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Septentrio AsteRx-i D UAS GNSS+INS Receiver Board

The AsteRx-i D UAS from Septentrio is a GNSS+INS receiver board specifically designed for straightforward integration into Unmanned Aerial Systems (UAS).



The AsteRx-i D UAS GNSS+INS receiver board from Septentrio provides centimeter-level 3D attitude and RTK positioning. It features event marker inputs to accurately time stamp camera shutter events, as well as a 44 pin connector compatible with 3rd party integrations.

AsteRx-i D UAS is designed for demanding SWaP requirements, reducing its size, weight and power consumption. Consuming typically 2 W with a total weight of under 60 g, it is ideal for UAVs and small robots where space and payload are at a premium. The 4.5-30 V input power range allows powering the receiver directly from the UAS power bus. The IMU is soldered directly onto the board removing the need for connectors and bolts, resulting in reduced weight and size of the receiver.

Septentrio’s multi-constellation, multi-frequency, accurate and reliable RTK is further enhanced by a powerful GNSS/INS integration. Benefiting from a GNSS heading initialization, AsteRx-i D UAS provides 3D attitude and positioning directly from the start. It features Advanced Interference Mitigation (AIM+ ) technology which can suppress the widest variety of interference, from simple continuous narrowband signals to the most complex wideband and pulsed jammers.

Mounted on a UAS-tailored carrier board, the AsteRx-i D UAS integrates seamlessly into light UAV and robotics platforms. Septentrio’s open interfaces and software tools (WebUI, RxTools) make it easy to integrate, configure and control AsteRx-i D UAS.


  • Lightweight, low-power and compact
  • Full attitude: heading, pitch and roll
  • Reliable and accurate IMU-enhanced GNSS positioning down to the centimeter level
  • High update rate, low-latency positioning and attitude
  • AIM+ unique interference monitoring and mitigation system + advanced GNSS+ algorithms
  • Camera shutter synchronization
  • Robust calibration for wide temperature ranges

Technical Specifications

Signal Tracking
GPS: L1, L2
BeiDou: B1, B2
Galileo: E1, E5b
QZSS: L1, L2
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)
RTK-INS: 0.6 cm + 0.5 ppm (Horizontal)
1 cm + 1 ppm (Vertical)
Cold Start: < 45 s
Warm Start: < 20 s
Re-Acquisition: 1.2 s (Average)
RTK-INS Initialisation: 7 s
Heading Accuracy: 0.3° (Non RTK Mode)
0.2° (RTK Mode)
Pitch/Roll: 0.04° (Non RTK Mode)
0.02° (RTK Mode)
INS Velocity: 0.05 m/s (Non RTK Mode)
0.02 m/s (RTK Mode)
Input Range: ± 450°/s
Bias In-Run Instability: 7°/hr
Random Walk / Noise Density: 0.15°/√hr
Input Range: ±16 g
Bias In-Run Instability: 0.014 mg
Random Walk / Noise Density: 57 µg/√Hz
Size: 47.5 mm × 70 mm × 20 mm
1.87 in × 2.75 in × 0.79 in
Weight: 60 g / 2.1 oz
Input Voltage: 5 VDC or 4.5–30 VDC
Power Consumption: Typical 2.2 W
Operating Temperature: -40 °C to +85 °C
-40 °F to +185 °F
Storage Temperature: -40 °C to +85 °C
-40 °F to +185 °F
Humidity: 5% to 95% (non-condensing)
Vibration: Random MIL-STD 810G
Certification: RoHS, WEEE


The AsteRx-i D UAS GNSS+INS 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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"Thank you for your prompt service. All seems to be working well again. Your techs were very helpful with the troubleshooting."
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