A few websites provides online orbital data of radio amateur satellites passes.
It usually suffices to enter your location and the website provides immediate information about the next passes.
The site of AMSAT Argentina gives all radio amateur satellites passes for your selected location.
As an example, below the URL for locator JO21ed ( latitude N 51.1308 – longitude E 4.3849 )
The site Heavens – Above provides all radio amateur satellites passes for your selected location.
- AMSAT Online Satellite Pass Predictions
You can calculate for a selected satellite the first followed passages on the AMSAT website.
Provide your latitude, longitude and elevation or calculate them from your grid square.
If you choose the website will save your position information in a cookie on your system for future predictions.