Holybro H-RTK F9P Ultralight
Holybro H-RTK F9P Ultralight is an ultra-lightweight RTK GNSS module built around the U-blox ZED-F9P. It also integrates an IST8310 compass and a helical antenna. As a result, it targets weight-sensitive applications where every gram matters.
Beyond multi-constellation support, the Holybro H-RTK F9P Ultralight receives and tracks multiple GNSS systems. Thanks to its multi-band RF front-end architecture, it picks up signals from all four major GNSS constellations — GPS, GLONASS, Galileo, and BDS — at the same time. When paired with correction data, it processes all visible satellites and delivers a precise RTK navigation solution.
Furthermore, users can configure the module to receive GPS, GLONASS, Galileo, BDS, QZSS, and SBAS simultaneously. This setup delivers high-performance position reporting and navigation. Not only does it offer outstanding sensitivity and fast acquisition times, but its interference suppression tools also maintain reliable positioning even under poor signal conditions.
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Specification:
| GNSS module | u-blox ZED-F9P | |
| Compass | IST8310 | |
| Weight | 21.4g | |
| Application | Rover (Aircraft) | |
| Receiver type | ■ GPS L1C/A L2C ■Galileo E1 E5b
GLONASS G2 G1 ■BDS B1l B2l |
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| Sensitivity | Tracking | -163dBm |
| Reacquisition | -147dBm | |
| Time-To-First-Fix¹ | Cold Start | ≤35 s |
| Warm Start | 20s | |
| Hot Start | 1 s | |
| Position accuracy² | Autonomous | 2.0 m CEP |
| DGNSS | 0.5m CEP | |
| RTK | 1cm+1ppm (Horizontal)3 | |
| Accuracy of time pulse signal | RMS | 30ns |
| Velocity accuracy | GNSS | 0.1 m/s |
| D-GNSS | 0.05 m/s | |
| Operational limits4 | Dynamics | ≤ 4 g |
| Altitude | 18000 m | |
| Velocity | 515 m/s | |
| Baud Rate | 38400-230400 bps（Default 38400 bps） | |
| Max navigation update rate | 10Hz (If you need a greater navigation update rate, please contact us) | |
| 1. All satellites at ≥-130dBm
2. CEP, 50%, 24 hours static, ≥-130dBm, > 8SVs 3. Based on 30km, the accuracy error increases by 1cm every 10km from the base station 4. Assuming Airborne < 4 g platform |
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Pin Map
| No. | Name | I/O | Description |
| 1 | VCC | P | Main supply |
| 2 | RX1 | I |
GPS RX1 |
| 3 | TX1 | O |
GPS TX1 |
| 4 | SCL | I/O |
I2C Clock（keep open if not used） |
| 5 | SDA | I/O |
I2C Clock（keep open if not used） |
| 6 | RX2 | I |
GPS RX2 |
| 7 | TX2 | O |
GPS TX2 |
| 8 | GND | G |
Ground |
Dimensions:
Package Included:
- H-RTK F9P Ultralight *1
- GH 10P cable 200mm *1
- GH 6P cable 200mm *1
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