Fengtu® GNSS Receivers: Principles and Applications in High-Precision Displacement Monitoring

Global Navigation Satellite System (GNSS) is an autonomous, worldwide space-based positioning system. These systems continuously broadcast radio navigation signals to the ground through satellite constellations, providing users with positioning, navigation, and timing services.

01 GNSS Technical Principles

GNSS positioning is based on the principle of trilateration: the receiver calculates its distance from the satellites by measuring the signal transmission time from multiple satellites. To determine the user's three-dimensional position and clock offset, signals from at least four satellites must be received simultaneously.

GNSS signals consist of three basic components: navigation data, pseudorandom noise (PRN) code, and radio frequency carrier. The receiver uses these signals to measure pseudorange and achieves higher-precision positioning through carrier phase measurements.

The main error sources affecting GNSS accuracy include:

Satellite-related errors: clock bias and orbital errors

Atmospheric delays: ionospheric and tropospheric delay effects on signals

Receiver errors: internal clock bias and hardware defects

Through differential positioning techniques such as Real-Time Kinematic (RTK), these errors can be significantly eliminated, improving positioning accuracy from the meter level to the centimeter or even millimeter level.

02 Features and Applications of Fengtu® GNSS Receivers

Fengtu® GNSS Receivers are highly integrated, all-in-one devices that combine a GNSS module, sensor module, and wireless transmission module. The device supports multi-system, multi-frequency signal reception, including the four major global navigation systems: BeiDou, GPS, GLONASS, and Galileo.

Technical Parameters:

Static accuracy: horizontal ±2.5mm ±1ppm, vertical ±5mm ±1ppm

Designed with a choke ring antenna to effectively suppress multipath effects

Power consumption below 2W, suitable for long-term field monitoring

Supports multiple communication methods: 4G/NB-IoT, LORA radio, etc.

Built-in tilt sensor to detect the tilt state of the carrier

Application Areas:

Fengtu® GNSS Receivers are specifically designed for geological hazard monitoring and are widely used in displacement monitoring for field landslides, collapses, mining-related geological hazards, reservoir dams, and highway slopes. The device can accurately monitor minute displacement changes of target objects in complex environments, providing strong support for engineering safety.

With its high-precision positioning technology and real-time data transmission capabilities, the receiver achieves millimeter-level displacement monitoring, offering users reliable safety warnings and data analysis support.