丨 Product IntroductionAK721-JM, a GNSS module with multi galaxy support and dual frequency technology, has ultra-high sensitivity and can accurately capture satellite signals even in weak signal areas.
characteristic:1. Multi star system: supports GPS, GLONASS, Galileo, BDS, QZSS, with multiple signal sources, more stable positioning, and a wide range of available scenarios.
2. High sensitivity: The capture and tracking sensitivity is high, and it can also locate complex environments (such as weak signal areas).
3. Quick cold start: The hot start takes only 1 second, while the AGNSS fully starts in 5 seconds, allowing for quick position acquisition.
4. High precision: RTK mode has high horizontal and vertical accuracy, and also performs well in single point positioning, meeting the needs of surveying and mapping.
5. Low power consumption: Backup mode has extremely low power consumption, which is beneficial for battery powered devices to have long battery life.
丨 Specification parameters
|
Chip
characteristics
|
Operating Frequency
|
GPS L1 C/A L5
GLONASS L1 L5
Galileo E1 E5a
BDS B1I B2a
QZSS L1 C/A L5
|
|
Default galaxy
|
GPS+GLONASS +Galileo+BDS+QZSS
|
|
Sensitivity
|
capture
|
-145dBm
|
|
Re capture
|
-157dBm
|
|
track
|
-165dBm
|
|
Time To First Fix
|
TTFF
(AGNSS closed)
|
Completely cold start
|
26s
|
|
warm start
|
16s
|
|
hot start
|
1s
|
|
TTFF
(AGNSS enabled)
|
Completely cold start
|
5s
|
|
Single point positioning
|
Level: 1.5mCEP
|
|
Vertical: 2.5mCEP
|
|
RTK
|
Level: 1.0cm+1ppmCEP
|
|
Vertical: 1.5cm+1ppmCEP
|
|
speed accuracy
|
0.03m/s CEP
|
|
Timing accuracy
|
20ns RMS
|
|
Operation
restrictions
|
maximum height
|
10000m
|
|
maximum speed
|
500m/s
|
|
Maximum acceleration
|
4g
|
|
Output data
|
Baud rate
|
115200-921600bps(default 115200bps)
|
|
output interface
|
TTL
|
|
Output Protocol
|
NMEA0183 / RTCM3.X
|
|
update frequency
|
Default 1Hz（1Hz-10Hz）
|
|
Power
consumption
|
capture
|
30mA(99mW)
|
|
track
|
30mA(99mW)
|
|
Backup mode
|
25μA(82.5μW)
|
|
Electrical and
Physical
|
working voltage
|
3.3V~5.5V DC（typical 5.0V）
|
|
size
|
φ36*11.7mm
|
|
weight
|
32.4g
|
|
joint
|
GH1.25mm 6pin
|
|
Environment
|
operation temperature
|
-40℃-85℃
|
|
storage temperature
|
-40℃-85℃
|
|
Compass
|
|
IST8310
|
丨 measured data
Packaging and Delivery：
High-Performance GNSS Module for Drones and Precision Agriculture
AK721-JM is a multi-constellation, dual-frequency high-precision GNSS receiver module that fully supports GPS, GLONASS, Galileo, BDS, and QZSS systems. Equipped with L1/L5 dual-frequency technology, it delivers stable and reliable centimeter-level positioning even in challenging environments such as urban canyons and forested areas. It is an ideal solution for applications including drone navigation, precision agriculture, intelligent transportation, and industrial surveying.
Rapid Response and High-Sensitivity Positioning
With an ultra-high tracking sensitivity of -166 dBm, the AK721-JM achieves a cold start in as fast as 5 seconds (with AGNSS enabled) and a hot start in just 1 second. Whether installed in high-speed drones or ground-based agricultural machinery, it quickly acquires and maintains positioning to ensure efficient and continuous operation.
Optimized for Integration and Industrial Applications
Compatible with mainstream open-source flight control systems such as ArduPilot and PX4, and featuring a standard TTL interface with support for NMEA and RTCM protocols, the AK721-JM can be easily integrated into various UAVs, AGVs, and vehicle systems. Its modular design and industrial-grade environmental adaptability make it a reliable choice for system integrators and developers.
Stable Performance in Harsh Environments
With an operating temperature range of -40°C to 85°C, a maximum altitude of 10,000 meters, and strong anti-interference capabilities, the AK721-JM maintains stable positioning and reliable data output in diverse complex scenarios, including mountainous terrain, urban skylines, and dense foliage.
Product Advantages
Multi-Constellation + Dual-Frequency Positioning
Supports five major satellite systems and L1/L5 frequency bands, delivering high availability and high-precision positioning.
Fast Startup & High Sensitivity
Cold start in 5 seconds, hot start in 1 second, and -166dBm tracking sensitivity ensure stable performance even in weak signal areas.
Centimeter-Level RTK Accuracy
Horizontal accuracy of 1cm+1ppm meets the demands of surveying, UAVs, and precision agriculture operations.
Industrial-Grade Robust Design
Wide temperature tolerance, vibration resistance, and high-altitude adaptability make it suitable for various outdoor and industrial applications.
Demanding centimeter-level accuracy for mission-critical applications? Integrate the DALANG AK721-JM GNSS module—the reliable foundation for your UAV, AGV, and precision agriculture systems.
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.
