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7Semi ZED-F9P GNSS RTK Modem - Centimeter Accuracy with Multi-Band RTK
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7Semi ZED-F9P Dual-Band GNSS RTK SMA Modem Achieve centimeter-level...7Semi ZED-F9P Dual-Band GNSS RTK SMA Modem
Achieve centimeter-level positioning accuracy with the 7Semi ZED-F9P Dual-Band GNSS RTK SMA Modem. Built around the industry-leading u-blox ZED-F9P module, this professional-grade GNSS receiver delivers Real-Time Kinematic (RTK) precision for demanding applications including UAV navigation, precision agriculture, surveying, robotics, and industrial automation.
Centimeter-Level Accuracy with RTK
1 cm + 1 ppm horizontal accuracy when used with RTK corrections. The dual-band receiver processes signals from GPS, GLONASS, Galileo, and BeiDou simultaneously, ensuring reliable positioning even in challenging environments.
Key Features
High-Precision Positioning
- RTK Accuracy - 1 cm + 1 ppm horizontal positioning
- 184-Channel Receiver - Maximum satellite tracking capability
- Dual-Band (L1/L2) - Ionospheric error correction for better accuracy
- Fast Convergence - RTK fix in under 10 seconds
- 20 Hz Update Rate - High-speed position updates
Multi-Constellation Support
- GPS - L1C/A + L2C signals
- GLONASS - L1OF + L2OF signals
- Galileo - E1B/C + E5b signals
- BeiDou - B1I + B2I signals
- QZSS & SBAS - Regional augmentation support
Versatile Connectivity
- USB-C - Easy computer connection and power
- Dual UART - UART1 for data, UART2 for RTCM corrections
- I2C - Standard I2C interface
- SPI - High-speed SPI communication
- Qwiic - SparkFun Qwiic connector for solder-free prototyping
- SMA Connector - Standard antenna connection
Advanced Capabilities
- Moving Base Mode - Both base and rover can be in motion
- Survey-In Mode - Auto-calibrate base station position
- PointPerfect Native - u-blox correction service support
- Anti-Jamming - Active interference detection and removal
- Anti-Spoofing - Advanced security algorithms
- Geofencing - Programmable geographic boundaries
Technical Specifications
| GNSS Performance | |
| GNSS Module | u-blox ZED-F9P (184 channels) |
| Frequency Bands | Dual-band L1/L2 |
| Constellations | GPS, GLONASS, Galileo, BeiDou (concurrent) |
| RTK Accuracy (Horizontal) | 0.01 m + 1 ppm CEP |
| RTK Convergence Time | < 10 seconds |
| Navigation Update Rate | Up to 20 Hz |
| Cold Start Time | 24 seconds |
| Aided Start Time | 2 seconds |
| Interfaces | |
| USB | USB-C (USB 2.0 Full Speed) |
| Serial | UART1, UART2 (configurable baud) |
| I2C | Standard I2C |
| SPI | Up to 5.5 MHz |
| Qwiic | SparkFun Qwiic connector |
| Antenna | SMA Female connector |
| Electrical | |
| Operating Voltage | 3.3V to 5V |
| Operating Current | ~68 mA typical |
| Backup Battery | Rechargeable coin cell (pre-installed) |
| Physical | |
| Dimensions | 45.85 x 42.71 mm |
| Weight | 14 grams |
| Operating Temperature | -40C to +85C |
| Protocols | |
| Output | NMEA, UBX binary |
| Corrections | RTCM 3.x, SPARTN |
Operating Modes
Rover Mode
Receives RTK corrections from a base station or NTRIP service to compute centimeter-accurate position. Default operating mode for most applications.
Base Station Mode
Survey-In mode automatically determines precise position. Then generates RTCM 3.x correction data for rover receivers. Perfect for setting up your own base station.
Moving Base Mode
Both base and rover can be in motion while maintaining accurate relative positioning. Ideal for UAV follow-me features and heading calculation on moving platforms.
Perfect For Many Applications
UAV / Drones
Precision landing, autonomous flight, follow-me, aerial mapping
Precision Agriculture
Tractor guidance, auto-steer, variable rate application, field mapping
Surveying
Land surveys, construction layout, GIS data collection, topographic mapping
Robotics
Autonomous robots, lawn mowers, warehouse AGVs, navigation
Marine
Coastal mapping, port operations, vessel tracking, hydrographic surveys
Research
GNSS research, algorithm development, sensor fusion, academic projects
What's in the Box
- 1x 7Semi ZED-F9P RTK Modem - With USB-C and Qwiic connectors
- 1x Rechargeable Backup Battery - Pre-installed on board
- 10x Pin Headers - Single row for breadboard integration
What You Need (Sold Separately)
Essential Items - NOT Included
- Multi-Band GNSS Antenna - L1/L2 active antenna with SMA connector (required)
- RTK Correction Source - Base station, NTRIP service, or PointPerfect subscription
- USB-C Cable - For computer connection and configuration
- Ground Plane - For patch-style antennas (70mm+ recommended)
Important Information
RTK Corrections Required for Centimeter Accuracy
Without RTK corrections, accuracy is approximately 1.5-2.5 meters (standard GNSS). To achieve centimeter-level accuracy, you need one of the following:
- Your Own Base Station - Second ZED-F9P module as base
- NTRIP Service - Network RTK via internet
- PointPerfect - u-blox satellite correction service (subscription)
Multi-Band Antenna Required
This module requires an external GNSS antenna (not included). For full RTK performance, use a multi-band L1/L2 antenna. Single-band L1 antennas will work but with reduced RTK accuracy and longer convergence time.
Clear Sky View Required
GNSS requires direct line-of-sight to satellites. This module will not work indoors or in areas with heavy obstruction (dense tree cover, urban canyons, etc.). For best performance, mount antenna with unobstructed 360-degree sky view.
How RTK Works
Real-Time Kinematic (RTK) positioning uses correction data from a reference station with known coordinates. The rover (this module) compares its satellite observations with those from the base station to compute a highly accurate relative position.
| Mode | Accuracy | Requirements |
|---|---|---|
| Standard GNSS | ~1.5 - 2.5 meters | Module + Antenna only |
| SBAS (WAAS/EGNOS) | ~1 meter | Module + Antenna (automatic) |
| RTK Float | ~20 - 50 cm | Module + Antenna + Corrections (converging) |
| RTK Fixed | ~1 - 2 cm | Module + Antenna + Corrections (resolved) |
Comparison: RTK vs Standard GPS
| Feature | ZED-F9P (RTK) | Standard GPS (NEO-M8N) |
|---|---|---|
| Accuracy | 1 cm (with RTK) | 2.5 meters |
| Frequency Bands | Dual-band (L1/L2) | Single-band (L1) |
| RTK Support | Yes | No |
| Convergence | < 10 seconds | N/A |
| Use Case | Precision applications | General navigation |
Software Compatibility
Configuration Tools:
- u-center - Official u-blox configuration software (Windows)
- u-center 2 - Next-generation configuration tool
Libraries:
- SparkFun u-blox Arduino Library - Easy Arduino integration
- pyubx2 - Python library for UBX protocol
- gpsd - Linux GPS daemon
Compatible With:
- Arduino (all models)
- Raspberry Pi
- ESP32
- Pixhawk / ArduPilot / PX4
- Mission Planner
- QGroundControl
- RTKLIB
Frequently Asked Questions
Q: What accuracy can I achieve?
A: With RTK corrections, 1 cm + 1 ppm horizontal accuracy. Without RTK, approximately 1.5-2.5 meters.
Q: Do I need two modules for RTK?
A: For your own base station, yes. Alternatively, use NTRIP services (network RTK) with just one rover module.
Q: What antenna do I need?
A: A multi-band L1/L2 GNSS antenna with SMA connector. Active antennas are recommended. Antenna not included.
Q: Will this work indoors?
A: No. GNSS requires direct line-of-sight to satellites and will not work indoors.
Q: Is this compatible with Arduino?
A: Yes! Use UART, I2C, or SPI interfaces. SparkFun provides an excellent Arduino library for u-blox modules.
Q: What is Moving Base mode?
A: Both base and rover can be in motion while maintaining accurate relative positioning - ideal for UAV follow-me features.
Why Buy from CrazyPi.com?
- Genuine Products - Authentic 7Semi and u-blox components
- Expert Support - Technical assistance for RTK setup
- Fast Shipping - Quick delivery across India
- Complete Ecosystem - Antennas, cables, and accessories available
- Bundle Deals - Save on complete RTK kits
Complete RTK Kits Available!
Get everything you need for centimeter-accurate positioning. We offer RTK Starter Kits, Base + Rover Kits, UAV RTK Kits, and Precision Agriculture Kits with modules, antennas, radios, and accessories - all at discounted bundle prices!
Technical Resources
- u-blox ZED-F9P Documentation - Datasheets, integration manuals
- u-center Software - Free configuration tool from u-blox
- RTKLIB - Open-source RTK processing software
- ArduSimple Tutorials - Excellent RTK setup guides
Centimeter-Level GNSS Accuracy - Now Accessible for Your Projects
Buy 7Semi ZED-F9P GNSS RTK Modem at CrazyPi.com - India's source for precision positioning solutions.