Understanding GNSS Receiver Startup States
GNSS receivers have different startup states depending on how long they’ve been off and what data they have stored. These states directly affect how quickly your drone can begin a mission.
Startup State Comparison
| State | Definition | Typical Time | Data Available |
|---|---|---|---|
| Cold Start | No ephemeris, almanac, or approximate position | 25-45 seconds | None |
| Warm Start | Valid almanac and approximate position, no ephemeris | 10-25 seconds | Almanac, position, time |
| Hot Start | Valid ephemeris (less than 4 hours old) | 2-10 seconds | All data |
Septentrio Receiver Startup Performance
- Mosaic-X5: Cold start <30s, warm start <10s, hot start <3s
- Mosaic-G5 P3: Cold start <35s, warm start <10s, reacquisition <1s
- AsteRx-m3 Pro+: Cold start <25s, hot start <3s
Optimizing Startup for Drone Operations
- Keep receiver powered during brief shutdowns to maintain hot-start capability
- Store almanac data in non-volatile memory for faster warm starts
- Pre-position drone in open sky area before power-up
- Use backup battery for RTC to maintain time reference
Related GNSS Products
- HB21 GNSS Box Receiver — All-in-one RTK receiver with 4G LTE, heading, and data logging
- HB6 GNSS Box Receiver — Compact RTK receiver powered by Septentrio Mosaic X5
- EV322 GNSS Receiver — Lightweight RTK receiver for UAVs and autonomous systems
- AIM+ Anti-Jamming Technology — Advanced interference and spoofing protection
Browse our full GNSS receiver collection for professional UAV applications.
Frequently Asked Questions
What accuracy can I expect from this GNSS solution?
Septentrio GNSS receivers deliver 0.6 cm + 0.5 ppm horizontal and 1.0 cm + 1 ppm vertical accuracy with RTK. The exact performance depends on satellite geometry, atmospheric conditions, and correction data quality.
Does this work with ArduPilot or PX4 flight controllers?
Yes. Septentrio receivers output SBF protocol which is natively supported by both ArduPilot (GPS_TYPE=9) and PX4 (GPS_TYPE=9). Simply connect the UART interface and configure the GPS parameter for plug-and-play operation.
Can I use this receiver without an RTK base station?
Yes. You can use NTRIP corrections via a cellular connection, or use Galileo HAS (free satellite-delivered corrections on supported modules). For post-processing, the receiver logs raw data for PPK processing.
How do I order or get technical support?
Contact our sales team at sales@uav-gnss.com for pricing and availability. Technical documentation, integration guides, and configuration tools are available through our website resources section.
