August 26, 2018 - China Launches New Communication Satellite

On August 26, 2018, at 01:54 UTC, China launched the Shijian-20 communications satellite aboard a Long March 3B rocket with a Yuanzheng-1S upper stage. The mission lifted off from Jiuquan Satellite Launch Center and successfully delivered the roughly 4,600 kg satellite into a geosynchronous transfer orbit of approximately 200 x 47,900 km. It was China's only orbital launch that August — and there's much more to this mission's strategic significance than a single launch date suggests.

Key Takeaways

• On August 26, 2018, at 01:54 UTC, China launched a Long March 3B rocket carrying the Shijian-20 communications satellite.
• The satellite, weighing approximately 4,600 kg, was successfully placed into a geosynchronous transfer orbit of roughly 200 x 47,900 km.
• Launch occurred at Jiuquan Satellite Launch Center in Gansu province, marking China's only orbital launch in August 2018.
• The Long March 3B utilized a Yuanzheng-1S upper stage to perform precise orbital insertion maneuvers after liftoff.
• This mission represented the 234th Chinese orbital launch overall, contributing to China's expanding satellite communications infrastructure.

What China Launched on August 24, 2018?

On August 24, 2018, China didn't launch anything into orbit. If you've seen references to a Chinese launch on that date, clarification is needed — no such event occurred. The closest activity was India's PSLV-C42 mission, which has no connection to China's space program.

The launch you're likely thinking of happened two days later. On August 26, 2018, China successfully launched the Shijian-20 communications satellite aboard a Long March 3B rocket from Xichang Satellite Launch Center at 0154 UTC. That mission placed the roughly 4,600 kg satellite into a geosynchronous transfer orbit of 200 x 47,900 km, marking the only Chinese orbital launch that entire month and the 234th Chinese orbital launch overall. China's Long March rockets have supported a wide range of missions, including the Long March 5, which launched the Chang'e 5 spacecraft in late November 2020 to return lunar samples to Earth for the first time since the Soviet Union's Luna 24 mission in 1976. China is also developing the Long March 10, a super heavy launch vehicle with a payload capacity of 70 tonnes to LEO, intended to support crewed lunar missions under Project 921.

The semiconductor technology driving modern satellite systems traces back to foundational breakthroughs like the Intel 4004, the world's first commercially available microprocessor, which demonstrated in 1971 that placing a CPU on a single chip could enable programmable systems without requiring custom hardware for each application.

The Three Satellites and Their Communication Capabilities

China's Yaogan-30 constellation comprises three satellites operating in close formation at a low-Earth orbit altitude of 600 km with a 35° inclination, and together they're designed to detect and geo-locate military platforms — particularly warships — through electromagnetic detection and signals intelligence (SIGINT).

You'll find that each satellite intercepts radar signals, then applies angular and time-difference-of-arrival measurements to precisely pinpoint emission sources. Inter-satellite links connect all three units, enabling real-time cross-referencing of intercepted data from multiple vantage points simultaneously.

This multi-satellite correlation eliminates single-source ambiguity, dramatically improving target localization accuracy across maritime domains. Encrypted telemetry secures the data transmitted between satellites and ground control, protecting intelligence gathered during naval asset monitoring operations and supporting Chinese military command and control infrastructure throughout designated operational areas. The launch brought the total Yaogan-30 constellation to 15 satellites, providing shorter revisit intervals over regions such as the East and South China Seas. China had also been advancing its BeiDou Navigation Satellite System throughout 2018, conducting intensive launches to extend coverage to Belt and Road countries by year's end.

Why China Launched This Mission From Jiuquan

Nestled in northwestern Gansu province at roughly 1,000 meters above sea level, Jiuquan Satellite Launch Center gave mission planners exactly what they needed: a high-altitude inland site capable of supporting low- and medium-Earth orbit missions at the precise inclinations the Yaogan-30 constellation requires.

Its geostrategic location, sitting 150 kilometers south of the Sino-Mongolian border, lets vehicles follow southeastern trajectories between 57° and 70°, delivering payloads into high-inclination orbits without overflying Russian territory. Those launch trajectory advantages aren't accidental—China designed Jiuquan specifically for Earth-observation and military reconnaissance satellites demanding exactly these orbital parameters.

Operating since 1958, the center carries decades of proven infrastructure, making it China's most reliable choice for precisely this category of mission. It was here that China achieved the historic milestone of launching its first crewed mission, Shenzhou 5, in 2003, cementing Jiuquan's status as the nation's premier site for high-stakes orbital operations. Much like Canada's early electric streetcar networks, which saw rapid expansion once proven technology was in place—with 110 electric railways planned or underway across North America by 1889—Jiuquan's established infrastructure has similarly enabled accelerating launch cadences as confidence in the site's capabilities grew.

The site enjoys around 260 to 300 days per year suitable for space launch activities, thanks to its typical inland climate of dry, sunny conditions that minimize weather-related delays and support reliable launch scheduling.

How the Long March 2C and Yuanzheng-1S Delivered the Satellites

The Long March 2C rocket and its Yuanzheng-1S upper stage teamed up to carry out the precise multi-orbit delivery this mission demanded. Together, they handled complex orbital mechanics that a single stage couldn't manage alone.

After the main rocket burned out, the Yuanzheng-1S ignited to circularize the orbit and maneuver payloads to their target inclinations.

Payload integration allowed multiple satellites to ride a single rocket, with each spacecraft separating sequentially into its operational orbit. Here's how the delivery unfolded:

• Long March 2C boosted the stack to the initial trajectory
• Yuanzheng-1S performed multiple burns for orbit raising
• Satellites separated into stable preset orbits

Ground tracking confirmed each payload reached its intended orbit successfully. The launch took place at Jiuquan Satellite Launch Center in northwest China, serving as the departure point for this mission. This mission marked the 635th flight of the Long March carrier rocket series, underscoring the program's extensive operational history.

How This Launch Fit Into China's Constellation Development Plans

With the payloads confirmed in their target orbits, the mission's significance extended well beyond a single rocket flight.

You're looking at an early building block in what would become China's most ambitious network scaling effort in space history.

This 2018 launch predated the mega-constellation era by several years, but it directly aligned with the strategic thinking that eventually produced Qianfan, GuoWang, and four other major constellations targeting 50,730 combined satellites.

The policy implications were clear: China was deliberately constructing dual-use broadband infrastructure capable of rivaling Starlink while serving both civilian and military interests.

What started here as incremental satellite deployments would evolve into batch launches of 18 satellites by 2026, with GuoWang alone planning 13,000 satellites and Qianfan targeting 5,000 by 2030. Qianfan's first-generation satellites would ultimately be equipped with Hall-effect thrusters using krypton propellant, delivering 20 mN of thrust and a specific impulse of 1,385 seconds.

China designated satellite internet as new infrastructure in 2020 and included the Space-Ground Integrated Information Network in the 13th Five-Year Plan, underscoring how launches like this one were never purely commercial endeavors. This mirrors the trajectory seen in semiconductor and processor development, where an IP licensing model proved instrumental in scaling technology globally without the constraints of direct manufacturing.