The asteroid exploration opportunities are searched and calculated with launch dates in 2006 to2010, and with asteroid Ivar 1627 as the target, the spacecraft and its subsystems are designed and analyzed,and the trans...The asteroid exploration opportunities are searched and calculated with launch dates in 2006 to2010, and with asteroid Ivar 1627 as the target, the spacecraft and its subsystems are designed and analyzed,and the transfer trajectory is designed using △VEGA technology for the asteroid rendezvous. The design resultssatisfied the energy requirements for small explorers.展开更多
China's first data relay satellite Tianlian 1-01 has been operating for more than six years,fulfilling all missions within its designed lifetime.Development of the satellite began in 2003.It was launched on April ...China's first data relay satellite Tianlian 1-01 has been operating for more than six years,fulfilling all missions within its designed lifetime.Development of the satellite began in 2003.It was launched on April 25,2008 and delivered to the customer on December 4 the same year.During its in-orbit operation,Tianlian 1-01 operates stably.It completed the first in-orbit tracking and data relay mission for the Shenzhou 7 spaceship,beginning the application of China's data展开更多
文摘The asteroid exploration opportunities are searched and calculated with launch dates in 2006 to2010, and with asteroid Ivar 1627 as the target, the spacecraft and its subsystems are designed and analyzed,and the transfer trajectory is designed using △VEGA technology for the asteroid rendezvous. The design resultssatisfied the energy requirements for small explorers.
文摘China's first data relay satellite Tianlian 1-01 has been operating for more than six years,fulfilling all missions within its designed lifetime.Development of the satellite began in 2003.It was launched on April 25,2008 and delivered to the customer on December 4 the same year.During its in-orbit operation,Tianlian 1-01 operates stably.It completed the first in-orbit tracking and data relay mission for the Shenzhou 7 spaceship,beginning the application of China's data
