丨 Product IntroductionProduct Introduction：
The AK996 is a low-cost, low-power RTK module that delivers centimeter-level accuracy using carrier phase technology. Suitable for drones, vehicles, and surveying, it operates as both base or rover station, supports standard RTCM, and achieves up to 2cm accuracy at 1-20Hz output.Features：
1.Full-frequency RTK + dual-antenna tech: Built on UM982 design, it supports full-frequency RTK positioning and dual antennas, delivering stable, high-precision positioning even in harsh environments.
2.Multi-system frequency support: Compatible with satellite navigation systems (BDS, GPS, etc.), greatly enhancing global positioning coverage and accuracy.
3.Dual RTK technology: Uses dual RTK engines and dual antenna inputs to boost signal processing redundancy and stability, improving positioning reliability and precision.
4.20Hz data output rate: Features high-performance processing, adapting quickly to dynamic scenarios—ideal for applications like drones that need fast positioning updates.
5.Industrial-grade low-noise RF circuit: Boasts strong signal processing capabilities, effectively suppressing multipath interference to ensure signal clarity and positioning accuracy.
丨 Product Structure
PIN Foot Function
|
NO.
|
signal name
|
Signal Description
|
|
1
|
VCC
|
Power input, DC+5V
|
|
2
|
GND
|
grounding
|
|
3
|
RX1
|
Main serial port (COM1) data transmission, output NMEA0183 format positioning results when configured as "mobile station", and output RTCM2. x/3. x format differential data stream when configured as "reference station".
|
|
4
|
TX1
|
Main serial port (COM1) data reception, configure command input port.
|
|
5
|
RX2
|
COM2 output interface
|
|
6
|
TX2
|
COM2 differential serial port (COM2) data input, only valid when configured as "mobile station", accepts RTCM2. x/3. x format differential data input.
|
|
7
|
TYPE-C interface
|
COM3 output interface
|
|
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)
|
20ns
|
|
Speed accuracy (RMS)
|
0.2m/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
|
|
First positioning time TTFF
|
cold boot
|
＜ 20s
|
|
Initialization time
|
<5s (typical value)
|
|
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
|
|
Environment
|
working temperature
|
-35℃-80℃
|
|
Storage temperature
|
-40℃-85℃
|
|
Electrical
specifications
|
working voltage
|
5V DC
|
|
power waste
|
<800mW
|
|
Physical
parameters
|
size
|
42*29*13mm
|
|
weight
|
24.6g
|
|
Shell material
|
aluminium
|
|
Connector
|
TYPE-C/ GH1.25mm 6pin
|
|
Antenna connector
|
SSMB*2
|
Packaging and Delivery：
