It was the first time the nation successfully launched two navigation satellites on one rocket into a medium-high earth orbit of about 20,000 kilometres – a difficult feat.
Professor Jiao Weixin, from Peking University’s School of Earth and Space Sciences, said the mission required greater transport ability and technical precision. “China has previously launched three satellites on one carrier rocket” into geostationary orbit of about 36,000 kilometres, he said.
But those were lighter balloon satellites inflated with gas after being sent into orbit, and they did not have to be so carefully aligned.
“That was not as technically challenging as this mission,” said Jiao.
View original post 267 more words