AsteRx-m3 Pro+

AsteRx-m3 Pro+ – UAV OEM GNSS Receiver for High-Precision Positioning

Overview of the AsteRx-m3 Pro+ GNSS Receiver

The AsteRx-m3 Pro+ is Septentrio’s best-in-class OEM GNSS receiver board, engineered for UAVs, drones, robotics, and advanced surveying systems. With more than two decades of GNSS innovation, this versatile multi-frequency, multi-constellation receiver offers centimeter-level RTK accuracy and delivers robust positioning performance in the most demanding environments. Whether used as a base station or a rover receiver, the AsteRx-m3 Pro+ provides unmatched flexibility for professional applications.

High-Accuracy GNSS Technology for UAVs and Robotics

Designed to meet the needs of UAV and autonomous systems, the AsteRx-m3 Pro+ GNSS receiver features dual antenna support, delivering reliable heading and pitch or heading and roll information alongside precise positioning. A powerful CPU combined with a 100 Hz data update rate ensures fast and accurate performance, enabling real-time navigation, mapping, and control.

AIM+ Anti-Jamming and Spoofing Protection

In today’s UAV and robotics operations, GNSS signal interference is a critical challenge. The AsteRx-m3 Pro+ integrates AIM+ Advanced Interference Mitigation technology, providing built-in protection against both unintentional and intentional jamming and spoofing. By monitoring and filtering RF signals, AIM+ guarantees robust and continuous operation even in environments with heavy electronic interference, ensuring UAVs and autonomous platforms stay reliable in the field.

Optimized SWaP for UAV Missions

Efficiency is essential for UAV-based GNSS receivers. The AsteRx-m3 Pro+ is engineered with optimized SWaP (Size, Weight and Power), offering the lowest power consumption in its class. This means longer flight times, extended operation on a single battery charge, and better overall mission performance without sacrificing positioning accuracy.

GNSS+ Technology for Maximum Reliability

The AsteRx-m3 Pro+ comes equipped with Septentrio’s GNSS+ Technology Suite, which ensures optimal performance in even the most challenging conditions:

LOCK+ Vibration Resistance

Maintains continuous GNSS tracking in environments with heavy vibration or mechanical shocks, making it ideal for UAVs and robotics.

IONO+ Ionospheric Protection

Provides advanced correction for ionospheric disturbances, ensuring reliable RTK positioning in regions with high ionospheric activity.

APME+ Multipath Mitigation

Eliminates signal reflection errors caused by nearby metal structures, enhancing both position accuracy and measurement quality.

Easy Integration and Control

The AsteRx-m3 Pro+ UAV GNSS receiver is simple to integrate into any system. It features fully documented interfaces, commands, and data outputs for fast deployment. The included RxTools software suite allows configuration, monitoring, and data analysis, while the intuitive web user interface enables control and monitoring from any mobile device or computer.

Applications of the AsteRx-m3 Pro+ GNSS Receiver

The versatility and reliability of the AsteRx-m3 Pro+ make it an excellent choice for a wide range of professional applications, including:

• UAVs and Drones – Aerial mapping, surveying, and precision agriculture.

• Robotics and Autonomous Systems – Reliable navigation for ground and industrial robots.

• Marine and Land Surveying – High-accuracy positioning for professional surveying projects.

• GIS and Industrial Applications – Data collection and monitoring in demanding environments.

Why Choose the AsteRx-m3 Pro+ for UAV GNSS Positioning

The AsteRx-m3 Pro+ stands out as one of the most advanced UAV GNSS receivers available today. Combining RTK precision, anti-jamming protection, low SWaP design, and easy system integration, it offers unmatched reliability and value for UAV operators, surveyors, and robotics developers who demand the highest standards in GNSS performance.

AsteRx-m3 Pro+ Specifications:

GNSS Signals

• 544 hardware channels for simultaneous tracking of most visible signals:

  • GPS: L1 C/A, L1C, L2C, L2 P(Y), L5

  • GLONASS: L1 C/A, L2 C/A, L3, L2P

  • BeiDou: B1I, B1C, B2a, B2I, B3I

  • Galileo: E1, E5a, E5b

  • QZSS: L1 C/A, L1C, L2C, L5

  • NavIC: L5

  • SBAS: EGNOS, WAAS, GAGAN, MSAS, SDCM

Septentrio’s Patented GNSS+ Technologies

• AIM+: Unique anti-jamming and monitoring system against narrow and wideband interference with spectrum analyzer

• IONO+: Advanced scintillation mitigation

• APME+: A posteriori multipath estimator for code and phase multipath mitigation

• LOCK+: Superior tracking robustness under heavy mechanical shocks or vibrations

• RAIM+: Receiver Autonomous Integrity Monitoring

Formats

• Septentrio Binary Format (SBF), fully documented with sample parsing tools

• NMEA 0183 v3.01 and v4.0

• RTCM v2.x and v3.x (MSM messages included)

• CMR v2.0 and CMR+ (CMR+ input only)

Connectivity

• 4 high-speed serial ports (LVTTL)

• 1 USB device port (supports TCP/IP communication and 2 extra serial ports)

• xPPS output (max 100 Hz)

• Ethernet port (TCP/IP, UDP, LAN 10/100 Mbps)

• 2 event markers

• Outputs to drive external LEDs

• General purpose output

• NTRIP (server, client, caster)

• FTP server, FTP push, SFTP

Supporting Components

• Web UI with full control and monitoring functionality

• RxTools: Complete and intuitive GUI toolset for receiver control, monitoring, data analysis, and conversion

• GNSS receiver communication SDK available for both Windows and Linux

PERFORMANCE

RTK Performance

• Horizontal accuracy: 0.6 cm + 0.5 ppm

• Vertical accuracy: 1 cm + 1 ppm

• Initialization: 7 s

GNSS Attitude Accuracy

• Antenna separation 1 m: Heading 0.15°, Pitch/Roll 0.25°

• Antenna separation 5 m: Heading 0.03°, Pitch/Roll 0.05°

Position Accuracy

• Standalone: Horizontal 1.2 m, Vertical 1.9 m

• SBAS: Horizontal 0.6 m, Vertical 0.8 m

• DGNSS: Horizontal 0.4 m, Vertical 0.7 m

Velocity Accuracy: 0.03 m/s

Maximum Update Rate:

• Position: 100 Hz

• Measurements: 100 Hz

• Latency: <10 ms

Time Precision

• xPPS output: 5 ns (including software compensation of sawtooth effect)

• Event accuracy: <20 ns

Time to First Fix

• Cold start: <45 s (no almanac, no approximate position)

• Warm start: <20 s (ephemeris and approximate position known)

• Re-acquisition (average): 1 s

Tracking Performance

• Tracking C/N0 threshold: 20 dB-Hz

• Acquisition C/N0 threshold: 33 dB-Hz

Optional Accessories

• Antennas

• GeoTagZ re-processing software and SDK for UAS applications

• Robotics interface board

PHYSICAL AND ENVIRONMENTAL

• Size: 47.5 x 70 x 9.32 mm (1.87 x 2.75 x 0.36 in)

• Weight: 27 g (0.952 oz)

• Input voltage: 3.3 VDC ±5%

• Power consumption:

  • GPS L1/L2: 750 mW

  • GPS/GLONASS L1/L2: 800 mW

  • All signals, all GNSS constellations: 1000 mW

Antenna

• Connectors: 2 x MMCX

• Antenna supply voltage: 3–5.5 VDC

• Maximum antenna current: 150 mA

• Antenna gain range: 15–45 dB

I/O Connectors

• 30-pin Hirose DF40 socket

• 60-pin Hirose DF40 socket for expanded connectivity

Environment

• 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: MIL-STD-810G

Certification

• RoHS, WEEE

Notes

1. Open sky conditions

2. RMS level

3. Baseline < 40 km

4. 99.9%

5. Including software compensation of sawtooth effect

6. Cold start: no almanac, no approximate position

7. Warm start: ephemeris and approximate position known

8. Second connector for heading configuration

9. Backwards compatible with AsteRx-m for easy replacement