丨 Product Introduction
1. Advanced technology positioning: Based on UBX-M9140, stable and accurate positioning in extreme environments.
2. Four mode fusion positioning: compatible with multiple global positioning systems, seamless global positioning.
3.25Hz high-speed output: fast data output, suitable for dynamic applications.
4. Ceramic antenna characteristics: 18 * 18 * 4 ceramic dual polarization, strong anti-interference and good signal.
丨 Specification parameters
|
Specification parameters
|
|
Chip
characteristics
|
1
|
chip
|
UBX-M9140
|
|
2
|
Signal channel
|
92-channel
|
|
3
|
working frequency
|
GPS: L1 C/A,
QZSS: L1 C/A/S,
GLONASS: L10F，
BeiDou: B1I,
Galileo: E1B/C ，
SBAS L1 C/A: WAAS, EGNOS, MSAS, GAGAN
|
|
4
|
Time pulse frequency
|
0.25Hz-25Hz(default 1Hz)
|
|
5
|
Time pulse signal accuracy
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RMS：30ns
|
|
99% ：60ns
|
|
6
|
Horizontal
position accuracy
|
1.5m CEP (with SBAS)
|
|
2.5m CEP (without SBAS)
|
|
7
|
Start Time
|
Cold start: 24 seconds
|
|
Warm start: 2s
|
|
Hot start: 2s
|
|
8
|
sensitivity
|
Tracking:- 167 dBm
|
|
Re capture:- 160 dBm
|
|
Cold start:- 148 dBm
|
|
Hot start:- 159 dBm
|
|
9
|
Speed accuracy
|
0.05m/s
|
|
10
|
Baud rate
|
38400bps (default) [Optional: 4800-921600]
|
|
11
|
Output Protocol
|
NMEA-0183、RTCM 3.3、UBX
|
|
12
|
Output level
|
TTL
|
|
13
|
Extreme working state
|
Gravity acceleration limit: 4g
|
|
Height limit: 80,000m
|
|
Speed limit: 500m/s
|
|
Antenna
characteristics
|
1
|
Antenna specifications
|
18*18*4
|
|
2
|
Maximum gain of antenna
|
2.5dBi
|
|
|
3
|
Polarization mode
|
RHCP
|
|
4
|
Noise coefficient
|
≤0.8dB
|
|
5
|
LNA gain
|
L1：20±2dB
|
|
Working
characteristics
|
1
|
working voltage
|
3V-5.5V DC(Typical value: 5.0v)
|
|
2
|
power waste
|
<100mW @5V
|
|
3
|
size
|
20*22*7.5mm
|
|
4
|
weight
|
8.6g
|
|
5
|
Connector
|
GH1.25 4pin
|
|
6
|
working temperature
|
-35℃-75℃
|
|
7
|
Storage temperature
|
-40℃-85℃
|
Table 1 Interface Definition
|
PIN name
|
describe
|
|
VCC
|
Power input, DC+5V
|
|
RXD
|
GPS serial input, 3.3V TTL
|
|
TXD
|
GPS serial port output, 3.3V TTL
|
|
GND
|
GND
|
High-Performance GNSS Navigation and Positioning Module
The DL20U9A integrates the advanced UBX-M9140 GNSS chip with a high-performance dual-polarized ceramic antenna, capable of simultaneously tracking signals from four major satellite navigation systems. Maintaining stable and reliable positioning performance even in complex urban environments, it is suitable for automotive navigation, industrial tracking, UAVs, and other intelligent mobile platforms.
Stable Positioning Performance
Supports combined positioning from BeiDou, GPS, GLONASS, and Galileo systems, featuring a 25Hz high data output rate to meet real-time positioning requirements for dynamic applications. With 92 signal reception channels and tracking sensitivity of -167dBm, it ensures stable performance in weak signal environments.
Optimized Antenna Design
Incorporates an 18×18×4mm dual-polarized ceramic antenna with advantages of light weight, high gain, and anti-interference capability. The carefully designed antenna combination improves signal reception quality and ensures positioning stability in changing environments.
Industrial-Grade Reliability
Utilizes industrial-grade low-noise RF design to enhance anti-multipath interference capability, ensuring clear signal acquisition even in high-noise environments. Operating temperature range of -35℃ to 75℃ adapts to harsh environment applications.
Easy Integration
Compatible with mainstream flight control systems including Pixhawk and APM, providing extensive application flexibility and integration convenience. Compact 20×22×7.5mm size weighing only 8.6g with GH1.25 4pin connector, suitable for space-constrained devices.
Core Advantages
Multi-System Stable Positioning
Four-system combined calculation ensures reliable positioning performance
High Data Output Rate
25Hz data output meets dynamic application requirements
Quality Antenna Performance
Dual-polarized ceramic antenna delivers good signal reception
Industrial-Grade Quality
Anti-interference design ensures stable operation in complex environments
Choose DL20U9A today and crush your competitors with superior positioning performance!
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.
