WitMotion WTGPS-300P Sub-Meter INS GPS-IMU Module, Multi-GNSS (GPS/BDS/GLONASS/Galileo), Type-C, IPX Antenna, RTCM2.3

Overview

WTGPS-300P is a compact inertial-navigation GPS-IMU that fuses a high-sensitivity GNSS receiver with a 6-axis sensor and adaptive Kalman filtering to deliver sub-meter navigation and robust dead-reckoning. It supports multi-constellation reception (GPS/BeiDou-BDS/GLONASS/Galileo + SBAS), vehicle-grade UDR/ADR (GPS+INS+SPEED), and remains accurate in tunnels, garages, tree-lined streets, viaducts, and urban canyons. The board provides USB Type-C for easy PC connection and a reserved serial (UART) header with PPS, plus an IPX (IPEX/u.FL) connector for external active antennas. A super-capacitor buffers data for ~60 s after power-off.

Key Features

• Sub-meter navigation; supports RTCM 2.3 protocol.

• INS/UDR/ADR fusion with adaptive Kalman filter; velocity filtering and erroneous-GNSS rejection.

• Multi-GNSS, 135-channel reception: GPS, BDS/BeiDou, GLONASS, Galileo; SBAS (WAAS/EGNOS/MSAS/GAGAN).

• Ultra-low-noise GPS-IMU with 3D position, 3D velocity, and 3D attitude (pitch/roll/heading).

• Type-C plug-and-play; UART + PPS reserved header for integration.

• IPX antenna port; supports external 27 dB high-gain magnetic active antenna or ceramic antenna.

• Antenna detection & protection (front SAW, external LNA); built-in detection circuit.

• 60 s data hold via super-capacitor after power-off.

• No mounting-angle restriction; easy installation for all vehicle types.

GNSS & INS Performance

• Signal reception: GPS L1/L5; BD/BDS B1/B2; GLONASS L1/L2; Galileo E1/E5; QZSS/SBAS.

• SBAS: WAAS, EGNOS, MSAS, GAGAN.

• TTFF: Cold 35 s • Normal 3 s • Hot 1 s • Auxiliary 5 s.

• Sensitivity: Tracking −163 dBm • Recapture −147 dBm • Cold start −148 dBm • Normal start −155 dBm • Hot start −165 dBm.

• INS precision: 3% CEP (UDR GPS+INS).

• Horizontal positioning: 3‰ CEP (ADR GPS+INS+SPEED); Autonomous: ~1 m.

• Timing precision / Positioning precision: SBAS 1.0 m; RMS 30 ns.

• Speed precision: 99%: 60 ns (per spec).

• Heading precision: 0.05 m/s.

Operating Limits & Environment

• Attitude operating limit: 0.3°.

• Dynamics: ≤ 4 g; Height: ≤ 50,000 m; Velocity: ≤ 500 m/s.

• Working temp: −30 ~ 85 °C; Storage: −40 ~ 125 °C.

• Installation note: Fix the module before power-on; avoid movement during power-on.

Electrical & Interfaces

• Supply / logic: 3.3 V.

• USB: Type-C for data (and convenient PC access).

• Reserved serial header: EN, GND, TX0, RXD, VCC, PPS.

• Antenna: IPX (u.FL/IPEX) external antenna interface.

Antenna Options

• External active antenna (27 dB, magnetic base): strong, omnidirectional, wide coverage.

• Ceramic antenna: rigid, integrated, long service life.

Dimensions

• Board size: 36 mm × 26 mm; mounting-hole Ø≈3 mm, 20 mm spacing (top).

• Thickness: PCB ~4 mm; max component height ~13 mm.

Software & Documentation

Development kit includes Software, Manual, Tutorial, and Datasheet for rapid integration.

Typical Applications

Bus & fleet tracking, lorry logistics, new-energy vehicles, driverless cars, robotics, marine/navigation terminals, parking/underground garages, tunnels, elevated highways, and tree-obstructed urban roads.

Installation Highlights

No special mounting attitude required; simple in-cabin installation shown (dashboard, footwell, console). Designed to work across vehicle types and challenging road conditions (bumps, sharp turns).

Details

High precision inertial navigation module with 1.5m positioning accuracy. Features INS precision of 3% CEP UDR GPS+INS and horizontal positioning of 3% CEP ADR GPS+INS+SPEED. The WTGPS-300 model by witMotion includes serial number WIT070 and ID 7202100941. Equipped with a USB-C interface, multiple electronic components, and labeled pins for connectivity. Designed for advanced navigation applications requiring reliable and accurate positioning data.

High Precision INS combines satellite and inertial navigation for accurate positioning in tunnels, garages, and viaducts. Tested in Shanghai and Shenzhen, it delivers stable, high-performance results with consistent trajectories across multiple runs.

Adaptable installation for all vehicles; GPS-300 ensures reliable positioning and satellite search, minimizing impact from sharp turns and road bumps.

Driving Behavior Analysis Algorithm uses satellite and inertial navigation data for 3D position, velocity, attitude, acceleration, and angular velocity to detect driving behaviors like rapid acceleration, sharp turns, and collisions.

WTGPS-300 ensures accurate navigation in challenging environments like tunnels, urban canyons, and underground areas by integrating satellite and inertial navigation systems, correcting errors via intelligent algorithms for reliable 3D positioning, velocity, and attitude.

High sensitivity 135 channels, supports BDS/GPS/GLONASS multi-system navigation.

WitMotion WTGPS offers powerful satellite search, low VSWR, built-in antenna detection, and strong performance. It displays real-time GPS data with satellite signal strength and status.

Antenna impedance performance graph displaying network analyzer data, VSWR of 1.6073, return loss of -12.644 dB, and Smith chart analysis across 500 to 800 MHz frequency range.

WTGPS-300 is a vehicle-mounted dead reckoning module with GNSS and 6-axis sensor for high-precision 3D positioning. Features include velocity filtering, adaptive Kalman filter, inertial navigation, error detection, antenna protection, sub-meter accuracy, and easy installation.

WitMotion WTGPS supports multi-constellation GNSS, offers 3% CEP accuracy with INS integration, operates from -30°C to 85°C, and features fast TTFF with cold, normal, and hot starts.

WitMotion WTGPS offers external and ceramic antenna options. The external antenna provides 27dB high-gain, omnidirectional coverage with a magnet mount. The ceramic antenna ensures durability, longevity, and reliable performance through its integrated design.

WitMotion WTGPS-300 offers IPX interface, Type-C, Farah capacitance, GPS-IMU, serial port. Comes with software, manual, tutorial, datasheet. Suitable for buses, lorries, EVs, robots, navigation, driverless cars.