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Septentrio AsteRx-m3 Fg GNSS Receiver Board

The AsteRx-m3 Fg from Septentrio is a PPP Fugro Marinestar receiver offering multi-frequency GNSS and dual-antenna receiver capabilities for marine applications.



The AsteRx-m3 Fg is Septentrio’s best-in-class OEM board. It is a multi-frequency multi-constellation GNSS receiver featuring top positioning performance with flexibility to be used either as a base station or as a rover. In dual antenna mode, it provides heading & pitch or heading & roll information on top of reliable and accurate positioning. This receiver is specifically designed for marine survey and construction with RTK as well as Marinestar PPP high-accuracy positioning.

The AsteRx-m3 Fg GNSS receiver features AIM+ Advanced Interference Mitigation and Monitoring Technology, offers built-in protection against intentional and unintentional jamming and spoofing using a sophisticated system of sampling and mitigation mechanisms. In robotic devices neighboring electronics can produce RF radiation which interferes with GNSS signals. AIM+ offers protection against such interference resulting in faster set-up time and robust continuous operation.

The AsteRx-m3 Fg  provides RTK positioning at the lowest power consumption of any comparable device on the market. Its minimal SWaP (Size, Weight and Power) means longer operation on a single battery charge and better value in the field.

Mechanical vibrations or shocks can wreak havoc with satellite tracking. LOCK+ automatically adjusts the parameters of the AsteRx-m3 Pro receiver so you never lose position.

IONO+: the most advanced protection against ionospheric disturbances to GNSS signals on any receiver.

Metal and large nearby structures can reflect GNSS signals and produce multipath. The APME+ system effectively disentangles direct and reflected signals enhancing both position and measurement quality.

The AsteRx-m3 Fg GPS/GNSS receiver comes with fully documented interfaces, commands and data messages. The included GNSS receiver control and analysis software RxTools allows receiver configuration, monitoring as well as data logging and analysis.

The receiver includes an intuitive web user interface for easy operation and monitoring allowing you to control the receiver from any mobile device or computer. The web interface also uses easy-to-read quality indicators ideal to monitor the receiver operation during the job at hand.


  • Flexibility of use and easy-to-integrate
  • Best-in-class SWaP (Size, Weight and Power)
  • Best SWaP on the market (Size, Weight and Power)
  • AIM+  anti-jamming, anti-spoofing monitoring system as part of the GNSS+ Technology Suite
  • Full-constellation, triple-frequency satellite tracking
  • Sub-degree GNSS heading & pitch or heading & roll
  • High update rate with low latency
  • High-accuracy positioning at sea with Fugro Marinestar PPP corrections

Technical Specifications

GNSS Signals
GPS: L1 C/A, L1C, L2C, L2 P(Y), L5
Beidou: B1I, B1C, B2a, B2I, B2b, B3I
Galileo: E1, E5a, E5b, E5Altboc, E6
QZSS: L1 C/A, L1C/B, L2C, L5
NavIC: L5
L-band: Integrated L-band receiver
Size: 47.5 x 70 x 9.32 mm, 1.87 x 2.75 x 0.36 in
Weight: 27 g/0.952 oz
Input Voltage: 3.3 VDC ± 5%
Operating Temperature: -40°C to +85°C, -40°F to +185°F
Storage Temperature: -55°C to +85°C, -67°F to +185°F
Humidity: 5% to 95% (non-condensing)
Vibration: MIL-STD-810G


The AsteRx-m3 Fg GNSS receiver board from Septentrio is available through TerrisGPS. If you would like more information about this receiver, please contact us using the Request Pricing form.

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Client Testimonials

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"Thank you for your prompt service. All seems to be working well again. Your techs were very helpful with the troubleshooting."
J.O. - Ground Navigation
"Thanks for all the troubleshooting help, also to John for his assistance and the prompt answers from you guys!"
F.A. - Survey Industry

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