The first satellite of the second-generation system, Compass-M1 was launched in 2007. It was followed by further nine satellites during 2009-2011, achieving functional regional coverage. A total of 16 satellites were launched during this phase.
The first satellite of the second - generation system , Compass - M1 was launched in 2007 . It was followed by further nine satellites during 2009 - 2011 , achieving functional regional coverage . A total of 16 satellites were launched during this phase .
What was achieved by launching 9 additional satellites from 2009-2011?
What was achieved by launching 9 additional satellites from 2009 - 2011 ?
functional regional coverage
functional regional coverage