Czwarty z rzędu chiński start 22.09. o 21:10:04,639 z Xichang wystrzelona została RN CZ-3B/YZ-1, która wyniosła na orbitę o parametrach:
hp=205 km, ha=18568 km, i=55º dwa satelity nawigacyjne Beidou-3 M23 i M24.
http://lk.astronautilus.pl/n190916.htm#03Pięć startów w pięć dni BY KRZYSZTOF KANAWKA ON 29 WRZEŚNIA 2019
Pomiędzy 22 a 26 września doszło do pięciu startów rakiet orbitalnych: dwóch chińskich, dwóch rosyjskich i jednej japońskiej.
Rakiety, które wystartowały pomiędzy 22 a 26 września pochodziły z trzech państw. W tym czasie nie nastąpił żaden start rakiety amerykańskiej, indyjskiej czy europejskiej.
Dwa nowe satelity BeiDouCZ-3B z dwoma satelitami nawigacyjnymi chińskiej konstelacji BeiDou. Ten start nastąpił 22 września o godzinie 23:10 CEST z kosmodromu Xichang. Lot przebiegł prawidłowo i dwa satelity BeiDou znalazły się na prawidłowych średnich orbitach okołoziemskich (MEO).
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https://kosmonauta.net/2019/09/piec-startow-w-piec-dni/China launches two new BeiDou satellitesSource: Xinhua| 2019-09-23 15:33:12|Editor: Xiang Bo
China sends two satellites of BeiDou Navigation Satellite System (BDS) into space from the Xichang Satellite Launch Center in Xichang, southwest China's Sichuan Province, Sept. 23, 2019. Launched on a Long March-3B carrier rocket, the two satellites entered the orbit. They are the 47th and 48th satellites of the BDS satellite family. After in-orbit tests, the new satellites will work with those BDS satellites already in orbit to improve positioning accuracy of the system. (Photo by Zhang Wenjun/Xinhua)XICHANG, Sept. 23 (Xinhua) -- China successfully sent two satellites of the BeiDou Navigation Satellite System (BDS) into space from the Xichang Satellite Launch Center in Sichuan Province at 5:10 a.m. Monday.
Launched on a Long March-3B carrier rocket, the two satellites entered orbit. They are the 47th and 48th satellites of the BDS satellite family.
The new satellites and the carrier rocket were developed by the China Academy of Space Technology (CAST) and the China Academy of Launch Vehicle Technology, under the China Aerospace Science and Technology Corporation.
After in-orbit tests, the new satellites will work with BDS satellites already in orbit to improve the positioning accuracy of the system.
According to the CAST, the two satellites are medium earth orbit (MEO) satellites.
Compared with previously launched MEO satellites, these two are equipped with lightweight hydrogen maser clocks, which will serve as a more stable precision frequency reference to make the satellite navigation system work more accurately.
The two satellites are also equipped with new processors to improve navigation signals.
Meanwhile, new payloads for international search and rescue tasks and message communication will enable users to send short messages and know their own exact location when no communication networks are available.
The CAST said that it is the first launch of MEO satellites this year since the basic BDS constellation deployment was completed last November.
The launch on Monday also opened a new round of busy launch schedules for BDS, during which, from the second half of 2019 to 2020, a complete constellation system will be deployed, said the CAST.
To meet the tight launch schedule, the CAST said it streamlined the development process of BDS satellites. It managed to develop 12 satellites at the same time, reducing the development cycle of a single satellite model to 18 months from 36 months.
Monday's launch was the 312th mission for the Long March series carrier rockets.
China began to construct its navigation system, named after the Chinese term for the Big Dipper constellation, in the 1990s and started serving the Asia-Pacific Region in 2012.
China plans to send 10 BDS satellites into space this year. The launches will help complete the BDS global network by 2020.
The system has been applied in many industries including transport, maritime affairs, electricity, civil affairs, meteorology, fishery, surveying and mapping, mining and public security.
The BDS has also been widely used around the world in projects such as building construction in Kuwait, precision agriculture in Myanmar, land surveying and mapping in Uganda and warehousing and logistics in Thailand.
To enable the BDS to better serve the economic and social development in Belt and Road countries and regions, China has established BDS cooperation mechanisms with countries and organizations in South Asia, Central Asia, ASEAN, the Arab League and Africa, strengthening technical exchanges and personnel training, and building BDS overseas centers.
http://www.xinhuanet.com/english/2019-09/23/c_138414889.htmTwo more satellites launched into China’s Beidou navigation fleetSeptember 23, 2019 Stephen Clark
A Long March 3B rocket lifted off at 2110 GMT Sunday (5:10 p.m. EDT), or 5:10 a.m. Beijing time Monday, with two more Beidou navigation satellites. Credit: Xinhua(...) Around four hours after liftoff, the Yuanzheng upper stage delivered the Beidou satellites into a nearly circular orbit with an average altitude of approximately 13,500 miles (21,800 kilometers), with an inclination of 55 degrees, according to tracking data published by the U.S. military.
Chinese officials declared the launch a success. It was China’s 19th orbital launch attempt in 2019, including two missions that failed to reach orbit.
The two Beidou navigation satellites launched Sunday were produced by the China Academy of Space Technology, a government-owned satellite builder, according to China’s official Xinhua news agency.
The satellites were the 47th and 48th spacecraft launched in the Beidou navigation program since 2000. That number includes test satellites and older-generation navigation craft, some of which are no longer in service.
The Beidou network includes satellites positioned in three different types of orbits. Most of the Beidou satellites are in Earth orbit more than 13,000 miles above the planet — the orbit targeted on Sunday’s mission — similar to the orbits used by GPS, Glonass and Galileo navigation satellites.
But unlike the other global navigation systems, the fully-operational Beidou network will include eight spacecraft in geosynchronous orbit, with five over the equator and three others in inclined orbits.
With Sunday’s launch, China has added five new satellites to the Beidou network this year. Chinese state media said earlier this year that 10 Beidou satellites were due for launch in 2019.
China aims to complete the Beidou network with global coverage next year.
Two more Long March 3B launches for the Beidou network are planned before the end of the year, each carrying two satellites into medium Earth orbit, CALT said in a statement.
https://spaceflightnow.com/2019/09/23/two-more-satellites-launched-into-chinas-beidou-navigation-fleet/China continues intense activity with environment, navigation satellite launchesby Andrew Jones — September 25, 2019
Liftoff despite prior earthquakeA Long March 3B lifted off from the Xichang Satellite Launch Center, southwestern China, Sept. 22, despite a nearby 3.5 magnitude earthquake just over a day prior.
The launch used a Yuanzheng-1 upper stage to insert two Beidou navigation and positioning satellites into medium Earth orbits (MEO).
A piece of a rocket engine, apparently resulting from the launch, was found downrange and posted on Chinese social media.
This was the tenth launch of pairs of Beidou satellites to MEO, as China pushes to complete its own answer to the U.S. GPS.
Further Beidou launches, to MEO and inclined geosynchronous orbits, are expected before the end of 2019. China aims to complete the 35-satellite Beidou constellation—which is named after the Big Dipper asterism—in the first half of 2020.
The Wenchang Satellite Launch Center, located on Hainan island, also participated in the launch activities, according to reports.
Wenchang hosts launches of China’s new, large cryogenic launch vehicles. The exercises may indicate ongoing ground preparations for the return-to-flight of the Long March 5, which could launch before the end of 2019.
The Long March 5 is required for major projects, including the Chinese Space Station and upcoming lunar and Mars missions. It has been grounded since a launch failure in July 2017.
https://spacenews.com/china-continues-intense-activity-with-environment-navigation-satellite-launches/https://www.nasaspaceflight.com/2019/09/long-march-3b-beidou-3m-satellites/BD-3 M23 (Beidou 47)
https://space.skyrocket.de/doc_sdat/bd-3m.htmBD-3 M24 (Beidou 48)
Wątek: Starty rakiet (III kwartał 2019 roku) (Przeczytany 39340 razy)