Septentrio AsteRx-i3 S Pro+
AsteRx-i3 S Pro+ – GNSS/INS Board with Tethered IMU for Flexible Installation
The AsteRx-i3 S Pro+ is a high-precision GNSS/INS receiver board that delivers centimetre-level positioning with full 3D orientation in even the most demanding environments. Combining advanced GNSS technology with a tethered Inertial Measurement Unit (IMU), it provides reliable heading, pitch and roll data for continuous, accurate positioning — even during brief GNSS interruptions.
Its sensor-fusion engine delivers robust dead-reckoning performance, ensuring smooth operation where satellite visibility is limited. The tethered IMU design allows flexible installation directly at the motion point of interest, making it ideal for integration into compact or constrained systems such as autonomous platforms, robotics, and precision guidance applications.
With dual-antenna capability, the AsteRx-i3 S Pro+ provides immediate and precise heading from initialisation, eliminating dependence on magnetic sensors or movement. Featuring low power consumption, a lightweight and compact form factor, and access to raw GNSS and IMU data, it offers full integration freedom for OEM developers.
The receiver is supported by Septentrio’s advanced GNSS+ Algorithm Suite – including AIM+, LOCK+, IONO+, and APME+ – ensuring high reliability under vibration, interference, and multipath conditions. Integration is fast and straightforward through the intuitive Web User Interface (WebUI), with automatic lever-arm optimisation and extensive online support resources.
Key Features
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GNSS/INS integration – combines RTK GNSS and inertial data for reliable, centimetre-level positioning and 3D orientation.
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Tethered IMU flexibility – allows installation of the IMU at the precise motion point for optimal accuracy.
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Continuous positioning – maintains reliable navigation and dead-reckoning during short GNSS outages.
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Dual-antenna heading – delivers immediate, sub-degree heading accuracy from initialisation.
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Lightweight and power-efficient – ideal for embedded OEM applications requiring compact design and low power use.
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Full raw data access – complete GNSS and IMU data available for advanced integration and analysis.
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GNSS+ Algorithm Suite – includes AIM+, LOCK+, IONO+, and APME+ for resilience against interference, multipath and ionospheric effects.
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Fast, easy integration – intuitive WebUI, automatic lever-arm optimisation, and full documentation ensure seamless setup and control.
