2 cm-level positioning
RTK correction from a base station lifts coordinate precision far above ordinary GPS, which is accurate to around 10 m.
HIGH-PRECISION BUS POSITIONING
Position data moves from
Same bus,
Ordinary GPS ~10 m
The same baseline
Position data moves from
10 m to 2 cm
A high-precision GNSS module under the driver's seat. RTK correction changes the baseline of the coordinate itself.
Same bus,
different accuracy
The more accurate the position data, the more accurate the arrival estimate. The quality of bus information starts at the coordinate.
Ordinary GPS ~10 m
High-precision ~2 cm
Collected from the same bus, the precision of the coordinate is not the same. We raised the baseline in order to deliver more accurate bus information.
The same baseline
everywhere
On-board units receive correction data from base stations in real time, so bus information is held to the same standard in every region.
MAIN PRODUCT
High-Precision GNSS Module
Built to deliver more accurate bus information: RTK correction raises the baseline of the position data from roughly 10 m to roughly 2 cm, on modules from u-blox, the global leader in compact high-precision GNSS.
GPS module
Uses modules from u-blox, the worldwide leader in compact high-precision GNSS, for accuracy and reliability.
RTK correction
Registered as SANGLIM_GNSS_RTK (OBE, BASE) — on-board equipment paired with a base station.
KC electromagnetic compatibility
Passed KC EMC testing, protecting the safety of drivers and passengers on board.
LED status indicator
Status LEDs show upgrade progress and operating state right there on site.
LIVE NETWORK
One network, nationwide
Correction signals exchanged between base stations and vehicle units. Each dot is one positioning point.
- Base stationGenerates correction data from a fixed known coordinate
- On-board unit (OBE)Mounted on the bus, receives and applies the correction
- Correction linkReal-time correction delivered over the LTE network
The film illustrates how high-precision bus positioning works. Achieved accuracy varies with baseline distance to the base station and reception conditions.
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