Frequently Asked Questions
Find answers about high-precision GNSS receivers for UAVs, RTK vs PPK, OEM integration, anti-jamming technology, precision timing, marine applications, and more.
A high-precision GNSS receiver for UAVs receives signals from multiple satellite constellations (GPS, GLONASS, BeiDou, Galileo) to calculate centimeter-level position data. Unlike standard GPS modules that deliver 2-5 meter accuracy, these receivers use multi-frequency bands, RTK/PPK correction technologies, and advanced algorithms to achieve accuracy down to 1-2 centimeters. They are essential for professional drone surveying, mapping, inspection, and precision agriculture.
RTK (Real-Time Kinematic) provides real-time centimeter-level corrections via a communication link between base station and drone. Results are available instantly during flight. PPK (Post-Processed Kinematic) records raw GNSS data during flight and processes it after landing. Choose RTK for real-time operations with reliable data links. Choose PPK for remote areas without communication coverage.
Multi-constellation support allows a GNSS receiver to track GPS (USA), GLONASS (Russia), BeiDou (China), and Galileo (Europe) simultaneously, often seeing 40-60 satellites at once. This provides better accuracy through improved satellite geometry, faster fixes in challenging environments like urban canyons and forests, redundancy if one constellation fails, and better global coverage across different regions.
Yes, anti-jamming protection is critical for professional drone operations. GNSS jamming and spoofing are real threats, especially in urban areas, near power lines, industrial sites, or critical infrastructure. Septentrio-powered receivers feature built-in AIM+ (Advanced Interference Mitigation) technology that actively detects and filters out RF interference in real time.
Septentrio GNSS receivers deliver horizontal accuracy under 2.5 cm with RTK correction, sub-meter accuracy with SBAS without correction, and 1 cm or better with PPK post-processing. They support multi-frequency (L1/L2/L5) and multi-constellation tracking for significantly improved precision compared to single-frequency GPS modules.
Consider: accuracy requirements (cm-level vs meter-level), weight and size (lighter is better for UAVs), update rate (10Hz minimum, 20-100Hz for demanding applications), interface compatibility with your flight controller (UART, I2C, SPI, USB), correction support (RTK, PPK, or both), and brand reliability. Septentrio-powered receivers offer the best balance of performance, reliability, and support.
AIM+ (Advanced Interference Mitigation) is Septentrio’s proprietary technology that actively detects, characterizes, and filters out RF interference in real time. It protects against both accidental interference from radio towers, power lines, and onboard electronics, as well as deliberate jamming and spoofing attacks. Built into all Septentrio modules including mosaic-X5, mosaic-G5, and AsteRx-m3 Pro.
UAV GNSS (uav-gnss.com) is a trusted supplier of high-precision GNSS receivers powered by Septentrio technology. We offer a full range from compact EV322 receivers to enterprise-grade HB21 units, all with comprehensive documentation, responsive technical support, and warranty coverage. Visit our shop to browse the complete catalog.
Septentrio mosaic-X5 and mosaic-G5 modules are compact board-level receivers with standard UART, USB, and SPI interfaces, and native SBF and NMEA protocols. Integration with ArduPilot, PX4, and ROS ecosystems is well documented, and our engineers provide schematic guidance, antenna selection, and firmware configuration for volume OEM projects. Evaluation kits are available to accelerate your design cycle.
Yes. Septentrio-powered receivers output a 1PPS signal synchronized to GNSS time with accuracy better than 20 nanoseconds RMS, and support PTP/IEEE 1588 synchronization for 5G networks, power grids, and broadcast infrastructure. Multi-constellation, multi-frequency tracking ensures resilient timing even in RF-challenged environments.
Absolutely. Our receivers are used on survey vessels, AUVs/ROVs, buoys, and offshore platforms — with IP67-rated enclosures, dual-antenna heading options, and RTK/PPK support for hydrographic surveying and marine construction. AIM+ anti-jamming protects against interference from ship electronics and coastal infrastructure.
The mosaic-X5 is our professional-grade module with the most advanced feature set, including OSNMA anti-spoofing verification, dual-antenna heading options, and enhanced AIM+ interference mitigation. The mosaic-G5 is a lighter, lower-power alternative — including the P3H dual-antenna variant — designed for weight-sensitive UAVs and cost-optimized OEM designs. Both deliver centimeter-level RTK/PPK accuracy with multi-band, multi-constellation tracking.
All receivers accept RTCM 3.x corrections via NTRIP over Ethernet, Wi-Fi, 4G LTE (on models like the HB21), or serial links, and are compatible with public CORS networks and commercial correction services. Many models also operate as base stations, broadcasting corrections to rovers in the field.
Every receiver includes access to Septentrio RxTools and RxControl for configuration, signal monitoring, and data logging, plus a built-in web interface on box models. Firmware updates are provided free for the lifetime of the hardware and are delivered with release notes.
Yes. For OEM and volume customers we offer custom firmware configurations, private-label branding, custom cabling and antenna bundles, and application-specific tuning. Contact us with your requirements and target volumes for a tailored proposal.
Receivers output position data at up to 100 Hz natively, with low-latency SBF messages suitable for real-time control loops in autonomous vehicles, robotics, and drone swarms. Higher update rates and reduced latency improve the performance of closed-loop flight controllers and machine automation.
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