SUMMARY: A Zenit-3SL rocket roared up from Sea Launch this morning, delivering a replacement satellite for XM Satellite Radio. The rocket lifted off at 0351 GMT (10:51 pm EST Monday), and the XM-3 satellite reached its geosynchronous transfer orbit about an hour later. The launch had been delayed several times because of poor weather and ocean conditions at the launch site in the middle of the Pacific Ocean.

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