Wikipedia
I-RTK
I-RTK is a flexible, high-performance GPS/BDS receiver.
Features:
Centimeter accurate relative positioning (Carrier phase RTK).
10 Hz position/velocity/time solutions.
Small form factor - 50x50mm.
USB and dual UART connectivity.
Integrated patch antenna and external antenna input.
u-blox 6T/8T receiver.
Integrated 100mW Radio, using Lora mode.
1pps output.
Applications:
Autonomous vehicle guidance,e.g. UAV formation flight and autonomous landing.
GPS/GNSS research.
Software:
"i-RTK controller" is a software for setting and watching the i-RTK. It can also be used to update the firmware of the i-RTK.