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[b]Progress undocks for automated rendezvous test[/b] The Progress M-21M resupply craft separated from the International Space Station at 3:58 a.m. CDT (0858 GMT) on Wednesday (April 23) and completed its first engine fire to move it a safe distance away. The Progress will position itself about 311 miles (500 km) away from the orbiting outpost, where it will begin to reapproach the station. The spacecraft is scheduled to re-rendezvous with the space station on Friday (April 25). Redocking with the Zvezda service module is scheduled for 7:15 a.m. CDT (1215 GMT). Progress M-21M will rendezvous with a new system, known as Kurs-NA. Kurs-NA uses only a single antenna, allowing four others to be removed, leaving only three or half as many as current versions of the spacecraft. Kurs-NA also will use less power, improve safety and possess updated electronics.
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