China postpones launch of Beidou global navigation satellite

A Long March 3B rocket stands upright on a launch pad at the Xichang space base.
A Long March 3B rocket stands upright on a launch pad at the Xichang space base. (Image credit: CGTN)

China will have to wait to finish a long-awaited upgrade of its global navigation satellite system.

The final Beidou Navigation Satellite-3 (BDS-3) launch, planned for Tuesday, June 16 Beijing time and GMT (late Monday, June 15 in EDT) was delayed due to technical issues with the rocket, Chinese state media service Xinhua reported. More details were not made immediately available.

"The Long March-3B carrier rocket to be used to launch the BDS-3 satellite was found having technical problems during pre-launch tests, according to the China Satellite Navigation Office," Xinhua reported at 8:15 a.m. Beijing time Tuesday (8:15 p.m. EDT Monday or 0015 GMT Tuesday), about two hours before the scheduled launch window was supposed to open. "The launch previously scheduled for Tuesday has been postponed, and the new launch time is to be determined."

Related: Latest news about China's space program

China typically makes launch announcements after the satellite deploys successfully in orbit. This time, however, an English broadcast was announced for state service provider CCTV, which normally provides video clips after successful launches.

The last BDS-3 satellite was supposed to depart from the Xichang Satellite Launch Center, which is located in the southwestern Sichuan province. Chinese news sources previously said that finding a suitable launch date had been difficult because of the rainy season in the mountainous region, which can create challenging launch conditions as weather changes quickly in the area. 

Upgrades to the BDS system began in 2009, Xinhua said in another report from May. Once completed, BDS-3 is expected to include 30 satellites (there are now 29 operational satellites) for applications ranging from high-precision positioning to short message communications. 

Compared to the older BDS-2 generation, BDS-3 satellites have "higher bandwidth, enabling enhanced communication capability and carrying more accurate … atomic clocks to improve the precision of timing and navigation services," China's Global Times said in a report about the launch before it was postponed. BDS-3 has been operational since 2018, but this latest launch is expected to improve the signal strength and coverage for users around the world.

Navigational satellites like those in BDS-3 work by transmitting a signal that is picked up by receivers in smartphones and other Global Positioning System (GPS)-enabled devices. The satellite signal includes information such as the time the message was sent (making atomic clocks quite useful for exact measurements) as well as the satellite's orbital position. Navigation can proceed when a user receives accurate information from at least four satellites.

China's delay in finishing the BDS-3 network comes as the United States faces challenges in launching new satellites to modernize its own navigation network, GPS. The novel coronavirus pandemic forced the next GPS III satellite launch to delay to at least June 30 from a planned April launch. GPS III satellites have three times the navigational accuracy and an up to eight-fold improvement on anti-jamming capabilities over the older GPS II network. The GPS network is set to be fully upgraded by 2023.

There are two other global navigation systems competing with China's. Russia launched the Glonass-M navigation satellite into orbit in March, providing services for Russia's military services on land, air and sea. Europe's Galileo system became operational in 2016 and is expected to add its last satellites late in 2020, according to the European Space Agency.

Follow Elizabeth Howell on Twitter @howellspace. Follow us on Twitter @Spacedotcom and on Facebook

OFFER: Save 45% on 'All About Space' 'How it Works' and 'All About History'!

OFFER: Save 45% on 'All About Space' 'How it Works' and 'All About History'!

For a limited time, you can take out a digital subscription to any of our best-selling science magazines for just $2.38 per month, or 45% off the standard price for the first three months.

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at:

Elizabeth Howell
Staff Writer, Spaceflight

Elizabeth Howell (she/her), Ph.D., is a staff writer in the spaceflight channel since 2022 covering diversity, education and gaming as well. She was contributing writer for for 10 years before joining full-time. Elizabeth's reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, "Why Am I Taller?", is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada's Carleton University and a Bachelor of History from Canada's Athabasca University. Elizabeth is also a post-secondary instructor in communications and science at several institutions since 2015; her experience includes developing and teaching an astronomy course at Canada's Algonquin College (with Indigenous content as well) to more than 1,000 students since 2020. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: