丨 Product Introduction
1. Base station or roaming vehicle configuration: Provides high flexibility for different scenarios.
2. Differential positioning and vector attitude measurement: providing accurate position and direction.
3. Compatibility with flight control systems: Integration with Pixhawk and APM.
4. Four mode RTK: Ensure fast and accurate positioning in various environments.
丨 Specification parameters
|
Chip
characteristics
|
chip
|
UM982
|
|
Working mode
|
BDS: B1I、B2I、B3I
GPS: L1C/A、L2P (Y)、L2C、L5
GLONASS: L1、L2
Galileo: E1、E5a、E5b
QZSS: L1、L2、L5
|
|
Receiving channel
|
1408 channel
|
|
Accuracy
|
Single point positioning (RMS)
|
Plane: 1.5m
|
|
Elevation: 2.5m
|
|
DGPS(RMS)
|
Plane: 0.4m
|
|
Elevation: 0.8m
|
|
RTK(RMS)
|
Flat: 0.8cm+1ppm
|
|
Elevation: 1.5cm+1ppm
|
|
Directional accuracy (RMS)
|
0.2 degrees/1m baseline
|
|
Time accuracy (RMS)
|
20 ns
|
|
Speed accuracy (RMS)
|
0.2 m/s
|
|
Observation accuracy (RMS)
|
BDS
|
GPS
|
GLONASS
|
Galileo
|
|
B1I/B1C/L1 C/A/E1/G1 pseudorange
|
10cm
|
10cm
|
10cm
|
10cm
|
|
B1I/B1C/ L1 C/A/E1/G1 Carrier Phase
|
1mm
|
1mm
|
1mm
|
1mm
|
|
B3I/L2P(Y)/L2C/G2 pseudorange
|
10cm
|
10cm
|
10cm
|
10cm
|
|
B3I/L2P(Y)/L2C/G2 Carrier Phase
|
1mm
|
1mm
|
1mm
|
1mm
|
|
B2I/ L5/E5a/E5b pseudorange
|
10cm
|
10cm
|
10cm
|
10cm
|
|
B2I/ L5/E5a/E5b Carrier Phase
|
1mm
|
1mm
|
1mm
|
1mm
|
|
Time To First
Fix TTFF
|
cold boot
|
＜20s
|
|
Initialization time
|
＜5s ( Typical values)
|
|
Initialize reliability
|
＞99.9%
|
|
Output data
|
Baud rate
|
115200bps (default) [Optional: 4800-921600]
|
|
Output interface
|
TTL/USB
|
|
Output Protocol
|
NMEA0183、RTCM 3.3
|
|
Data update rate
|
1Hz-20Hz (default 1Hz)
|
|
Differential data
|
RTCM 3.3/3.2/3.1/3.0
|
|
Carrier phase output
|
Support, output RAWX statement
|
|
FLASH
|
built-in
|
|
Electrical
specifications
|
working voltage
|
3~5.5V DC
|
|
power waste
|
<800mW
|
|
Physical
parameters
|
size
|
66*45mm*3.5mm
|
|
weight
|
17.4g
|
|
Connector
|
2×GH1.25mm 6pin
|
|
Antenna connector
|
SMA Elbow (customizable)
|
|
Environment
|
working temperature
|
-35℃-80℃
|
|
Storage temperature
|
-40℃-85℃
|
Table 1 PIN Functionality
|
Pin Number
|
Signal Name
|
Signal Description
|
|
CN1
|
1
|
TX1_232
|
Serial port 1 transmit, RS232 level
|
|
2
|
RX1_232
|
Serial port 1 receive, RS232 level
|
|
3
|
VCC
|
+5V power input
|
|
4
|
GND
|
Ground
|
|
5
|
TX1
|
Serial port 1 transmit, 3.3V TTL level
|
|
6
|
RX1
|
Serial port 1 receive, 3.3V TTL level
|
|
CN2
|
1
|
TX2_232
|
Serial port 2 transmit, RS232 level
|
|
2
|
RX2_232
|
Serial port 2 receive, RS232 level
|
|
3
|
VCC
|
+5V power input
|
|
4
|
GND
|
Ground
|
|
5
|
TX2
|
Serial port 2 transmit, 3.3V TTL level
|
|
6
|
RX2
|
Serial port 2 receive, 3.3V TTL level
|
|
LED Indicators
|
1
|
RTK-STAT
|
RTK positioning indicator, high level active, outputs high level when RTK fixed. Other positioning states or no positioning output low level.
|
|
2
|
POWER
|
Indicates power supply status
|
|
3
|
PPS1
|
Pulse per second output 1, outputs pulse per second after positioning, LED flashes
|
|
4
|
PPS2
|
Pulse per second output 2, outputs pulse per second after positioning, LED flashes
|
Table 2 Interface Characteristics
|
No.
|
Name
|
Symbol
|
Min
|
Typical
|
Max
|
Unit
|
|
1
|
Main Power Supply
|
Vcc
|
2.7
|
3.3
|
5.0
|
V
|
|
2
|
RF Port Feeding
|
VRF
|
1.4
|
3.3
|
3.6
|
V
|
|
3
|
Input High Level
|
VIH
|
2.0
|
|
|
V
|
|
4
|
Input Low Level
|
VIL
|
|
|
0.7
|
V
|
|
5
|
Output High Level
|
VOH
|
3.2
|
|
|
V
|
|
6
|
Output Low Level
|
VOL
|
|
|
0.1
|
V
|
|
7
|
Main Serial Baud RateBaud
|
Baud
|
|
115200
|
|
bps
|
|
8
|
Differential Wave
|
Baud
|
|
115200
|
|
bps
|
Packaging and Delivery：
Centimeter-Level GNSS Positioning Engine
The DALANG AK372W is a dual-antenna RTK module based on the UM982 platform, delivering real-time centimeter-level accuracy for UAVs, automotive navigation, and surveying. Configurable as base station or rover, it uses carrier phase differential technology with up to 1 cm accuracy and 1-20Hz output rate.
High-Frequency RTK Positioning & Heading
With multi-band RTK engine and dual-antenna design, the AK372W achieves fast fixed solutions in various environments, providing stable GNSS positioning and heading data.
Industrial-Grade Design
Features dual independent serial interfaces supporting 3.3V TTL and RS232 levels. Wide voltage input (3~5.5V DC) and industrial temperature range (-35°C ~ +80°C) ensure reliable operation in harsh conditions.
Product Advantages
Full-System Support
Supports BDS, GPS, GLONASS, Galileo, QZSS, SBAS. 1408 channels deliver 0.2°/m baseline heading accuracy.
High-Speed Response
Quad-Mode RTK with up to 20Hz output rate meets real-time requirements of high-speed platforms.
Flexible Integration
Dual serial ports configurable for data output/differential input, supporting 4800-921600 baud rates.
Compact & Robust
66x45mm compact size with standard GH1.25 connectors and SMA interfaces, ideal for OEM applications.
Upgrade your project with centimeter-level performance - inquire about DALANG AK372W today.
About Us
DALANG is a dedicated manufacturer of high-performance GNSS modules and RTK positioning solutions, serving industries such as UAV navigation, precision agriculture, and geospatial mapping. With a clear focus on accuracy, reliability, and integration flexibility, we support both standard and custom applications across global markets. Our product lines are engineered to meet the evolving demands of real-time positioning with support for multiple GNSS constellations, including GPS, GLONASS, BDS, and Galileo.
Our production facility spans 2,500㎡ and includes advanced SMT lines, in-house R&D labs, and full functional testing for every unit shipped. With a team of 30+ GNSS engineers, we design and manufacture over 200,000 GNSS receivers and modules annually. Certified to ISO9001:2015, and compliant with CE and RoHS standards, we follow a strict quality assurance process from prototyping through mass production. We also provide firmware updates, system integration support, and full lifecycle product documentation.
Trusted by partners in over 30 countries, DALANG delivers fast, scalable manufacturing with personalized technical support. Our streamlined collaboration model—covering inquiry, consultation, prototyping, and delivery—ensures efficiency from first contact to deployment. Whether you're sourcing off-the-shelf GNSS hardware or launching a customized solution, DALANG is your dependable partner for accurate, cost-effective positioning systems.
FAQ
1. Who are we?
We are DALANG, a specialized manufacturer of GNSS modules and RTK positioning systems based in China, with a focus on high-precision solutions for UAVs, surveying, and smart agriculture.
2. How can we guarantee quality?
All products undergo strict multi-stage quality control, including SMT production, functional testing, and 100% final inspection. We are ISO9001:2015 certified and follow international compliance standards such as CE and RoHS.
3. What can you buy from us?
You can purchase GNSS receivers, RTK modules, base stations, antennas, flight control positioning systems, and other GNSS-related components and accessories.
4. Why should you buy from us not from other suppliers?
We combine strong in-house R&D, flexible OEM/ODM support, industrial-grade quality assurance, and fast global delivery. Our expertise in GNSS RTK ensures stable, accurate, and scalable solutions tailored to your specific use case.
5. What services can we provide?
We offer OEM/ODM customization, technical consulting, firmware support, prototyping, and global after-sales service. Our team works closely with international clients to ensure efficient communication and long-term support.
