The source is a product description for the Trimble R580 GNSS system, a device that provides accurate positioning data for surveying and other applications. The R580 features the Trimble ProPoint GNSS engine, which enhances performance in challenging environments like urban areas and near trees and buildings. It also boasts advanced technologies for mitigating multipath errors and resisting anti-spoofing attempts. The source further details the system's key specifications, including its accuracy, ruggedness, and platform compatibility, and highlights its integration with Trimble's other software and hardware solutions for a complete surveying workflow.