Online Tool Store
Satellite Pass Predictor (Manual TLE)
Paste a satellite's TLE data and your location to predict its next visible pass, including timing, duration, and maximum elevation. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Example
Satellite Pass Predictor (Manual TLE)
Sample: ISS (ZARYA) TLE
Example shown — replace it with your own TLE data and location.
1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9008 2 25544 51.6416 339.0225 0006317 55.2454 304.9153 15.49560936
Result
How it works
- Paste a satellite's TLE data.
- Enter your observing location.
- See the next predicted visible pass with timing and elevation.
The method
Standard orbital propagation from the TLE data is combined with your location to estimate when the satellite will be visible overhead, its duration, and maximum elevation.
FAQ
What is a TLE?
A Two-Line Element set, a standardized format describing a satellite's orbit at a specific point in time, published by tracking organizations like NORAD/CelesTrak.
Where do I get a satellite's TLE data?
Public sources like CelesTrak and Space-Track publish current TLE data for tracked satellites, including the ISS and many others.
Why does TLE data need to be recent?
Orbital predictions drift in accuracy the older the TLE gets — for a reliable pass prediction, use TLE data that's no more than a few days old.
How we compare
| Feature | Online Tool Store | Satellite tracking app | Manual orbital calculation |
|---|---|---|---|
| No software install | Yes | No | Yes |
| Quick to start | Yes | Setup required | Very slow |
| Free to use | Yes | Often paid | Free |
For a quick pass prediction from TLE data you already have, this skips installing a dedicated tracking app.