The Orbit Determination Tool Kit (ODTK) - Version 5

The Orbit Determination Tool Kit (ODTK) is commercial software for geocentric spacecraft orbit determination and analysis from Analytical Graphics, Inc. Its key features include a tracking-data simulator, an optimal (Kalman-like) sequential filter, and a sequential fixed-interval smoother. Functionality includes autonomous measurement editing, customizable reporting and graphing, simultaneous multiple-satellite estimation, and modeling of time-varying system biases. ODTK Version 5 adds two significant capabilities: a broad operational capability for maintaining global navigation satellite systems such as the US Global Positioning System, and the ability to refine location estimates for poorly known emission sources using time difference-of-arrival and frequency difference-of-arrival measurements.

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