Holybro H-RTK Mosaic-H Dual-Antenna RTK GPS for Drones with Septentrio Receiver & IST8310 Magnetometer – Moving Baseline Yaw & CNC Housing

Overview

The Holybro H-RTK Mosaic-H is a state-of-the-art dual-antenna RTK GNSS module built around the Septentrio mosaic-H receiver, delivering unmatched heading accuracy, robust RTK performance, and advanced anti-jamming technology. Housed in a CNC-machined aluminum enclosure, it integrates an IST8310 magnetometer and supports a full suite of connectivity and data logging features, making it ideal for UAVs, autonomous ground vehicles, marine systems, and base station setups.

Unlike conventional magnetometer-based yaw systems, the Mosaic-H utilizes dual GNSS antennas to deliver true heading (GPS Yaw / Moving Baseline Yaw) without magnetic interference, significantly improving orientation accuracy in harsh environments like near power lines or metal structures.

Key Features

• Dual-Antenna GNSS Heading
  Provides accurate yaw data (moving baseline) without relying on a compass, eliminating magnetic distortion from motors or structures.

• Septentrio GNSS Receiver – mosaic-H
  Supports multi-constellation (GPS, Galileo, GLONASS, BeiDou, QZSS, SBAS) and multi-frequency (L1, L2, E1, E5b, B1-B3) with centimeter-level RTK accuracy.

• Advanced Interference Mitigation

  • AIM+: Industry-leading protection against jamming and spoofing

  • LOCK+: Maintains signal integrity under high vibration

  • APME+: Mitigates multipath effects for higher GNSS precision

  • IONO+ / OSNMA: Enhanced protection against ionospheric and spoofing threats

• High-Precision Attitude Accuracy

  • Heading: 0.15° at 1m baseline, 0.03° at 5m

  • Pitch/Roll: 0.25° at 1m baseline, 0.05° at 5m

• Fast Fix & Low Latency

  • Cold start ≤ 45s, hot start ≤ 20s

  • Reacquisition: 1s

  • Latency: <10ms

• Comprehensive Integration

  • USB Type-C, UART1 (GH1.25 10pin), UART2 (GH1.25 6pin)

  • SMA antenna connections

  • Onboard buzzer, log button, and safety switch

• Firmware Compatible

  • ArduPilot

  • PX4 (latest versions)

Specification

• 1x H-RTK Mosaic
• 2x High Performance Antenna
• 2x Antenna Mount for H-RTK
• 2x SMA Cable(40CM)
• 2x GH 10P Cable
• 1x GH 6P Cable
• 1x GH 10P to 6P Cable
• 1x USB-C Cable

Setup Guide & Reference Links:

• Pinout 
• Dimension
• Setup & Getting Started (Ardupilot)
• Setup & Getting Started (PX4)
• Advanced Applications
• GPS LED Meaning
• Septentrio mosiac-H GNSS receivier datasheet
• Septentrio Download Page
• Septentrio PPK Application
• Septentrio RXTools (GNSS receiver control and analysis software)