Sensors & Hardware
How GNSS Works and Key Products — u-blox, Trimble, Fixposition
RTK combines satellite positioning with correction data from a base station, shrinking the several-meter error of standalone GNSS positioning down to centimeter level. We work through how dual-frequency positioning cancels ionospheric delay, how u-blox's ZED-F9P drove low-cost RTK into the mainstream, Trimble RTX and Japan's own Michibiki (QZSS), and the real-world example of Kubota's nationwide network of 342 RTK base stations for farm machinery — and how each of these changes what positioning accuracy you actually get.