April 7, 2013 - China Launches New Communications Satellite

If you're searching for China's April 7, 2013 satellite launch, you've got the date slightly off. China actually launched the Zhongxing-11 communications satellite on May 2, 2013, at 0:06 a.m. Beijing time. A Long March-3B rocket carried it from Xichang Satellite Launch Center into geostationary orbit at 98.0° East. Built on the DFH-4 platform, it serves voice, broadcast, and broadband users across Asia-Pacific. There's much more to this mission's story worth exploring.

Key Takeaways

• China launched the Zhongxing-11 (ChinaSat 11) communications satellite, with launch dates cited inconsistently as April 7, May 2, or May 4, 2013.
• The satellite was carried by a Long March-3B rocket from Xichang Satellite Launch Center in Sichuan Province.
• Zhongxing-11 was placed into geostationary orbit at 98.0° East, approximately 35,781 km above the equator.
• The spacecraft, built on the DFH-4 platform, carries 26 C-band and 19 Ku-band transponders with a 15-year design lifetime.
• Operated by China Satcom, the satellite provides television, voice, broadband, and data services across Asia, the Middle East, Africa, and Australia.

The Zhongxing-11 Satellite China Launched in April 2013

China launched the Zhongxing-11 communications satellite on May 2, 2013, at 0:06 a.m. Beijing time from Xichang Satellite Launch Center using a Long March-3B rocket. You'll find this satellite, also designated ChinaSat 11, positioned at 98.0° East on the geostationary arc, serving Asia-Pacific users with voice, broadcast, and data services.

Built on the DFH-4 bus, it carries 26 C-band and 19 Ku-band transponders, supporting broad frequency allocation across commercial applications. With a launch mass of 5,234 kg and a 15-year design lifetime, China Satcom operates it as part of a wider ground segment infrastructure. Two deployable solar arrays power the satellite, which features three receiver antennas and two transmission antennas. This mission represented the 176th launch of China's Long March series of rockets. The satellite's communications payload includes five total antennas, comprising three receiver antennas and two transmission antennas configured for its commercial operational role.

How Zhongxing-11 Differed From Standard Communications Satellites

While many geostationary satellites rely on modest transponder counts and standardized power systems, Zhongxing-11 pushed beyond those norms in several key ways.

You'll notice its high power payload stood out immediately — 26 C-band and 19 Ku-band transponders gave it a combined capacity that surpassed typical commercial configurations.

Rather than settling for basic stabilization methods, it used the DFH-4 platform's advanced stabilization and propulsion systems to maintain precise orbital control at 98.0° East.

Its two deployable solar arrays and onboard batteries supported demanding power requirements across its 15-year design lifetime.

It also supported digital broadband multimedia services alongside traditional broadcasting and data distribution, making it more versatile than satellites built for single-purpose roles.

These distinctions made Zhongxing-11 a notably capable asset for Asia-Pacific communications. At the time of its launch, it held the distinction of being the heaviest and most powerful commercial communications satellite ever built in China. It was carried into orbit aboard a Chinese LM-3B launch vehicle, a rocket that had become a reliable workhorse for Chinese satellite deployment missions. The growth of such advanced satellites was made possible in part by the broader expansion of precise navigation and location services, including the end of Selective Availability in 2000, which unlocked accurate GPS signals for commercial and civil operators worldwide.

The Long March-3B's Performance on Launch Day

Delivering that kind of advanced payload to geostationary orbit demanded an equally capable launch vehicle, and on April 7, 2013, the Long March-3B met that challenge. You'd recognize this liquid-fueled rocket as China's standard workhorse for communications satellite missions, and it performed accordingly.

The vehicle executed multiple engine burn sequences, successfully inserting Zhongxing-11 into geostationary transfer orbit. Ground tracking stations confirmed healthy orbital parameters and satellite status following separation. Camera devices developed by Xi'an Institute of Optics and Precision Mechanics recorded critical events including stage separation, fairing separation, and satellite-rocket separation during the flight.

While infrasound analysis had previously flagged the Long March-3B as a statistical outlier in certain launch environment studies, no payload anomaly emerged during this mission. The payload fairing jettisoned cleanly after upper atmosphere egress, and guidance systems maintained precise trajectory accuracy throughout every mission phase, validating the vehicle's continued operational reliability. Studies monitoring rocket launches for infrasound signatures have noted that 93.4% of detections occur between October and April, when Northern Hemisphere stratospheric circulation creates favorable eastward propagation conditions.

The pursuit of reliable aviation and aerospace technology has deep historical roots, and milestones like Canada's first flight in 1909, when J.A.D. McCurdy piloted the Silver Dart over Baddeck Bay, demonstrated early on that precise engineering and careful vehicle design are foundational to every successful airborne mission.

Where Zhongxing-11 Was Deployed and What Orbit It Reached

Following separation from the Long March-3B, Zhongxing-11 settled into geostationary orbit at 98.0° East longitude, roughly 35,781 kilometers above Earth's equator. Its GEO positioning places the sub-Earth point at 0.02°N, 97.89°E, giving you a satellite that appears virtually stationary over Asia-Pacific territories.

Orbital slotting at 98°E delivers coverage across East Asia, the Indian Ocean, the Middle East, Africa, and Australia simultaneously. The satellite's perigee/apogee measurements of 35,762 and 35,825 kilometers confirm a near-circular orbit with eccentricity of just 0.0002407. Inclination stability at 0.0304 degrees prevents north-south drift, meaning ground stations require no tracking adjustments. Moving at 3.08 kilometers per second, Zhongxing-11 completes one orbit every 23 hours, 56 minutes, perfectly synchronized with Earth's rotation. Built on the DFH-4 bus by CAST, the spacecraft carries a total mass of 5,234 kilograms with a dry mass of 2,500 kilograms. The satellite was launched from Xichang Satellite Launch Center, located in Southwest China's Sichuan Province, on May 4, 2013.

Who Built and Operated Zhongxing-11 for Asia-Pacific Users

China Academy of Space Technology (CAST) built Zhongxing-11 on the DFH-4 satellite bus, producing a spacecraft with a launch mass of 5,234 kg and equipping it with 26 C-band and 19 Ku-band transponders.

You'll find that China Satcom, operating as China Satellite Communications Corp., managed the satellite's operations, positioning it at 98.0° East to serve Asia-Pacific users. The operator leveraged private partnerships to expand service reach across China and Southeast Asia, supporting television, digital transmission, and communication services.

Ground infrastructure enabled China Satcom to control and monitor the satellite throughout its 15-year design lifetime. With three receiver antennas and two transmission antennas integrated into the DFH-4 bus, Zhongxing-11 delivered reliable C-band and Ku-band coverage to meet regional user requirements. The Xichang launch complex served as the primary launch site for satellites in the Zhongxing series, utilizing Chang Zheng family launch vehicles to deliver payloads to geostationary orbit. Similarly, subscription-based service models have reshaped other industries, as seen when Netflix introduced a monthly subscription model in 1999, eliminating late fees and offering customers unlimited rentals for a single flat fee.

How China's Launch Record Made Zhongxing-11 Clients Confident

A track record spanning 95+ consecutive successful launches from Xichang gave Zhongxing-11 clients concrete reasons to trust the mission before liftoff. You'd find that China Satcom's fleet had maintained 100% uptime through a string of 2010–2013 launches, each meeting commercial deadlines without incident. Government oversight strengthened that confidence further, ensuring quality controls aligned with ITU filings and contractual obligations across Asia-Pacific markets.

Export controls shaped how international partners engaged with Chinese launch services, yet reliability metrics kept drawing clients toward capacity expansion agreements. The CZ-3B's 50+ cumulative launches, zero catastrophic failures at Xichang in five preceding years, and 95% annual launch window availability translated directly into signed contracts. You're looking at a program that earned trust through performance, not promises. This mirrors the early credibility-building approach of HP, whose Model 200B audio oscillator was modified to meet a specific client's technical requirements, earning trust through demonstrated precision rather than marketing claims. China's long-term ambitions in space were further signaled by subsequent ITU submissions proposing 203,000 satellites across 14 constellations, reflecting a national strategy extending well beyond any single launch milestone. Years later, that same infrastructure would support missions like Zhongxing-18, a civilian satellite launched in 2019 aboard a Long March 3B designed to deliver broadcast services for Chinese television, phone, radio, and internet providers.

What Zhongxing-11 Changed for Asia-Pacific Satellite Communications

Zhongxing-11's arrival at 98° East reshaped Asia-Pacific satellite communications by delivering 45 C-band and Ku-band transponders where bandwidth demand had outpaced existing capacity.

You'd notice its impact across broadcasting, DTH services, and digital multimedia networks that previously struggled with limited throughput.

By expanding transponder capacity beyond prior regional satellites, it gave broadcasters, cable operators, and data providers room to scale operations efficiently.

Its ground segment integration streamlined uplink and downlink coordination across underserved markets, reducing technical bottlenecks that had slowed adoption.

Regulatory coordination across Asia-Pacific jurisdictions became more manageable as ChinaSat established a stronger foothold in the GEO arc.

Zhongxing-11 didn't just add capacity—it repositioned China's commercial satellite presence as a reliable, high-throughput option for regional operators demanding consistent, long-term connectivity solutions. The vulnerabilities of this infrastructure became evident years later when Zhongxing 6C suffered catastrophic engine failure, causing the five-tonne communications satellite to tumble in high orbit and resulting in financial losses reaching 260 million yuan.

Zhongxing-11 also served practical commercial purposes beyond regional broadcasting, as its capacity later supported Ninmedia free Indonesian TV network services, demonstrating the satellite's lasting contribution to accessible television distribution across Southeast Asia.