Product Overview:

The Here 4 is a high-precision, dual-band RTK navigation module, designed for professional use. It supports multiple global navigation satellite systems (GNSS) such as BeiDou, Galileo, GLONASS, GPS, and QZSS, providing reliable centimeter-level accuracy. Utilizing advanced algorithms and multi-frequency DGNSS signals, the Here 4 achieves an RTK fix in seconds, offering exceptional precision and stability.

More than just a GNSS module, the Here 4 integrates flight control and navigation functionalities into one compact device. With 8 PWM or BDSHOT outputs, RCIN, hotshoe, and camera trigger, it offers a complete solution for both accurate mapping and precise control operations.

Key Features:

1. u-blox F9P Dual-band RTK Navigation Module: Delivers high-precision, dual-band GNSS performance.

2. Powerful Processing: Built-in STM32H7 chip ensures real-time data processing and optimization, running on the AP_Periph firmware standard used in the unmanned industry.

3. High-performance Dual-band Antenna: Tailor-made by Taoglas, supporting L1 and L5 frequencies, offering high gain, sensitivity, and stability.

4. Blue Version with Drone-ID Support: Adds compliance for Drone-ID.

5. Fast RTK Fix: Multi-frequency DGNSS signals and advanced algorithms enable quick RTK convergence, achieving stable, centimeter-level accuracy.

6. Compact & Lightweight: The module measures 16 x 68mm and weighs just 60g.

7. ProfiLED Embedded Display: Built-in LED system with multiple display modes for notifications or navigation signals, customizable via parameters or onboard Lua scripting.

8. High-Speed CAN FD Communication: Real-time data transmission with high bandwidth.

9. Built-in IMU: With future firmware updates, the Here 4 will support tightly coupled DGNSS-INS-fused positioning solutions for enhanced precision.

10. Integrated Flight Control & Navigation: The module offers more than just GNSS capabilities, with 8 PWM/BDSHOT outputs, RCIN, hotshoe, and camera trigger functionalities, making it a self-contained solution for accurate mapping and control.

11. Expandable & Customizable: The DroneCAN FD communication protocol supports fast (8Mbps) and stable transmission, and the open-source AP-Periph platform allows for further development and customization.

Specifications:

• GNSS Module: u-blox NEO-F9P
• Processor: STM32H757 dual-core
• IMU Sensor: ICM42688 + RM3100
• Barometer: MS5611
• Communication Protocol: DroneCAN, 8Mbit/s
• Receiver Type: Dual-band GNSS high-precision receiver
• GNSS Systems: GPS, GLONASS, Galileo, BeiDou, SBAS, QZSS
• Satellite Bands: B1I, B2a, E1B/C, E5a, L1C/A, L1OF, L5
• Max GNSS Systems Supported: 4
• Navigation Update Rate (RTK): Up to 20 Hz
• Positioning Accuracy: 0.01m + 1ppm CEP
• Max Speed: 500 m/s
• RTK Convergence Time: <10 seconds
• Acquisition Time: Cold start: 25s, Aided start: 2s, Hot start: 2s
• Sensitivity:
  • Tracking & Navigation: –167 dBm
  • Cold Starts: –148 dBm
  • Hot Starts: –157 dBm
  • Reacquisition: –160 dBm
• Antenna: Dual-band
• Supported Protocols: NMEA, UBX binary, RTCM 3.3, SPARTN 2.0.1
• Anti-Spoofing: Advanced anti-spoofing algorithms

The Here 4 combines robust GNSS capabilities, flight control, and navigation in a compact, high-performance module, making it ideal for precise, high-accuracy applications.