Navigation - Analytical Graphics, Inc.

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	Space Superiority Geospatial Intelligence Space Exploration Aircraft & UAV Systems Navigation Comm & EW Spacecraft Mission Design Operations Range Safety C4ISR Missile Defense

Navigation

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:

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
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
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
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)
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 current GPS control segment and is 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