Indonezyjski komsat nie dotarł na orbitę 09.04. o 11:46 z kosmodromu Xichang wystrzelona została RN CZ-3B/G2, która miała wynieść na orbitę GTO indonezyjskiego geostacjonarnego satelitę telekomunikacyjnego Palapa-N1 (Nusantara-2).
Start zakończył się niepowodzeniem na etapie pracy trzeciego stopnia. Spłonął on wraz z satelitą nad wyspami Saipan i Guam na Oceanie Spokojnym. Oznacza to niedobór prędkości 420 m/s i pracę silnika o 43 sekundy za krótką.http://lk.astronautilus.pl/n200401.htm#04Nieudany start CZ-3B z Palapa-N1 BY KRZYSZTOF KANAWKA ON 12 KWIETNIA 2020
Dziewiątego kwietnia nastąpił nieudany start chińskiej rakiety CZ-3B. W wyniku awarii rakiety nośnej utracono indonezyjskiego satelitę telekomunikacyjnego Palapa-N1.
Do startu rakiety CZ-3B doszło 9 kwietnia o godzinie 13:46 CEST. Start nastąpił z kosmodromu Xichang. Na pokładzie rakiety znalazł się indonezyjski satelita telekomunikacyjny Palapa-N1.
Nieco ponad godzinę po starcie oficjalnie poinformowano, że ten start zakończył się niepowodzeniem. W trakcie lotu rakiety zawiódł trzeci stopień rakiety CZ-3B – pracował zbyt krótko. W wyniku nieprawidłowej pracy górnego stopnia nie udało się osiągnąć wystarczającej prędkości do wejścia na orbitę. Satelita spłonął nad zachodnim Pacyfikiem.
Satelita Palapa-N1 miał masę startową 5500 kg. Satelita bazował na chińskiej platformie DFH-4. Palapa-N1 miał rozpocząć działanie na orbicie geostacjonarnej (GEO) w czerwcu 2020, poszerzając tym samym możliwości telekomunikacyjne Indonezji.
Jest to trzeci nieudany start rakiety orbitalnej w 2020 roku. Pierwszym nieudanym startem był lot/eksplozja irańskiej rakiety Simorgh na początku lutego 2020. Drugim nieudanym startem był lot chińskiej rakiety CZ-7A (16 marca 2020). Co ciekawe, w locie CZ-7A zawiódł trzeci stopień, który jest taki sam jak w CZ-3B. Oznacza to, że w tym roku ten sam stopień zawiódł już po raz drugi.
https://kosmonauta.net/2020/04/nieudany-start-cz-3b-z-palapa-n1/#prettyPhotoChina's launch mission on Palapa-N1 satellite failsSource: Xinhua| 2020-04-09 22:17:57|Editor: huaxia
XICHANG, April 9 (Xinhua) -- China's launch mission on the Long March-3B carrier rocket carrying a communication satellite of Indonesia, Palapa-N1, suffered a failure Thursday.
The rocket blasted off at 7:46 p.m. Beijing Time from the Xichang Satellite Launch Center in southwest China's Sichuan Province.
The rocket worked in normal conditions in the first-stage and second-stage. And abnormal conditions happened in the third-stage.
Debris of the third-stage rocket and satellite had fallen, and the launch mission suffered a failure, according to the monitoring data.
Investigations into the malfunction and following up works are underway.
http://www.xinhuanet.com/english/2020-04/09/c_138962095.htmLong March 3B carrying commercial Indonesian satellite failsby Caleb Henry — April 9, 2020
The launch failure was China's second of 2020. Photo shows a Long March 3B mission from 2018. Credit: CGWIC.WASHINGTON — A Chinese Long March 3B rocket failed April 9 while attempting to launch a commercial communications satellite meant to provide broadcast and broadband services to Indonesia and beyond, according to China’s Xinhua News Agency.
After lifting off from China’s inland Xichang launch center, the Long March 3B suffered a malfunction with its third stage, destroying Nusantara-2, a satellite China Great Wall Industry Corp. (CGWIC) built for an Indonesian joint venture between Pasifik Satelit Nusantara and Indosat Ooredoo.
The launch failure was China’s second of the year, following that of the Long March 7A in March.
Nusantara-2, formerly Palapa-N1, was one of the few commercial satellite exports accomplished by China, whose satellite manufacturing and launch activity has mainly served domestic customers. The satellite weighed 5,550 kilograms and carried 20 C-band transponders and a 9.5 Gbps high-throughput Ku-band payload.
Nusantara-2 was to serve as a replacement for Indosat’s Palapa-D satellite and provide expansion capacity for PSN, which operates the Nusantara-1 satellite.
Though announced as a DFH-4 satellite, Nusantara-2 was built on an upgraded version of the CGWIC platform called the DFH-4E, which could accommodate a more powerful payload, PSN CEO Adi Adiwoso told SpaceNews in an interview before the launch.
Johannes Indri, general manager of the joint venture, PSNS, said PSN planned to use the Ku-band capacity for broadband, while Indosat used the C-band for television broadcasting.
Indosat spokesperson Turina Farouk said two gateway stations were built for Nusantara-2, one each in the Indonesian cities of Medan and Surabaya. The satellite was designed mainly for Indonesia, but with coverage stretching across the Asia Pacific out to Australia.
Indosat operates the Palapa-C and Palapa-D satellites, and has no others under construction. PSN has another satellite, called SATRIA, under construction by Thales Alenia Space, and was continuing to prepare for a subsequent satellite, Adiwoso said before the launch failure.
The April 9 Long March 3B failure may have a knock-on effect on the Apstar-6D satellite, which was scheduled for launch on a Long March 3B rocket later this year. SpaceNews writer Andrew Jones contributed to this report.
https://spacenews.com/long-march-3b-carrying-commercial-indonesian-satellite-fails/Chinese rocket fails during launch of Indonesian communications satelliteApril 9, 2020 Stephen Clark
The Palapa-N1 communications satellite during pre-launch testing. Credit: PSN(...) A second burn by the cryogenic third stage would have boosted the Palapa-N1 spacecraft into a higher geostationary transfer orbit stretching to more than 22,000 miles in altitude at its highest point. Then the rocket would have deployed Palapa-N1 to continue the journey into geostationary orbit using its own engine.
But the rocket never achieved the mission’s initial parking orbit, suggesting something went wrong near the start of the first burn by the Long March 3B’s third stage engines.
The 12,235-pound (5,550-kilogram) Palapa-N1, or Nusantara Dua, satellite lost on Thursday’s launch failure was owned by Palapa Satelit Nusantara Sejahtera, a joint venture between Indosat Ooredoo and Pasifik Satelit Nusantara, or PSN.
Jakarta-based PSN said the new satellite was designed to provide C-band and Ku-band broadcast and broadband services over Indonesia and neighboring regions. Palapa-N1 was built by the China Academy of Space Technology on the DFH-4 satellite platform. (...)
https://spaceflightnow.com/2020/04/09/chinese-rocket-fails-during-launch-of-indonesian-communications-satellite/https://arstechnica.com/scie nce/2020/04/china-suffers-its-second-launch-failure-in-less-than-a-month/
https://www.nasaspaceflight.com/2020/04/long-march-3b-launches-indonesian-satellite/Palapa N1 (Nusantara 2)
https://space.skyrocket.de/doc_sdat/palapa-n1.htm
Wątek: Starty rakiet (II kwartał 2020 roku) (Przeczytany 20364 razy)