Designing and Testing an IoT Low-Cost PPP-RTK Augmented GNSS Location Device.

Area of Science:

• Geomatics Engineering
• Satellite Navigation Systems
• Internet of Things

Background:

• Advancements in multi-constellation, multi-frequency Global Navigation Satellite System (GNSS) receivers enable precise positioning.
• Existing techniques like Network Real Time Kinematic (RTK) and Precise Point Positioning (PPP) have limitations for large-scale or kinematic applications.
• There is a need for real-time, low-cost, and accurate positioning solutions for emerging applications.

Purpose of the Study:

• To develop and evaluate a low-cost Internet of Things (IoT) GNSS device for real-time kinematic positioning.
• To achieve decimeter-level horizontal and vertical accuracy in urban environments.
• To ensure solution availability and provide connectivity for IoT network integration.

Main Methods:

• Development of an IoT GNSS device utilizing low-cost hardware.
• Integration with a commercial Precise Point Positioning-Real Time Kinematic (PPP-RTK) correction service delivered via IP.
• Conducting vehicle-borne kinematic tests in urban settings to assess performance.

Main Results:

• The developed IoT GNSS device achieved decimeter-level accuracy for both horizontal and vertical positioning.
• The device demonstrated the targeted solution availability during kinematic tests.
• The integrated IoT ports proved feasible for transmitting position solutions over an internet connection.

Conclusions:

• The low-cost IoT GNSS device successfully meets the requirements for real-time, decimeter-level accurate positioning in urban kinematic scenarios.
• The device's design facilitates integration into IoT networks, enabling widespread data collection and application.
• The hybrid PPP-RTK approach offers a viable solution for cost-effective, high-accuracy GNSS applications.