Datum

The Aerium Datum is a high-precision, multi-band GNSS receiver optimized for UAVs, drones, and robotic applications requiring fast, reliable, and accurate location data. Powered by the advanced u-blox NEO-M9N chipset, it supports concurrent reception of four GNSS constellations and integrates a built-in active ceramic antenna with onboard protection and filtering for enhanced reliability in harsh environments.

General

• High-sensitivity GNSS receiver with active antenna.
• Integrated SAW and LNA filters for signal reliability.
• Compact design ideal for space-constrained applications like drones and autonomous vehicles.

Compatibility

• GNSS Receiver: u-blox NEO-M9N
• Compatible with:
  • Pixhawk and other Ardupilot/PX4-based flight controllers
  • Connects via standard JST-GH interface
• Multi-constellation GNSS support:
  • GPS, Galileo, GLONASS, BeiDou

Mechanical

• Dimensions: 40 mm × 40 mm
• Mounting holes: M3, spaced 30.5 mm × 30.5 mm (standard UAV stack spacing)
• Weight: ~12 g

Electrical

General

• Input voltage: 3.3 – 12 V
• Logic level: 3.3 V
• PPS (Pulse Per Second) output supported
• Integrated battery for fast TTFF (Time To First Fix)

Warning: Do not connect to 5 V logic level systems without proper level shifting.

Performance

Parameter	Value
Position Accuracy	~1.5 m CEP
Max Update Rate	25 Hz
Max Altitude	80,000 m
Max Velocity	500 m/s
Timepulse Accuracy	±30 ns RMS
Power Consumption	~65 mA @ 3.3 V (active)
Constellation Support	GPS, GLONASS, Galileo, BeiDou

Pinout

Main Connector

• Connector Definition

  Type	Part Number	Part Name
  Board Connector	SM08B-GHS-TB	JST-GH
  Cable Connector	GHR-08V-S	JST-GH

  Pin	Name	Description
  1	VCC	5 V input
  2	RX	UART receive (3.3 V logic)
  3	TX	UART transmit (3.3 V logic)
  4	SCL	I²C clock (3.3 V logic)
  5	SDA	I²C data (3.3 V logic)
  6	PPS	Pulse-per-second output (3.3 V logic)
  7	INT	Interrupt / Data Ready (3.3 V logic)
  8	GND	Ground

USB Connector

• Connector Definition

  Type	Part Number	Part Name
  Board Connector	SM04B-GHS-TB	JST-GH
  Cable Connector	GHR-04V-S	JST-GH

  Pin	Name	Description
  1	VBUS	5 V power input
  2	D-	USB data minus
  3	D+	USB data plus
  4	GND	Ground

Software

Configuration Steps

• Default protocol: UBX over UART
• Configurable using u-blox u-center software
• Adjust:
  • Baud rate
  • Output frequency
  • GNSS constellation selection
  • Message types (NMEA / UBX)
  • Spoofing/jamming protection

Integration Steps

1. Connect VCC (3.3 – 12 V) and GND to your power source.
2. Connect UART or I²C lines to your flight controller or embedded system.
3. Mount securely to UAV frame using M3 bolts and spacers.
4. Configure the module with u-center or compatible software if needed.