N2YO and Orbital Radar show in the browser where satellites are now and when they pass overhead. They calculate with the same public orbital data (TLE) as in 10.1. What you can do with each:
| What you want to do | N2YO | Orbital Radar | Background |
|---|---|---|---|
| See where a satellite is now | ISS live | ISS tracker | 2.1 |
| Predict passes over a place | What's up? | Pass predictions | 10.1 |
| Navigation constellations | GPS, GLONASS, Galileo, BeiDou | GPS, Galileo | 3.3 |
| Proliferated LEO (Starlink) | Starlink | Starlink tracker | 2.8 |
| Military and weather satellites | Military, Weather | — | 3.1 |
| Look up an object by catalogue number | Database | — | 10.3 |
| Follow manoeuvres and re-entries | — | Manoeuvres, re-entries | 10.3 |
| Space debris | — | Debris map, statistics | 6.6 |
| Space weather | — | Space weather | 3.8 |
| Launches | — | Launch schedule | 1.4 |
| Look up orbit types | — | Types of orbits | 2.1 |
Look up the ISS and note its altitude, speed and orbital period. Enter the same altitude in the orbit widget in 2.1: do the values match? Then look up a GPS satellite and explain the difference in speed.
Both sites only show what is in public catalogues: classified satellites are missing or listed with outdated data, and a recent manoeuvre only shows up after a new measurement. Use them for practice and to check claims, not as an operational source. Pass predictions ask for a location: enter a town name, not the exact position of a unit. An account (optional on Orbital Radar) is not needed for these exercises.