What is Dual-Frequency Positioning?

2021-02-05

Location information lies at the core of modern location-based services. As more application scenarios rely on precise location data, the accuracy of positioning has become increasingly crucial.

Traditional GPS trackers determine their location through satellite radio signals. Most current market solutions rely on single-frequency GNSS, meaning they track one type of satellite signal (typically L1). While widely used, single-frequency GNSS is susceptible to multipath errors, especially in urban environments with tall buildings.

When satellite signals reflect off buildings, multipath interference can cause errors of up to 5 meters, leading to incorrect positioning—such as identifying the wrong street entirely.

Why Dual-Frequency Positioning Matters

With growing demand for high-accuracy, low-cost GNSS solutions—from autonomous vehicles to drones—dual-frequency GNSS (L1 + L5) is emerging as the preferred option.

Dual-frequency positioning combines two signals from satellites, allowing the system to eliminate ionospheric delays and reduce multipath errors. As a result, positioning accuracy and reliability are significantly improved compared to single-frequency systems.

JimiIoT L1+L5 Dual-Frequency Tracker: Coming Soon

To meet the demand for precise positioning, JimiIoT is launching a dual-frequency GPS tracker designed for vehicle tracking. This multifunctional tracker features:

L1 + L5 dual-frequency GNSS for highly accurate positioning
IP-rated housing for dust and water resistance, ideal for harsh conditions
Multiple I/Os to connect with accessories like:
- Relay
- Panic button
- Fuel sensor
- RFID reader
Real-time alerts for events such as speeding, tampering, or unauthorized movement
Seamless integration into fleet management systems for better visibility and control