What Is the GD350 UAV Magnetic Survey System?

If you work in geophysics, mining, or utility detection, you know how important accurate magnetic surveys are. 

Unlike traditional ground surveys (which are slow and labor-intensive), this system attaches to a DJI M300 RTK drone, letting you cover large areas quickly while collecting high-resolution magnetic data.

How Does It Work?

The system uses two advanced sensors:

1. Miniature Rubidium Optical Pump Magnetometer (OPM) – Measures the Earth’s total magnetic field with extreme sensitivity (20 pT/Hz).

2. 3-Axis Fluxgate Magnetometer – Detects magnetic field direction (X, Y, Z axes) with minimal noise (<20 pT/√Hz).

These sensors are mounted on a carbon fiber pole, keeping them 1.5 meters away from the drone’s electronics to avoid interference.

The Data Acquisition Module (DAQ) processes readings in real time, correcting for drone-induced magnetic noise, and sends data wirelessly (10Hz update rate) to a ground station.

Key Benefits for Professionals

✔ Lightweight & Portable (1.5 kg) – Easy to carry and install on a DJI M300 RTK.
✔ High-Accuracy Sensors – Detects even tiny magnetic anomalies for precise mapping.
✔ Real-Time Data Correction – Removes errors caused by the drone’s motors and electronics.
✔ Terrain-Following Flight Planning – Adjusts altitude automatically using DEM data for consistent results.
✔ Long Flight Time (55 min) – Survey large areas in one go without frequent landings.

Who Can Use This System?

• Mining Companies – Find mineral deposits faster and cheaper.

• Archaeologists – Locate buried relics without excavation.

• Utility Inspectors – Detect underground pipes and cables safely.

• Researchers – Study geomagnetic changes with high-resolution data.

Technical Breakdown

 OPM Magnetometer

• Measures: 1,000–100,000 nT

• Works in: -30°C to +60°C (no calibration needed)

• Extremely Low Power: Only 2W during operation

 Fluxgate Magnetometer

• Measures 3D magnetic fields

• Noise Level: <20 pT/√Hz (after 15-min warm-up)

• Compact & Light: 70g sensor weight

 Data Acquisition Module (DAQ)

• 4-Core ARM Processor – Handles real-time calculations.

• 24-bit ADC – Ensures high-resolution data logging.

• USB & Wireless Output – Flexible data storage options.

 Compatible with DJI M300 RTK

• Max Speed: 23 m/s (in Sport Mode)

• RTK GPS Accuracy: ±1.5 cm

• Wind Resistance: 8 m/s

Why This System Beats Traditional Methods

 Faster Surveys – Drones cover 10x more area per hour than ground crews.
 More Accurate – Real-time corrections eliminate drone interference.
 Cost-Effective – Reduces labor and equipment costs.
 Easy to Use – No PhD required—just attach, fly, and analyze.