KUON RINEX Viewer
Open a RINEX observation file and see satellite availability over time: free, no account, in your browser.
Satellite availability rows = satellites, x = time, colour = constellation
Visible satellites over time
RINEX (.obs) is raw observation data used for survey post-processing. This viewer inspects its contents in the browser (like RTKPLOT): it does not judge conversion accuracy. The file is processed only on this device and never sent anywhere.
Currently supports <b>RINEX 3.x</b> observation files (the converter default is 3.04). ← Convert .ubx/RTCM3/SBF to RINEX ・ KUON MAP
What you are looking at
The timeline shows, for every satellite, when it was actually observed. A solid band means the receiver tracked it without a break. A gap means it lost it.
This is the fastest way to answer the question that matters after a session: was this observation any good?
Reading the gaps
Gaps that appear on every satellite at the same moment are the receiver, the cable or the power. Something interrupted the whole unit.
Gaps on individual satellites, appearing and clearing as they move, are the sky. A building, a tree or a slope was in the way.
Bands that start late are satellites rising. Bands that stop early are satellites setting. Those are normal.
Signal strength
Strength above 40 is healthy. Below 30 a satellite contributes little, and near the noise floor it will hurt more than it helps.
A satellite that is present the whole time but weak throughout is often reflection rather than a direct signal.
Nothing opens
This reads observation files (.obs). A navigation file (.nav) holds satellite orbits, not measurements, so there is nothing to draw.
Hatanaka-compressed files (.crx, .??d) must be expanded first. Raw receiver logs have to be converted to RINEX first.