White paper: Trimble xFill correction service

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To achieve centimeter positioning with GNSS signals, Trimble® xFill® correction service provides a specialized correction stream broadcast by L-band satellite generated using Trimble real-time eXtended (RTX) technology. This white paper provides an overview of the Trimble RTX® technology as well as how Trimble xFill works.

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White Paper
Surveying & Mapping
Land Mobile Mapping
Correction Services
Precise Positioning
GNSS Positioning
© 2026 Trimble Inc.

Trimble is a global technology company that connects the physical and digital worlds, transforming the ways work gets done. With relentless innovation in precise positioning, modeling and data analytics, Trimble enables essential industries including construction, geospatial and transportation. Whether it's helping customers build and maintain infrastructure, design and construct buildings, optimize global supply chains or map the world, Trimble is at the forefront, driving productivity and progress.