BY SPACEFLIGHT NOW March 18, 2001 -- Follow the countdown and flight of the Sea Launch Zenit 3SL rocket with the first XM Satellite Radio broadcasting spacecraft. Reload this page for the very latest on the mission.				Flight Data File Vehicle: Zenit 3SL Payload: XM-2 ("Rock") Launch date: March 18, 2001 Launch window: 2233-2318 GMT (5:33-6:18 p.m. EST) Launch site: Equator, 154° West, Pacific Ocean Satellite broadcast: Telstar 5, Transponder 24, C-band