Long March 3B rocket makes dual launch of two Beidou craft

At 2050 on 29 April, a Chinese Long March 3B launched two Beidou spacecrat from Xichang using a new large fairing and a dual satellite adapter.  This is the first dual launch of two major payloads for the launch vehicle.   The satellites, Beidou 2C-M3 and Beidou 2C-M4 are part of the Chinese equivalent of the US GPS navigation satellite system albeit that users have to actively interrogate the system rather than receive signals passively as with GPS.