CD Radio 1, also known as Radiosat 1, was an American communications satellite which was operated by Sirius XM Radio, previously Sirius Satellite Radio. It was constructed by Space Systems Loral and was based on the LS-1300 satellite bus. Launch occurred on 30 June 2000, at 22:08 GMT. The launch was contracted by International Launch Services, and used a LV Proton K rocket flying from military pad Site 81/24 at the military polygon Baikonur Cosmodrome. In 2016, the satellite was decommissioned and placed into a disposal orbit.