Satelita przekazu danych z CSS 06.07 o 15:53 z Xichang wystrzelona została RN CZ-3C/G2, która wyniosła na orbitę satelitę transmisji danych Tianlian-1 (05).
http://lk.astronautilus.pl/n210701.htm#05Long March-3C launches TianLian-1 059341 wyświetleń
China conducts third orbital launch inside four daysby Andrew Jones — July 6, 2021
A Long March 2D lifts off from Taiyuan early July 3 UTC carrying five commercial satellites. Credit: CASC(...) Tianlian satellites facilitate communications between satellites in low and medium Earth orbits and ground stations. The satellites allowed a recent conversation between Chinese president Xi Jinping and the Shenzhou-12 astronauts aboard the Tianhe module, as well as real-time communications for a July 3 spacewalk.
Tianlian-1 (05) joins four earlier Tianlian-1 satellites, with the previous launch being in 2016, as well as the upgraded Tianlian-2 (01), sent into orbit in 2019. Tianlian satellites perform a similar role as the U.S. Tracking and Data Relay Satellite System (TDRSS). (...)
https://spacenews.com/china-conducts-third-orbital-launch-inside-four-days/China launches last Tianlian I-series satelliteBy ZHAO LEI | chinadaily.com.cn | Updated: 2021-07-07 01:00
A Long March 3C carrier rocket blasts off from the Xichang Satellite Launch Center in Southwest China's Sichuan province, July 6, 2021. China successfully launched a new relay satellite from the Xichang Satellite Launch Center at 11:53 pm Tuesday (Beijing Time). Tianlian I-05 was sent into orbit by a Long March 3C carrier rocket. Tuesday's launch was the 378th mission of the Long March rocket series. [Photo/Xinhua]China launched the last satellite in its Tianlian I relay spacecraft series late Tuesday night, which also marked the finale of the country’s DFH-3 satellite platform.
A Long March 3C carrier rocket blasted off at 11:53 pm at the Xichang Satellite Launch Center in Sichuan province and then placed the Tianlian I-05 satellite into a geostationary orbit, according to China Aerospace Science and Technology Corp, the country’s leading space contractor.
The State-owned conglomerate said in a statement that the satellite is the fifth and last member of the Tianlian I fleet, the nation’s first-generation data relay spacecraft.
It is expected to work for at least seven years. Its service will further improve the country’s capability of relaying signals between satellites and ground control, the statement noted.
China began to establish its own space-based data relay system in April 2008 when the first satellite in the Tianlian I series was launched from Xichang. The Tianlian I-01 is still operating in orbit, extensively outliving its designed life span.
In July 2012, China became the second country, after the United States, possessing non-stop relay capability for its space-based infrastructure after the Tianlian I-03 was deployed into space to join its two predecessors to form a basic system with global coverage.
In March 2019, China launched Tianlian II-01, the first of its second-generation data relay satellite.
Currently, the Tianlian network consists of six spacecraft – five of the Tianlian I and one in the Tianlian II series. Sources close to the system’s development said the Tianlian II-02 and Tianlian II-03 will be deployed soon.
Compared with the first-generation model, Tianlian II satellites feature stronger capabilities, heavier carrying capacity and longer life spans, according to Zhao Hong, chief designer of the Tianlian II-01.
“Because of its newly developed antennas, the data transmission speed of the new-generation type is twice that of the first generation,” Zhao said.
Tianlian II satellites can serve more spacecraft and have a larger operational range, he added.
Tianlian has served several important space functions such as rendezvous and dockings between spaceships and space stations and video link between astronauts and people on the ground.
http://www.chinadaily.com.cn/a/202107/07/WS60e48c35a310efa1bd6601aa.htmlChina launches satellite to link mission control with space stationJuly 11, 2021 Stephen Clark
A Long March 3C rocket lifts off July 6 with China’s new Tianlian 1-05 data relay satellite. Credit: CASCChina launched a fresh satellite for the country’s Tianlian data relay network July 6, reinforcing a fleet of spacecraft designed to connect ground controllers with the country’s space station.
The Tianlian 1-05 data relay satellite launched at 11:53 a.m. EDT (1553 GMT) July 6 on a Long March 3C rocket from the Xichang space center in Sichuan province of southwestern China, according to the China Aerospace Science and Technology Corp., or CASC.
CASC is China’s top state-owned aerospace contractor that oversees large swaths of the country’s space program.
The Long March 3C rocket took off at 11:53 p.m. Beijing time and headed east from the Xichang launch base. The 18-story rocket jettisoned its two hydrazine-fueled strap-on boosters about two minutes into the flight, followed moments later by separation of the rocket’s core stage.
The boosters and first stage fell back to Earth in Chinese territory as the Long March 3C continued into orbit powered by a hydrazine-fueled second stage and a hydrogen-fueled third stage.
The Long March 3C’s reignitable third stage deployed the Tianlian 1-05 data relay satellite into an elongated orbit reaching a high point, or apogee, of nearly 25,000 miles (40,000 kilometers), according to tracking data published by the U.S. military. The rocket placed the payload in an orbit inclined 17.5 degrees to the equator.
In the next few weeks, the Tianlian 1-05 spacecraft will use its on-board propulsion system to reach a circular geosynchronous orbit more than 22,000 miles (nearly 36,000 miles) over the equator.Artist’s concept of the Tianlian 1-05 data relay satellite. Credit: CASCThe new Tianlian data relay satellite was built by the China Academy of Space Technology using the DFH-3 spacecraft bus.
China launched the first Tianlian communications satellite in 2008. The launches of the Tianlian 1-02 and Tianlian 1-03 satellites in 2011 and 2012 gave the data relay network near-global coverage, ensuring consistent communications links with Chinese astronauts on human spaceflight missions.
The fourth Tianlian 1 satellite launched in 2016, followed by the first spacecraft of the new-generation Tianlian 2 series in 2019.
Chinese officials said the Tianlian 1-05 satellite that launched July 6 is the final spacecraft in the first generation of Tianlian data relay stations.
The Tianlian satellites are similar in function to NASA’s Tracking and Data Relay Satellites, connecting mission control with orbiting astronauts without requiring a global network of ground antennas.
According to CASC, the Chinese aerospace contractor, the Tianlian network relays communications signals between the ground and China’s Tiangong space station, low Earth orbit satellites, and launch vehicles.
China launched the first element of the Tiangong space station in April, and the first three-man crew docked with the space lab in June to begin a three-month mission in orbit. Future crews will spend six months on the Tiangong complex.
Astronauts living on the Tiangong space station use the Tianlian network for audio and video communications, while mission control relies on the Tianlian fleet to receive telemetry data on the health of space station systems, Chinese officials said.https://spaceflightnow.com/2021/07/11/china-launches-satellite-to-link-mission-control-with-space-station/https://www.nasaspaceflight.com/2021/07/fifth-tianlian-1-satellite/https://space.skyrocket.de/doc_sdat/tl-1.htm