>
http://en.wikipedia.org/wiki/Sirius_Radio
>
> Sirius’ spacecraft Radiosat 1 through Radiosat 4 were
> manufactured by Space Systems/Loral. The first three of the
> series were orbited in 2000 by Proton-K Block-DM3 launch
> vehicles. Radiosat 4 is a ground spare, in storage at
> SS/Loral’s facility in Palo Alto, California. The series of
> satellites from which they come, the SS/Loral LS-1300, is
> known to have problems with their solar array cells — a
> similar issue affects the Boeing satellites belonging to XM
> Radio.
>
> Sirius' satellites are called Radiosat (instead of after the
> company name), due to there already being a previous fleet
> of satellites launched also named SIRIUS, launched by
> Sweden's NSAB (Nordiska Satellitaktiebolaget, or Nordic
> Satellite AB) and used for general telecommunications and
> satellite tv throughout Sweden and the rest of Scandinavia.
>
Ok, clear. But I would like to track this satellites on
http://science.nasa.gov/Realtime/JTrack/3d/JTrack3D.html but I can't find a satellite called radiosat 1/4.
I only see the XM satellites 'rock' and 'roll'.