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STK Analysis on Virtual Globes

Click for larger view For engineers, virtual globes such as Google Earth offer an alternative venue for displaying and publishing geospatial content for use in situational awareness and geospatial intelligence operations. AGI technology enables high-fidelity analysis of time-dynamic assets to be created in STK and displayed in virtual globes by utilizing architecture developed with extensibility options that allow users a wide range of flexibility in sharing analysis results. By providing access to STK objects and data providers, engineers can report data that can be easily reformatted for virtual globes and other application APIs. AGI’s validated and verified technology compliments virtual globes by exporting analysis for critical mission information such as access times between mission assets, sensor footprints and fields of view, coverage calculations based on custom figures of merit, defined areas of interest, and detailed routes for land, sea, air, space, and missile assets within the operating picture.



Click for larger view STK leverages analytic modeling and simulation to create, analyze, and visualize new content based on real-world environments and constraints. Since it is highly adaptable, AGI technology can push out analysis to other platforms, such as virtual globes, providing users with the ability to display complex mission analyses that include:

  • Access Time Calculations – Access calculations tell STK users when and where mission assets can see one another; whether it is for a satellite overflight mission of a target area, a communications link analysis between a UAV, a satellite, and a ground control segment; or any other type of multi-body inter-visibility relationship that affects your mission. Access calculations can take into account complex "visibility" constraints, which include physical (terrain, body masking), geometric (range, angle, etc.), sensor field of view, weather, jamming interference, and user-defined obscuration.

  • Sensor Collection – Sensor objects in STK allow users to model conic, rectangular, SAR, and custom fields of view for asset payloads or constraints. Mission planners can use this functionality to optimize collection opportunities and perform scheduling while taking into account environmental effects such as terrain and body obscuration. Sensors in STK can be defined as fixed in axis, target pointing, and scanning, and can directly interact with access calculations to dynamically show when an object or area is within a sensor’s field of view.

  • Coverage Calculations – Coverage calculations in STK analyze an unlimited number of problems, such as how the failure of one satellite in a constellation will affect overall coverage; what areas are obstructed from satellite communications by the local terrain; where and when coverage gaps exist; and when opportunities for simultaneous data collection by multiple satellites are available. After coverage areas and assets (satellites, ground stations, etc.) are defined, coverage contours are characterized by user-selected figures of merit, which include N asset satisfaction, Dilution of Precision, and more, and are then displayed graphically.

  • Complex Routes – Users can view routes for land, air, and sea assets while visualizing missile trajectories and satellite orbits from LEO to GEO. Routes in STK can be imported from external files or created using complex propagation models, such as Aircraft Mission Modeler and the High-Fidelity Orbit Propagator for satellites.

 

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