AsteRx-m3 CLAS

GNSS OEM board with PPP-RTK corrections for Japan

  • Flexibility of use and easy-to-integrate
  • Best-in-class SWaP (Size, Weight and Power)
  • Full-constellation, triple-frequency satellite tracking
  • Sub-degree GNSS heading & pitch or heading & roll
  • High update rate with low latency
  • Japan Centimeter Level Augmentation Service (CLAS) integrated
  • AIM+ unique interference monitoring and mitigation system + advanced other GNSS+ algorithms

Dual-antenna multi-frequency receiver with integrated corrections for Japan

AsteRx-m3 CLAS is Septentrio’s best-in-class versatile OEM board. It is a multi-frequency GNSS receiver featuring top positioning performance with flexibility to be used either as a base station or as a rover receiver. In dual antenna mode it provides heading & pitch or heading & roll information on top of reliable and accurate positioning. It offers the convenience of plug-and-play sub-decimeter accuracy, thanks to the integrated PPP-RTK correction service from Centimeter Level Augmentation Service (CLAS) of Japan’s Quasi-Zenith Satellite System (QZSS, aka Michibiki).

The GNSS+ Technologies - Top performance in challenging environments

Mechanical vibrations or shocks caused by rough terrain can wreak havoc with satellite tracking. LOCK+ automatically adjusts the parameters of this 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. APME+ is bias free and, in line with Septentrio’s commitment to maximum configurability, can be disabled.

Advanced Receiver Autonomous Integrity Monitoring (RAIM+) comprises fault detection mechanisms of the receiver at all the levels including the generation of measurements, quality control and navigation algorithms. Detected faulty measurements, which are typically caused by high multipath or active ionosphere, are removed from the solution.

AIM+ anti-jamming and RF spectrum monitoring system

AIM+ offers built-in protection against intentional and unintentional jamming using a sophisticated system of sampling and mitigation mechanisms. Your high-precision GNSS receiver can automatically suppress the widest variety of interferers from simple continuous narrow-band signals to the more complex wide band and pulsed transmitters as well as lnmarsat and Iridium satellite transmissions.  




Illustrative image for Septentrio AsteRx-m3 CLAS GNSS Receiver Web User Interface (WebUI)

This 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.

Septentrio patented GNSS+ technologies

AIM+ Advanced Interference Monitoring and Mitigation
More info


Unique anti-interference system monitors, flags and mitigates narrow and wideband interference, jamming and spoofing.

More info


UART (LVTTL, up to 4 Mbps)
Ethernet port (TCP/IP, UDP, LAN 10/100 Mbps)
USB device port (TCP/IP communication and
with 2 extra serial ports)
xPPS output (max 100Hz)
Outputs to drive external LEDs
Event markers
More info

Depending on configuration.

General purpose output
NTRIP (client)
FTP server, FTP push, SFTP
RTK performance
More info

RMS levels. Baseline <40 km. After convergence.

Horizontal accuracy
More info

+ 0.5 ppm

0.6 cm
Vertical accuracy
More info

+ 1 ppm

1 cm
Initialisation time
7 s


Velocity accuracy
More info

Open sky conditions. RMS levels.

3 cm/s

Product datasheet

Support documentation

AsteRx-m3 Hardware Manual v2.3.0
2.14 MB

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