A Virtual Reference Station (VRS) is a simulated GNSS reference point designed to enhance real-time positioning accuracy. By leveraging data from a network of continuously operating reference stations (CORS), VRS creates a localized correction signal, reducing spatial errors and improving RTK (Real-Time Kinematic) precision. This allows users to achieve centimeter-level accuracy as if a reference station were positioned at their exact location.
GNSS technology has revolutionized surveying, mapping, and geospatial data collection, offering fast and highly precise positioning. However, challenges such as atmospheric interference, signal obstructions, and the need for dedicated base stations can limit accuracy and efficiency. VRS eliminates these obstacles by providing seamless correction data without requiring physical infrastructure at the survey site.
By utilizing VRS, professionals in land surveying, construction, UAV mapping, and autonomous navigation can benefit from enhanced accuracy, streamlined workflows, and increased productivity—even in complex environments like urban landscapes or remote areas.
How does VRS work?
A Virtual Reference Station (VRS) improves GNSS accuracy by generating a customized correction signal for a user’s specific location. We prepared a list step-by-step process of VRS Operation:
- Network data collection: multiple reference stations continuously receive satellite signals and monitor errors.
- Correction generation: a central server processes this data to calculate correction factors for a specific location.
- User connection: the GNSS rover (e.g., in a surveyor’s equipment, UAV, or autonomous vehicle) connects to the VRS network via the internet or a mobile data link.
- Enhanced positioning: the system generates a virtual reference station near the user, providing real-time corrections as if a physical base station were present at that location.
Benefits of VRS
VRS offers numerous advantages across various industries, including surveying, mapping, UAV navigation, and autonomous systems such as:
- Eliminates the need for a physical base station: Reduces setup time and costs.
- Improves accuracy: corrects GNSS errors caused by atmospheric disturbances, satellite orbit errors, and clock drifts.
- Expands coverage: Works across larger areas compared to single-base RTK setups.
- Enhances efficiency: Ideal for applications like land surveying, precision agriculture, UAV mapping, and autonomous vehicle navigation.
By leveraging VRS technology, users can achieve highly precise positioning in real time without the logistical challenges of traditional GNSS base stations. Take a look to some of this applications:
