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Observation planning for any NASA mission is essential for demonstrating a spacecraftrsquo;s ability to achieve goals, whether the target is Earth or any other astronomical body. As demands have grown, so has the fidelity, complexity, and precision of spacecraft observations. In addition, modern spacecraft communications bandwidth allows for the transmission of more data than ever. These increased capabilities have placed extra demands on spacecraft science observations; for example, the recent OSIRIS-REx mission regularly executed observation plans with sub-second timing for up to 300 targets each day. Although creating observation plans is usually relegated to the flight operations period of a mission, teams can benefit by considering these observation designs through early stages of mission planning as well. Exceptional collaboration between science teams and operations teams requires a complex web of cumbersome technology for sharing and integrating observation plans and their resulting data. This significant complexity hinders the ability of responsible parties to make informed, sensible, and rapid decisions. Spaceline solves this problem with an application that every party involved can access. Additionally, Spacelinersquo;s flexible access allows users of both browser-based GUI or WebAPI to work with Spaceline directly or link Spaceline to their own tools, maintaining a known provenance for every kernel.nbsp;Spaceline is a server- and web-based application developed under two in-progress NASA SBIR Phase II contracts. The Spaceline application consists of three core capabilities: SPICE kernel management, 3D interactive display of a scene, and simulation of science data for any onboard instrument for a given instant in time. We propose to extend the core functionality of Spaceline from supporting only pre-compiled observation plans (in the form of uploaded CKs) to allowing users to create observation plans directly within Spaceline.