KUON Tools
Free, no-account GNSS / positioning utilities: the interoperability bridge for surveyors, precision-agriculture and drone / robotics developers.
🛰GNSS
RINEX Converter
Convert receiver raw logs (u-blox .ubx RXM-RAWX, RTCM3, SBF) to RINEX. RTKLIB convbin backend; files auto-delete after 24h.
Raw GNSS → RINEX →
📈GNSS
RINEX Viewer
Open a RINEX observation (.obs) file and see satellite availability over time. Header summary, SNR. Fully client-side.
Inspect RINEX obs →
🔄Convert
GNSS Track Converter
Convert NMEA, .ubx, GPX, KML, GeoJSON and CSV between each other. Get a GPS track into Google Earth / QGIS.
NMEA/UBX/GPX/KML/GeoJSON/CSV →
🗜GNSS
RINEX Hatanaka
Compress / decompress RINEX observations with the Hatanaka format (.crx ⇄ .obs). RNXCMP (GSI). Supports IGS .crx/.d.
crx2rnx / rnx2crx →
🔍GNSS
RINEX QC
Basic quality check of RINEX / CRINEX: epoch count, gap %, satellites per constellation. IGS .crx auto-decompressed.
epochs, gaps, per-system →
📍GNSS
Coordinates
Convert one point between WGS84, DMS, UTM, MGRS, Japan Plane Rectangular (JGD2011), geohash, Plus Codes and ECEF, and measure distance and area. Conversion and measurement run on your device; only a place-name search and the elevation lookup send the name or the point to our server. No files are sent.
WGS84 / UTM / MGRS / JGD2011 →
🚁MAP
Drone Check
Is the spot inside a Densely Inhabited District or an airport area? Pick a point and see. The check runs on your device: the area data for the region is loaded, and the point itself is not sent.
Can I fly here? →
🗺MAP
KUON MAP
Live RTK base-station map, cm-scale log plotting, satellite visibility (KUON SKY), baseline checker, coordinates / geoid / declination, rain radar.
The live GNSS map →
📡GNSS
RTK Stations
Ranks the world’s goodwill RTK base stations by richness score × uptime. Every station has a permanent page and a live SVG badge.
RTK base station board →
🌍SKY
KUON ORBIT
Real-time SGP4 tracking of GNSS satellites (GPS/GLONASS/Galileo/BeiDou/QZSS), the ISS and Starlink.
Live satellite tracking →
🚏NEXT
KUON GEO NEXT
For visitors: how many minutes until the next bus and boat from a place in Japan. Live positions and delays from the operators, boats from their timetables. Hiroshima first.
Next bus and boat, live →
Coming soon
- Advanced QC (cycle slips, multipath / Anubis)
- RINEX version conversion (2.11 ↔ 3.04 ↔ 4.0)
- Batch coordinate transform (CSV → any CRS)
RINEX Viewer and the track converter run on your device and send no files. RINEX Converter, Hatanaka and QC are processed on our server and deleted after 24 hours. No account for any of them. New to this, or wondering “what is RTK?”: see the FAQ. feedback
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