AsteRx-U3 Marine
Multi-constellation, dual-antenna GNSS receiver for marine applications
- Full-constellation, triple-frequency satellite tracking on both antennas
- Sub-degree GNSS heading & pitch or heading & roll
- Centimeter-level (RTK) performance and sub decimeter-level (PPP) position accuracy
- L-band reception, robust against Iridium and Inmarsat uplink interference
- Support for FUGRO Marinestar corrections
- AIM+ unique interference mitigation system as part of the advanced GNSS+ algorithm suite
- Integrated UHF radio, cellular modem, Bluetooth and Wi-Fi

GNSS technology
SBAS: EGNOS, WAAS, GAGAN, MSAS, SDCM (L1, L5)
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NavIC: L5
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Septentrio’s patented GNSS+ technologies
Interfaces
Hi-speed serial ports (RS232)
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3 |
1 | |
High-speed/full-speed USB device port
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1 |
Event markers
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2 |
xPPS output (max. 100 Hz)
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1 |
Integrated bluetooth (2.1 + EDR/4.0)
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1 |
EU 4G LTE model
4G compatibility in Europe and other regions: 4G LTE CAT4 (B1, B3, B5, B7, B8, B20), 3G UMTS/HSDPA/HSUPA (850/900/1900/2100), 2G GSM/GPRS/EDGE (850/900/1800/1900) |
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Integrated WiFi (802.11 b/g/n)
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Integrated position accuracy
1.2 m | |
Standalone - vertical
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1.9 m |
SBAS - horizontal
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0.6 m |
SBAS - vertical
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0.8 m |
DGNSS - horizontal
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0.4 m |
DGNSS - vertical
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0.7 m |
Product datasheet
Support documentation
Important notes – Firmware upgrade:
- An issue with FW version 4.14.1 was found that can (although unlikely) affect Ethernet connectivity in specific cases. The distribution of this FW version was therefore stopped. We advise customers to upgrade their receivers to v4.14.2
- We advise customers to install AsteRx-U3 MARINE-4.14.2-failsafe.suf under stable power supply conditions.