China placed communications and technology demonstration satellites into orbit in separate launches on Thursday and Friday. The successful missions marked the 46th and 47th launches by China in 2021, with 45 successes and two failures.
On Friday, a Long March 3B rocket launched the ChinaSat-1D communications satellite from the Xichang Satellite Launch Center. The geosynchronous satellite will be used for military communications.
The spacecraft and the launch vehicle were build by the state-owned China Aerospace Science and Technology Corp.
On Thursday, a Kuaizhou-1A solid-fuel booster launched the Shiyan 11 satellite from the Jiuquan Satellite Launch Center. The rocket’s builder, China Aerospace Science and Industry Corp., did not disclose the purpose of the technology demonstration spacecraft.
The Kuaizhou-1A small-satellite launcher has a record of 12 successes and one failure.
SpaceX dominated, China surged and Russia had another clean sheet as American astronauts flew from U.S. soil again in a year of firsts.
First in a series
by Douglas Messier Managing Editor
Despite the COVID-19 pandemic, 2020 was a very busy launch year with a number of firsts in both human and robotic exploration. A total of 114 orbital launches were attempted, with 104 successes and 10 failures. It was the same number of launches that were conducted in 2018, with that year seeing 111 successes, two failures and one partial failure.
A Long March 2C booster launched three Yaogan 30-07 surveillance satellites and a commercial data relay satellite on Friday. The launch was conducted from the Xichang Satellite Launch Center at 2:11 a.m. local time.
The three Yaogan 30-07 satellites will be primarily used for electromagnetic environment detection.
The fourth satellite Tianqi 12, a data relay satellite owned by Beijing-based Guodian Gaoke. The spacecraft is part of the company’s Apocalypse Internet of Things constellation.
The launch also featured some technology focused on returning the payload fairing, according to a press release about the mission from the China Aerospace Science and Technology Group.
“In this mission, the rocket fairing is equipped with an altimeter combination to measure the height change and some attitude information during the separation of the fairing and re-entry into the atmosphere, and continue to promote the parachute-based fairing debris landing zone control technology, to provide a reference for the subsequent design and improvement of the rocket landing zone control plan,” the press release said.
It was is the 369th flight of the Long March rocket series.
There were 27 orbital launch attempts with 26 successes and one failure during the first quarter of 2021. The United States accounted for nearly half the total with 13 launches behind nine flights by SpaceX.
BEIJING (CASC PR) — At 23:36 on February 4, the Long March 3B carrier rocket lifted the communication technology test satellite No. 6 into the sky frm the Xichang Satellite Launch Center. Subsequently, the satellite was successfully sent into the predetermined orbit, and the launch mission was a complete success.
The communication technology test satellite No. 6 was developed by the Eighth Academy of China Aerospace Science and Technology Corporation (CASC) Limited. It is mainly used for satellite communications, radio and television, data transmission and other services, and conducts related technical test verification.
The Long March 3B carrier rocket used for this launch belongs to the “Gold Medal Rocket” Long March 3A series and was developed by the First Academy of Aerospace Science and Technology Group.
This mission is the 360th launch of the Long March series of carrier rockets.
BEIJING (CASC PR) — At 00:25 on January 20, the Long March 3B carrier rocket ignited and lifted off at the Xichang Satellite Launch Center, and then sent the Tiantong-1 03 satellite into the scheduled orbit. The launch mission was a complete success.
A Chinese Long March 11 rocket launched the Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission on Thursday.
Long March 11 lifted off from the Xichang Satellite Launch Center at 4:14 a.m. The two GECAM satellites were placed in their intended orbits, according to a press release from Long March 11’s developer, the China Academy of Launch Vehicle Technology (CALT).
The GECAM satellites, which each weigh 163 kg, are designed to detect the electromagnetic counterparts of gravitational waves. The data will aid scientists in their studies of black holes and neutron stars.
Long March 11 is now 11-for-11 since its maiden launch in September 2015. Nine flights have originated from land, the other from an ocean platform. The four-stage, solid-fuel booster can launch payloads weighing 700 kg into low Earth orbit and 500 kg into sun synchronous orbit.
The launch was the 355th launch of the Long March series of rockets.
BEIJING (CALT PR) — On Dec. 6 at 11:58 a.m., the Long March 3B successfully launched the Gaofen 14 remote sensing satellite into orbit from the Xichang Satellite Launch Center.
There are two major changes in the Long March 3B rocket that performed the mission: the fairing has been increased by 900 mm; and it will perform the low-orbit launch mission for the first time.
The Gaofen 14 satellite launched this time has a relatively taller size. In order to meet the needs of the mission, the fairing of the rocket was 900 mm [35.4 inches] higher than the previous 4.2-meter [13.78-foot] diameter fairing.
The height of the fairing has changed the shape of the rocket. The total length of the rocket is 58 meters [190.3 ft].
The first low-orbit launch mission
In the past, Long March 3B rockets were used to perform high-orbit launch missions, including geosynchronous transfer orbit (GTO orbit) and medium earth orbit (MEO orbit). This launch is the first low-orbit launch mission of Long March 3B rocket, namely sun synchronization. Orbital mission (SSO orbit).
To this end, a lot of changes have been made to the software part of the rocket control system, and the flight software code has been rewritten by about 30%, including the addition of guidance control in the first-level flight segment, the use of “4 yuan” for attitude control throughout the entire process, and use of the third-level.
In addition to iterative guidance and control, the purpose is to adapt to changes in the launch orbit. This launch means that the Long March 3B rocket has both high and low orbit launch capabilities, which improves the orbital adaptability of the Long March 3B rocket.
This mission was the 354th launch of the Long March series rocket.
BEIJING (China Aerospace Science and Technology Group PR) — At 0:57 on October 12, at the Xichang Satellite Launch Center, the Long March 3B carrier rocket lifted the Gaofen 13 satellite into the sky. The satellite then entered the scheduled orbit, and the launch mission was a complete success.
The Gaofen 13 satellite was developed by the Fifth Academy of China Aerospace Science and Technology Corporation. It is a high-orbit optical remote sensing satellite. It is mainly used for land surveys, crop yield estimation, environmental governance, weather warning and forecasting, and comprehensive disaster prevention and mitigation. Provide information services for the construction of the national economy.
The Long March 3B carrier rocket for this launch mission was developed by the Fifth Academy of Aerospace Science and Technology Group. The rocket launch test team has done a lot of work in improving the reliability of the rocket, de-tasking products, and optimizing the pre-launch preparation process.
For this mission, the Long March 3B carrier rocket has carried out the most technological state change in recent years — 16 first-flight technologies have been updated, mainly involving satellite fairings, on-arrow pressurized transport systems, and three-stage rocket igniter, laser inertial group data, etc.
This launch is the 349th launch of the Long March series of carrier rockets.
China completed its Beidou satellite navigation system with a launch last week, fully standing up a rival to the American Global Positioning System (GPS), Europe’s Galileo constellation, and Russia’s GLONASS system and strengthening the nation as a space power.
While the United States was focused last week on its first domestic flight of astronauts to orbit in 9 years, China was busy with a pair of launches that placed four satellites into space.
A Long March 11 booster launched the Xinjishu Shiyan-G and Xinjishu Shiyan-H technology test satellites from the Xichang Satellite Launch Center on Friday, May 29.
The Xinjishu Shiyan-G satellite was developed by the Shanghai Institute of Microsatellite Innovation, which is part of the Chinese Academy of Sciences. The National University of Defence Technology developed the Xinjishu Shiyan-H satellite.
The satellites will test new Earth observation technology and inter-satellite communications.
On Sunday, a Long March 2D rocket launched the Gaofen-9 (02) remote sensing satellite from the Jiuquan Satellite Launch Center in Inner Mongolia.
The microwave spacecraft is the latest in a series of high-definition Earth observation satellites. Gaofen-9 (02) will be used for a variety of civilian purposes ranging from land use and urban planning to crop estimation and disaster prevention.
The Long March 2D booster carried the HEAD-4 technology and communications satellite as a secondary payload. The spacecraft is owned by HEAD Aerospace Tech Co. Ltd. of Beijing.
A Chinese Long March 3B booster failed after launch on Thursday, destroying an Indonesian communications satellite and providing a spectacular nighttime light show for residents of Guam as debris burned up in the atmosphere.
China’s Xinhua news agency said the Long March 3B’s third stage malfunctioned after launch from the Xichang Satellite Launch Center.
The booster was carrying the Palapa-N1 geosynchronous communications satellite. The spacecraft was owned by Palapa Satelit Nusantara Sejahtera, which is a joint venture of Pasifik Satelit Nusantara and Indosat Ooredoo.
Palapa-N1, also known as Nusantara Dua, would have provided C-band and Ku-band broadcast and broadband services for Indonesia and neighboring regions. The China Academy of Space Technology built the spacecraft based on its DFH-4 platform.
Debris from the launch reentered the atmosphere near Guam. Officials said the debris posed no threat to the U.S. territory.
It was China’s second launch failure in less than a month. On March 16, the maiden launch of the Long March 7A rocket went awry, destroying a classified government satellite. Chinese officials have not announced the cause of the failure.