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Global Navigation Satellite Systems (GNSS) have become key assets in today’s global infrastructure. Satellite systems such as GPS (U.S.),
Galileo (Europe), and GLONASS (Russia) can serve as a primary source of accurate position and velocity information, but also as a source of
precise time. GPS and GLONASS, with Galileo also on the horizon, are relied upon in many cases for safety-of-life applications. From space
vehicle launches to civil and military applications, GNSS is being employed to help users perform tasks faster, cheaper, and more accurately
than before. As the world becomes more reliant on GNSS, users and system operators must concern themselves with maintaining system integrity
throughout the user, control, and space segments.
AGI technology provides full spectrum navigation analysis covering all navigation systems with its three commercial off-the-shelf
software packages—Navigation Tool Kit (NavTK), Satellite Tool Kit (STK), and
Orbit Determination Tool Kit (ODTK). Mission designers and operators can use AGI technology to model and analyze multi-faceted
GNSS operations, including augmentation systems, interference analysis, and accuracy calculations in order to mitigate risks, reduce costs,
and schedule slips to ensure mission success.
STK analysis can be exported for visualization in Google Earth, Microsoft Virtual Earth, and other virtual globes.
Click here to visualize regional position
navigation accuracy coverage in Google Earth.
Note: must have Google Earth installed
By integrating a physics-based whole-Earth geometrical analysis engine; communication system modeling and GPS satellite position and propagation;
and an accurate 3-D modeling and simulation environment, AGI technology performs analysis based on modeling antenna and receivers; interference and
jamming; and constraints based on terrain, body masking, weather, and platform attitude. This permits:
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Receiver engineering
- Analyze tracking loops, filters, and processing techniques
- Investigate environmental effects on these parameters (urban canyon, foliage, ionosphere, and jamming)
- Support GNSS augmentation systems
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Control segment engineering
- Analyze the uplink power/locations, antennas, cross-links, and sub-constellations/coverage
- Investigate environmental effects on these parameters (scheduling, accesses, and jamming)
- Provide situational awareness of all systems in an interactive COP environment
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Mission planning
- Obtain situational awareness of navigation performance in theater
- Assess future navigation performance in threatened environments
- Assess platform performance (TLE, CEP, etc.) of primary and secondary systems
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Satellite engineering
- Analyze signal types and powers, group delay, clock accuracy, and antenna types/effects
- Investigate space environment effects on these parameters (space weather and solar events/power)
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Satellite operations
- Obtain worldwide situational awareness of SATNAV performance
- Assess effect of satellite maintenance activities on users
- Determine best course of action for flex-power/spot beam deployment
AGI offers three desktop applications with add-on modules that can be used together or separately to provide navigation analysis.
STK is part of the next generation GPS control segment and is used by the 2nd
Space Operations Squadron at Schriever Air Force Base. STK is also used by several organizations such as NASA, NSA, NRO, and NASIC to evaluate space-based tracking,
GNSS performance, and navigation warfare effects.
Products which support Navigation analysis
ODTK is the primary operational orbit determination tool for many U.S. satellite assets and is
being investigated as an improved tool for performing GNSS orbit determination.
Products which support Navigation analysis
NavTK is improving the situational awareness of navigation accuracy, performance prediction, and
anomaly resolution at the GPSOC, the JNWC, and other navigation centers.
Products which support Navigation analysis
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Desktop Applications
