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Usability/User Interface: FreeFlyer provides an easy to use Graphic User Interface (GUI) with drag and drop functionality for easy problem setup and output generation. Each run is controlled by the GUI built "Control Sequence" which allows the user to set up each simulation or operations scenario in a logically ordered and human readable form. The GUI also allows rapid access to all objects being used for the simulation as well as specifying all output types. Through the GUI, the user can build and modify spacecraft and associated hardware, ground stations, ground area targets, control boxes for station keeping and close proximity operations, and formations/constellations of spacecraft to be treated as a single object.
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Scripting language: FreeFlyer’s natural scripting language allows maximum flexibility for problem set-up, control law implementation, and product customization. Using this scripting language, users can take advantage of writing their own equations, defining their own variables for reporting and plotting, and implementing even the most complex control laws. With the scripting language, the product functionality is limited only by the user’s imagination. |
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Logic Control: All FreeFlyer functionality can be controlled via logic commands such as For, If, While, Pause, Stop, Achieve, and Vary. This flexibility allows for looping, branching, and decision-making based on any calculated parameter at every integration step. It allows parametric studies to be performed with ease in a single FreeFlyer run. Other uses include manoeuvre optimization, optimizing sensor/ground station/area target coverage, and formation/constellation design optimization. Logic control also allows spacecraft components such as sensors to be turned on and off based on orbit or object contact parameters, or events such as sun/shadow or beta angle constraints. |
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Visualization: All versions of FreeFlyer come complete with a powerful 2D and 3D visualization environment for displaying simulation or operational data in real-time. It provides an intuitive and user interactive view of all simulation objects. Features such as orbit geometry, spacecraft position and attitude, sensor projections, ground stations and their associated masks, and ground area targets are all available for viewing. Each view can be preset to user-defined viewpoints or changed real-time by interactive user panels. |
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Visibility/Access analysis: FreeFlyer has optimum flexibility when it comes to visibility and access analysis. Access data (times, angles, distances, rates) can be computed and displayed real-time for inter-visibility access between any objects (or groups of objects) contained in each simulation or operational scenario. Each access calculation can also be constrained using field-of-view constraints such as sensor obscuration or ground station masking. Revisit statistics, percent coverage (ground area or ground station), and sun/shadow times are all easily and rapidly calculated, displayed, and reported.
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Additional Features of FreeFlyer Design include:
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