Chiński komsat 19.01. o 16:25:04,723 z Xichang wystrzelona została RN CZ-3B/G3, która wyniosła na orbitę o parametrach:
hp=182 km, ha=35815 km, i=28,49° satelitę telefonii komórkowej Tiantong-1 03.
http://lk.astronautilus.pl/n210116.htm#02China sends Tiantong 1-03 satellite into orbit in first launch of 202117 795 wyświetleń•20 sty 2021
Successful communications satellite launch is first space mission of yearBy Zhao Lei | chinadaily.com.cn | Updated: 2021-01-20 09:54
A new mobile telecommunication satellite Tiantong 1-03 is launched from the Xichang Satellite Launch Center in Southwest China's Sichuan province on Jan 20, 2021. [Photo by Guo Wenbin/provided to chinadaily.com.cn]China launched a communications satellite early on Wednesday morning in its first space mission this year, the country's leading space contractor said.
A Long March 3B carrier rocket lifted off at 12:25 am from the Xichang Satellite Launch Center in West China's Sichuan province and transported the Tiantong 1-03 satellite into a preset orbit, China Aerospace Science and Technology Corp said. It was the 358th flight of the Long March rocket family.
Tiantong 1-03 is the third satellite in the Tiantong 1 system, developed by the China Academy of Space Technology, which consists of space-based assets, ground facilities and user terminals.
China's answer to the British-based Inmarsat network, Tiantong 1 is the country's first space-based mobile communications system and also part of its space-based information infrastructure, helping China break foreign companies' dominance in the field, according to its designers.
Tiantong 1-01, the first satellite in the network, was lifted into space in August 2016. Tiantong 1-02 was launched in November. Both of them are working in geosynchronous orbit.
The deployment of Tiantong 1-03 will significantly improve China's capability to maintain its communications system in emergencies and expand the coverage of the nation's independent mobile communications satellite network to the entire Asia-Pacific region, said Chen Mingzhang, chief designer of the Tiantong 1 system.
Based on the DFH-4 satellite framework, the Tiantong 1-03, like its predecessors, is tasked with providing all-weather, round-the-clock, stable and reliable mobile communication services to users, especially to those in places with restricted access to traditional communication networks such as mountains and plateaus.
It is designed to function for at least 12 years and will be able to serve about 300,000 terminal users in a wide variety of industries, including geological surveys, power generation and fisheries, Chen said.
He cited industry forecasts that there will be more than 3 million users of satellite-enabled mobile communication terminals by 2025, covering fields including marine transport, fishing, polar exploration, land surveys and emergency response.
China Aerospace Science and Technology Corp plans to launch more than 40 missions this year, including those for the nation's space station program.
Sources at China Aerospace Science and Technology Corp said those missions will be carried out by the conglomerate's Long March-series rockets, China's backbone rocket fleet, and do not include those to be made by the company's newly developed Smart Dragon solid-propellant rockets.
That means the actual number of rockets it launches this year will be even bigger.(...)
http://www.chinadaily.com.cn/a/202101/20/WS60078d62a31024ad0baa3d05.htmlChina’s first launch of 2021 orbits communications satelliteJanuary 20, 2021 Stephen Clark
A Long March 3B rocket lifts off from the Xichang launch base with the Tiantong 1-03 satellite. Credit: CASCA Chinese Long March 3B rocket deployed the Tiantong 1-03 satellite to provide mobile communications services after a successful launch Tuesday, the first of more than 40 Chinese space missions set for liftoff in 2021.
The 184-foot-tall (56-meter) Long March 3B rocket lifted off from the Xichang launch base at 11:25 a.m. EST (1625 GMT) Tuesday with the third satellite in the Tiantong 1 communications network, joining two others launched in 2016 and 2020, according to the China Aerospace Science and Technology Corp., known as CASC, the primary state-owned contractor for the Chinese space program.
After shedding its four strap-on liquid-fueled boosters, core stage, and a second stage in the first few minutes of the flight, the Long March 3B’s hydrogen-fueled upper stage delivered the Tiantong 1-03 satellite to an on-target geostationary transfer orbit ranging between 113 miles (182 kilometers) and 22,254 miles (35,815 kilometers) in altitude.
The spacecraft separated from the launcher’s upper stage, and was expected to begin a series of orbit-raising maneuvers to reach a circular orbit more than 22,000 miles over the equator. Before providing communications services, the satellite will unfurl a giant antenna that will allow it to link up with users equipped with handheld terminals.Artist’s concept of the Tiantong 1-03 satellite with its solar arrays and antenna deployed. Credit: CASTThe Tiantong network is designed for S-band mobile communications services. Chinese officials said the new satellite will be used with the Tiangong 1-01 and Tiantong 1-02 satellites already in orbit, and the network will provide coverage across the Asia-Pacific region, the Middle East, and parts of Africa.
The fleet will provide “all-weather, all-time, stable, and reliable mobile communications services such as voice, short message, and data,” according to a CASC statement.
The launch was the first of more than 40 space missions scheduled for liftoff from China this year, including the first element of a Chinese space station in the next few months, followed by the launch of a supply ship to the complex, and the flight of the first astronauts to the outpost before the end of 2021.
Two more space station modules will be added in 2022 to complete the initial assembly of the orbiting complex.https://spaceflightnow.com/2021/01/20/chinas-first-launch-of-2021-orbits-communications-satellite/https://www.nasaspaceflight.com/2021/01/china-tiantong-1-long-march-3b/Tiantong-1 01, 02, 03, 04
https://space.skyrocket.de/doc_sdat/tiantong-1.htm