The most up-to-date elements for satellite tracking from US Space Command: http://www.space-track.org


The following files are distributed by T.S.Kelso http://www.celestrak.com

To download: shift button and click on link or click the right mouse button and choose "Save as..."

The following links belongs to Nasa Human Spaceflight http://www.spaceflight.nasa.gov/spacenews/index.html

Invaluable to predict ISS and Space Shuttle orbital positions during space manoeuvres