNC requirements are ultimately driven by key performance parameters (KPPs) for the overall system which include image quality, quantity, timeliness, and geolocation accuracy. Consequently, an important task in the initial phase of the system development is to convert these KPP requirements into GNC requirements and then flow down these requirements into drivers of GNC performance. We focus on a process to derive GNC requirements from KPPs for electro-optical and synthetic aperture radar remote sensing systems. Error budgets for the pointing knowledge and pointing control will be presented and the error contributors that affect the pointing control system performance will also be discussed.