Product Advantages
Structural and Design Advantages
The design emphasizes modular compatibility and minimal footprint, with two form factors tailored for various integration demands, weighing as little as 13.2 grams. This GNSS RTK module for UAV incorporates a sophisticated onboard INS and a dedicated IST8310 compass in a robust package supporting industrial temperature ranges. Its dual-level forms and TTL interface enable easy connection with common UAV flight controllers like Pixhawk and APM. Such engineering allows manufacturers to embed this RTK positioning module within tight spatial and power constraints while maintaining advanced multi-constellation GNSS capabilities.
Performance and Usability Benefits
Users benefit from rapid signal acquisition and high-frequency data output, delivering 100 Hz IMU readings for responsive trajectory updates. The advanced inertial navigation system mitigates GNSS signal loss impacts, maintaining stability in challenging conditions. The intuitive interface and comprehensive multi-system support reduce integration complexity for developers and operators alike. This GNSS module with compass provides accurate heading and positioning data essential for precise autonomous control, improving flight safety, mission accuracy, and user confidence in real-world UAV deployments.
丨 Product Introduction
1. High data output: Supports up to 50Hz data output, suitable for high-speed mobile drone positioning, ensuring continuous and stable trajectory tracking.2. Compatibility: Fully compatible with automatic flight control systems such as Pixhawk and APM, making it easy to integrate multiple flight platforms.3. Built in IUD: solves the problem of positioning interruption caused by satellite signal loss of lock.4. Compass configuration: Built in electronic compass IST8310 to enhance signal accuracy.丨 Specification parameters
|
Chip
characteristics
|
chip
|
UM981
|
|
working
frequency
|
BDS: B1I B2I B3I B1C B2a B2b
GPS: L1 C/A L1C L2P (Y) L2C L5
GLONASS: L1 L2
Galileo: E1 E5a E5b E6
QZSS: L1 L2 L5 L6
NavIC L5
SBAS L1C/A
|
|
Receiving channel
|
1408 channel
|
|
Sensitivity
|
track
|
-167 dBm
|
|
cold boot
|
-148 dBm
|
|
Hot start
|
-157 dBm
|
|
First positionin
time TTFF
|
cold boot
|
26s
|
|
Hot start
|
2s
|
|
Re capture
|
2s
|
|
Inertial navigation accuracy
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<5% x driving distance (no GNSS signal)
|
|
Accuracy
|
Horizontal Accuracy
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Normal positioning: 1.5m CEP
|
|
RTK positioning: 0.8cm+1 ppm CEP
|
|
speed accuracy
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0.05m/s
|
|
Second pulse accuracy
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30ns
|
|
Output data
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Baud rate
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115200bps (default) [Optional: 4800-921600]
|
|
Output interface
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TTL
|
|
Output Protocol
|
NMEA0183、Unicore
|
|
Data update frequency
|
100Hz (IMU Raw Data)
|
|
Default 1Hz (0.25Hz-50Hz)
|
|
Carrier phase output
|
Support, output RAWX statement
|
|
FLASH
|
built-in
|
|
Working
conditions
|
height
|
＜50,000m
|
|
speed
|
＜500m/s
|
|
Gravitational acceleration
|
＜4g
|
|
Electrical
specifications
|
working voltage
|
3V-5.5V DC
|
|
power waste
|
800mW @3.3V
|
|
Physical
parameters
|
size
|
Standard version:φ42*31.2mm
Upgraded version:φ44*40.6mm
|
|
weight
|
Standard version: 13.2g
Upgraded version: 21g
|
|
Connector
|
GH1.25mm 8pin
|
|
Environment
|
working temperature
|
-35℃-80℃
|
|
Storage temperature
|
-40℃-85℃
|
|
Compass
|
Compass
|
IST8310(Isentek)
|
丨 product mix
Standard version:
Upgraded version:
Table 1 PIN Function
|
NO.
|
Signal Name
|
Signal Description
|
|
1
|
VCC
|
Main power input, +3.3V to 5V
|
|
2
|
GND
|
Module ground
|
|
3
|
TX1
|
UART1 output, 3.3V TTL
|
|
4
|
RX1
|
UART1 input, 3.3V TTL
|
|
5
|
SCL
|
I²C Serial Clock （IST8310）
|
|
6
|
SDA
|
I²C Serial Data （IST8310）
|
|
7
|
TX2
|
UART2 output, 3.3V TTL
|
|
8
|
RX2
|
UART2 input, 3.3V TTL
|
Use Scenarios
Enhanced UAV Navigation Testing and Development
In UAV development environments, the GNSS RTK module for UAV plays a pivotal role in flight controller integration and system bring-up. It enables engineers to evaluate centimeter-level RTK positioning and inertial fusion, crucial for developing stable autonomous navigation algorithms. Its capability to provide continuous heading information via the integrated compass ensures reliable directional accuracy in GPS-compromised settings such as urban canyons or dense foliage. By delivering consistent high-frequency data, this module supports iterative tuning of UAV navigation software and hardware, streamlining prototyping and testing workflows.
Precision Agriculture and Geospatial Mapping Applications
In precision agriculture and geospatial survey operations, the RTK positioning module enhances the accuracy of unmanned vehicle positioning for crop monitoring, land mapping, and automated fieldwork. The module’s multi-constellation tracking and inertial navigation sustain performance across diverse terrain and signal environments, guaranteeing reliable data acquisition. Its embedded compass allows precise heading measurements critical for consistent coverage patterns and data georeferencing. Integration with specialized agricultural drones or mapping platforms ensures improved spatial resolution and operational productivity, meeting industry standards for real-time positioning and navigational reliability.
FAQ
What makes the UM981/IST8310 suitable for UAV applications?
Our GNSS RTK module for UAV combines a multi-constellation GNSS receiver with an INS and built-in IST8310 compass, providing centimeter-level positioning and stable heading even in GNSS-denied environments, ideal for precise UAV navigation and smooth flight control integration.
Can I customize the UM981/IST8310 GNSS RTK module for specific projects?
Yes, we offer OEM/ODM customization options for our RTK positioning module, including firmware tuning, parameter adjustments, and packaging solutions. Our technical team will work closely with you to adapt the module to your exact application needs and integration requirements.
How do I integrate the UM981/IST8310 module with existing flight controllers like Pixhawk or APM?
The module supports standard TTL interfaces and communicates at configurable baud rates, making it compatible with popular flight controllers such as Pixhawk and APM. We provide technical consulting and firmware support to ensure seamless integration and reliable data fusion.
What quality assurances do you provide for your GNSS modules?
All our GNSS module with compass products undergo strict multi-stage quality control, including SMT production, functional testing, and final inspection. We are ISO9001:2015 certified and comply with CE and RoHS standards, ensuring industrial-grade reliability for your deployment.
