Start z problemami 21.02. o 16:47 z Bajkonuru wystrzelona została RN Sojuz-2.1b/Fregat-M, która wyniosła na orbitę satelitę
EgyptSat-A.
Podczas startu trzeci stopień rakiety rozwinął zbyt mały ciąg, w wyniku czego perigeum orbity
było o 57 km za niskie. Zostało to skompensowane pracą stopnia Fregat-M.http://lk.astronautilus.pl/n190216.htm#01EgyptSat-A na orbicie (21.02.2019) BY KRZYSZTOF KANAWKA ON 23 LUTEGO 2019
Start Sojuza-2.1b z EgiptSat-A / Credits - RoskosmosDwudziestego pierwszego lutego doszło do pierwszego rosyjskiego startu w 2019 roku. Rakieta Sojuz-2.1b wyniosła satelitę EgiptSat-A. Start nie był do końca udany.
Do startu rakiety Sojuz-2.1b z górnym stopniem Fregat-M doszło 21 lutego o godzinie 17:47 CET z kosmodromu Bajkonur. Na pokładzie tej rakiety znalazł się egipski satelita o nazwie EgiptSat-A.
Start nie był w pełni udany. Z dostępnych informacji wynika, że trzeci stopnień Sojuza pracował krócej niż planowano. Górny stopień Fregat-M wykonał dodatkową pracę, dzięki czemu EgiptSat-A znalazł się na prawidłowej orbicie.
Był to pierwszy start rosyjskiej rakiety orbitalnej w 2019 roku i jednocześnie dziesiąty start globalnie. Rosja w tym roku prawdopodobnie przeprowadzi mniej startów od Chin lub USA i jest pewne ryzyko, że niektóre z tych lotów nie zakończą się sukcesem. Coraz częściej podnoszą się głosy, że
rosyjski sektor kosmiczny jest na krawędzi załamania, które może nastąpić już niebawem.
(PFA)
https://kosmonauta.net/2019/02/egyptsat-b-na-orbicie-21-02-2019/Soyuz ready for launch with Egyptian imaging satelliteFebruary 20, 2019 Stephen Clark
The Soyuz-2.1b rocket and Fregat upper stage rolled out to the Complex 31 launch pad Monday at the Baikonur Cosmodrome in Kazakhstan. Credit: Energia(...) Russian news reports said the development of EgyptSat-A cost approximately $100 million.
The satellite weighs more than a ton fully fueled, and Tass reported EgyptSat-A features several improvements over the EgyptSat 2 design, including improved solar batteries and a high-speed radio link with ground stations.
The spacecraft’s electro-optical imaging system includes an Earth-viewing telescope and camera that can spot surface features as small as 3.3 feet (1 meter), with similar capabilities as the failed EgyptSat 2 satellite. EgyptSat-A is the third Egyptian Earth observation satellite built in Russia, following the EgyptSat 1 spacecraft launched in 2007 and EgyptSat 2 launched in 2014. (...)
https://spaceflightnow.com/2019/02/20/soyuz-ready-for-launch-with-egyptian-imaging-satellite/Egyptian observation satellite launched by Russian rocketFebruary 21, 2019 Stephen Clark
Credit: Roscosmos(...) Energia and Roscosmos, the Russian space agency, confirmed the Soyuz-1.b rocket and its Fregat upper stage delivered the EgyptSat-A spacecraft into the planned orbit. U.S. military tracking data indicated mission deployed the satellite into an orbit more than 400 miles above Earth, at an inclination of 98 degrees to the equator.
But Russian news reports suggested the mission may have experienced a close call during the climb into orbit.
Russia’s Tass news agency reported the EgyptSat-A satellite and its Fregat upper stage were tracked in a lower-than-expected orbit after the three-stage Soyuz booster deployed the rocket’s upper unit around nine minutes after liftoff.
But Tass reported that burns by the Fregat upper stage appeared to have corrected the apparent performance shortfall, which may have occurred during the third stage’s engine firing. The Fregat upper stage was expected to ignite twice to deliver EgyptSat-A to its intended orbit.
The RIA Novosti news agency also reported the launcher was observed in a lower-than-planned during Thursday’s flight, attributing the information to two space industry sources.
In the end, Russian officials said EgyptSat-A was released at the expected altitude, and the solar panels on the satellite unfurled as designed.
The Soyuz-2.1b variant of Russia’s venerable Soyuz rocket family uses a different upper stage engine than the version used for crew launches. The Soyuz-2.1b uses a four-nozzle RD-0124 engine, while the Soyuz-FG and Soyuz-2.1a configurations employ a RD-0110 third stage engine.
The next Soyuz crew launch, with two NASA astronauts and a Russian cosmonaut heading for the International Space Station, is scheduled for March 14.
The next launch of a Soyuz rocket carrying satellites was scheduled for Feb. 26 from French Guiana, a commercial mission under the management of the French launch provider Arianespace. That flight is slated to use a Soyuz ST-B rocket, a variant that uses the same third stage design as the Soyuz-2.1b launcher that flew Thursday with EgyptSat-A. (...)
https://spaceflightnow.com/2019/02/21/egyptian-observation-satellite-successfully-launched-by-russian-rocket/https://www.roscosmos.ru/26043/https://space.skyrocket.de/doc_sdat/egyptsat-a.htm