AsteRx-m3 Sx

State-of-the-art GNSS receiver with always-on high accuracy right out of the box 

This product combines the latest state-of-the-art GNSS technology with a unique approach to high-accuracy positioning. AsteRx-m3 Sx provides hassle-free always-on positioning right out of the box. No need for any additional correction service selection, subscription and maintenance. This compact OEM receiver board delivers reliable sub-decimeter accuracy with short convergence time anywhere in Europe and US. This is made possible by an integration of a PPP-RTK high-accuracy correction service into Septentrio’s latest core GNSS technology.

Key features

  • Always-on high accuracy, right out of the box
  • Uniquely easy-to-use without the need for additional service subscriptions during a five-year period
  • Short convergence time
  • Sub-decimeter PPP-RTK service is available throughout US and Europe (see coverage maps for details). PPP-RTK is the latest generation of GNSS correction services, which uniquely combines near-RTK accuracy with quick initialization times.
  • Compact light-weight design with the lowest power consumption on the market
  • Easy-to-integrate with an intuitive web app



Optimized SWaP

AsteRx-m3 Sx 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.

Top performance in challenging environments with GNSS+ technology

AsteRx-m3 Sx features Septentrio's AIM+ technology, the most advanced on-board anti-jamming technology on the market. It can suppress the widest variety of interferers, from simple continuous narrowband signals to the most complex wideband and pulsed jammers. RF interference can be caused by illegal devices called “jammers” or by neighboring electronics in tightly integrated systems. The radiofrequency (RF) spectrum can be viewed in real-time in both time and frequency domains and to help in deducing interference sources.

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

Activity in the ionosphere is a problem for GNSS signals, from loss of RTK fix to total loss of signal lock. Having honed our skills, supporting applications in the most iono-active areas on Earth,  the result is 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. 


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

Intuitive web user interface 

With your high-precision GPS reference receiver comes 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.


                          Indicative image of Septentrio Web UI


Key application markets:




Download the product datasheet below