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Septentrio AsteRx-m2 Sx GNSS Receiver Board

The AsteRx-m2 Sx from Septentrio is a compact, high performance, ultra-low power GNSS receiver board ideal for integration in UAS, handheld devices and other demanding industrial applications where power and space are at a premium. It delivers out-of-the-box sub-decimeter accuracy thanks to the built-in PPP-RTK correction service.



The AsteRx-m2 Sx GNSS receiver board from Septentrio provides high-accuracy GNSS positioning right out of the box. No need for any additional correction service selection, subscription and maintenance. This robust OEM receiver board delivers reliable sub-decimeter accuracy with short convergence time. This is made possible by an integration of a PPP-RTK high-accuracy correction service into Septentrio’s latest core GNSS technology.

The AsteRx-m2 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.

The AsteRx-m2 Sx comes with fully-documented interfaces, commands and data messages. The included RxTools software allows receiver configuration and monitoring as well as data logging and analysis. An SDK is provided to help integrators create professional custom applications. The AsteRx-m2 Sx is compatible with GeoTagZ Software and its SDK library for PPK (Post-Processed Kinematic) offline processing.


  • Sub-decimeter accuracy out of the box, with no additional service subscription or maintenance required
  • Five-year lifetime PPP-RTK corrections service included and is available throughout US and Europe
  • Short convergence time
  • Industry-leading ultra-low power consumption
  • All-in-view multi-constellation, multi-frequency satellite tracking
  • AIM+ anti-jamming and anti-spoofing system
  • LOCK+ for robust tracking during high vibrations and shocks
  • APME+ to disentangle direct signals from those reflected off nearby structures
  • IONO+ provides advanced protection against ionospheric disturbance

Technical Specifications

Signal Tracking
GPS: L1, L2, L5
Galileo: E1, E5a, E5b, AltBoc
BeiDou: B1, B2
QZSS: L1, L2, L5
L-Band: Integrated dual-channel L-band receiver
PPP-RTK Performance
Horizontal Accuracy: <eq; 10 cm at 2 sigma
Initialisation/Convergence: <eq; 60 s
Coverage: EU and USA
RTK Performance
Horizontal Accuracy: 0.6 cm + 0.5 ppm
Vertical Accuracy: 1 cm + 1 ppm
Initialisation: 7 s
Position Accuracy
Standalone: 1.2 m (Horizontal)
1.9 m (Vertical)
SBAS: 0.6 m (Horizontal)
0.8 m (Vertical)
DGPS: 0.4 m (Horizontal)
0.7 m (Vertical)
Velocity Accuracy: 0.03 m/s
Cold Start: < 45 s
Warm Start: < 20 s
Re-Acquisition: 1.0 s (Average)
Position Update Rate: 100 Hz
Measurements Update Rate: 100 Hz
Size: 47.5 mm × 70 mm × 7.6 mm
1.87 in × 2.75 in × 0.29 in
Weight: 28 g / 0.987 oz
Input Voltage: 3.3 VDC ± 5%
Power Consumption: 770 mW (GPS/GLO L1/L2)
950 mW (all signals/constellations)
1050 mW (all signals/constellations + L-band)
10 mW (Shutdown power mode)
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: Random MIL-STD 810G
Certification: RoHS, WEEE


The AsteRx-m2 Sx GNSS receiver board from Septentrio is available through TerrisGPS. If you would like more information about this product, please feel free to get in touch with us by completing 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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