Autor Wątek: Falcon 9 | AMOS-17 | 7.08.2019  (Przeczytany 2808 razy)

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Odp: Falcon 9 | AMOS-17 | 7.08.2019
« Odpowiedź #30 dnia: Sierpień 07, 2019, 09:30 »

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Odp: Falcon 9 | AMOS-17 | 7.08.2019
« Odpowiedź #31 dnia: Sierpień 07, 2019, 16:59 »
Falcon tym razem nie powrócił
  06.08. o 23:23:00,538 z Cape Canaveral wystrzelona została RN Falcon-9, która wyniosła w T+27' 24" na orbitę GTO
satelitę telekomunikacyjnego Amos-17. Tym razem nie odzyskano pierwszego stopnia, udało się za to przechwycić w locie
jedną z połówek osłony aerodynamicznej.

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Falcon-9 wynosi AMOS-17

Start Falcona 9 z AMOS-17 / Credits - SpaceX

Siódmego sierpnia rakieta Falcon 9 wyniosła izraelskiego satelitę telekomunikacyjnego AMOS-17. Po tym locie doszło do udanego odzyskania osłony aerodynamicznej rakiety.

Rakieta Falcon 9 wystartowała 7 sierpnia o godzinie 01:23 CEST z wyrzutni LC-40 na Florydzie. Był to jeden z dość rzadkich startów Falcona 9, w którym SpaceX nie przeprowadził próby odzyskania pierwszego stopnia. Lot rakiety zakończył się z sukcesem i izraelski satelita telekomunikacyjny AMOS-17 znalazł się na prawidłowej orbicie transferowej GTO.

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Start Falcona 9 z AMOS-17 / Credits – SpaceX

W tym locie SpaceX odzyskał osłonę aerodynamiczną rakiety za pomocą statku Ms. Tree. Poniższe nagranie prezentuje moment odzyskania owiewki. Firma SpaceX zamierza regularnie odzyskiwać osłony z uwagi na ich wysoki koszt produkcji. Prawdopodobny koszt owiewek to wartość rzędu 1-3 M USD za lot.

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Odzyskanie osłony aerodynamicznej Falcona 9 / Credits – SpaceX

Satelita AMOS-17 ma masę startową 6500 kg. Tego satelitę zbudowała amerykańska firma Boeing dla izraelskiej Spacecom. Satelita AMOS-17 ma zastąpić innego satelitę tej firmy i oferować usługi telekomunikacyjne dla Europy, północnej Afryki i Bliskiego Wschodu. Spodziewany czas działania tego satelity na orbicie geostacjonarnej (GEO) to minimum 15 lat.

Warto tu dodać, że zaledwie cztery godziny wcześniej wystartowała rakieta Ariane 5 z kosmodromu Kourou w Gujanie Francuskiej. Na pokładzie tej rakiety znalazły się dwa inne satelity telekomunikacyjne, które mają operować z GEO.


Photos: Amos 17 satellite encapsulated for launch
August 6, 2019 Stephen Clark

The Amos 17 satellite during encapsulation inside the Falcon 9 payload fairing. Credit: Spacecom Ltd. / SpaceX

Air Force’s Cape Canaveral commander excited for two launches in less than 36 hours
August 5, 2019 Stephen Clark

File photo of a Falcon 9 rocket taking off from pad 40 at Cape Canaveral Air Force Station. Credit: SpaceX

(...) Brig. Gen. Doug Schiess, commander of the 45th Space Wing, told reporters Monday morning that the Air Force would likely clear the SpaceX launch to proceed Tuesday. The Falcon 9 was supposed to take off Saturday, but SpaceX delayed the launch to replace a valve and conduct a second test-firing of the rocket at pad 40.

“We believe we’re in a position, very shortly, to say that we can launch tomorrow night with SpaceX and (the Atlas 5 rocket with) Advanced EHF on Thursday morning,” Schiess said.

The Air Force confirmed the range approval Monday afternoon, setting up the Space Coast for the fastest turnaround between two orbital rocket launches since May 1981, according to a launch log tabulated by Jonathan McDowell, an astronomer at the Harvard-Smithsonian Center for Astrophysics who tracks global space activity.

A Delta rocket launched with a GOES weather satellite on May 22, 1981, followed by liftoff of an Atlas-Centaur launcher and an Intelsat communications satellites a little more than 24 hours later.

The Falcon 9 and Atlas 5 rockets are scheduled to roll out to pad 40 and 41 early Tuesday. The two launch pads, located around a mile-and-a-half from each other along the Cape Canaveral coastline, were originally built for the Air Force’s Titan rocket program. (...)

SpaceX successfully launches Israeli-owned telecom satellite
August 7, 2019 Stephen Clark

A Falcon 9 rocket lifted off with the Amos 17 communications satellite at 7:23 p.m. EDT (2323 GMT) Tuesday from pad 40 at Cape Canaveral Air Force Station. Credit: SpaceX

(...) Elon Musk, SpaceX’s founder and CEO, reported on Twitter that the company’s offshore vessel “Ms. Tree” successfully caught one half of the Falcon 9 rocket’s payload fairing in the Atlantic Ocean after Tuesday night’s launch.

The shroud protected the Amos 17 spacecraft during the first few minutes of flight through the dense, lower layers of the atmosphere. Once in space, rocket jettisoned the clamshell-like shroud in two pieces because it was no longer needed.

In a launch industry first, SpaceX has fitted the fairing halves with control thrusters and parafoils to slow their descent from space back through the atmosphere. Ms. Tree has a giant net to capture the fairing as it gently comes back to Earth. (...)

Elon Musk, SpaceX’s founder and CEO, told reporters last year that the fairing costs around $6 million.

The other half of the shroud from Tuesday night’s mission with Amos 17 splashed down in the ocean under a separate parachute. Teams on a SpaceX vessel planned to pull the structure from the sea and return it to port with the fairing half caught by Ms. Tree. (...)

Spacecom says the $250 million Amos 17 satellite is designed for a 20-year lifetime.

Amos 17 will replace the Amos 5 satellite at 17 degrees east, which failed in 2015. The new satellite carries C-band, Ku-band and Ka-band communications payloads to provide television broadcast, broadband Internet and other networking and data relay services.

David Pollack, Spacecom’s president and CEO, said Amos 17 has a “smart payload” that can be reprogrammed from the ground to meet changing market demands.

“This satellite is based on our 702 heritage bus,” said Chris Johnson, president of Boeing Satellite Systems, which built Amos 17 in El Segundo, California. “It has a highly flexible payload and digital channelizer that is at the cutting edge, and will give Spacecom the ability to adjust and provide flexibility for changing user coverage for different mission needs, and to be able to do a lot of reconfiguration on orbit to meet the growing demand.”

Similar reprogrammable digital payloads have flown on previous Boeing satellites, including on the U.S. Air Force’s newest Wideband Global SATCOM communications spacecraft, and on Intelsat’s “Epic” video, data and Internet relay satellites.

But Amos 17 is the first satellite to carry a channelizer to route data using three different communications bands. The digital payload can automatically switch between bands for data uplinks and downlinks, without requiring any special equipment from users.

Tuesday’s launch marked the return of Spacecom to Cape Canaveral for the first time since the company’s Amos 6 communications satellite was destroyed during a catastrophic explosion minutes before a planned test-firing of a Falcon 9 rocket on the launch pad in September 2016. (...)

At nearly 7.2 tons fully fueled, Amos 17 is a hefty spacecraft. The satellite needed all of the Falcon 9’s performance to reach its targeted geostationary transfer orbit.

But Falcon 9 rockets have deployed heavier geostationary communications satellites in lower orbits before. In those cases, the satellites had to consume more of their own propellant to reach their operating posts.

With the higher orbit achieved Tuesday, Amos 17 is closer to its final orbital position, and the satellite will have enough fuel to function for 20 years, according to Spacecom.

The tradeoff is that SpaceX could not recover the Falcon 9’s first stage, a veteran of two previous launches and landings in 2018. (...)

SpaceX launches Amos-17 satellite for Spacecom
by Caleb Henry — August 6, 2019

SpaceX did not retrieve the Falcon 9 booster after launching Amos-17. Credit: SpaceX webcast.

WASHINGTON — SpaceX launched a communications satellite for Israeli satellite operator Spacecom Aug. 6 on an expendable Falcon 9 mission.

The rocket lifted off from Cape Canaveral Air Force Station in Florida at 7:23 p.m. Eastern, following a three-day delay to replace a suspect rocket valve.

Amos-17, Spacecom’s newest satellite, separated from the rocket’s upper stage 32 minutes after liftoff. The launch is SpaceX’s tenth for the year.

Spacecom famously lost a satellite, Amos-6, during a Falcon 9 explosion days before a planned launch in 2016. The satellite operator said in 2017 that its launch of Amos-17 would be fully covered by credits from the unfulfilled mission.

Built by Boeing, Amos-17 is designed to provide broadcast and broadband connectivity services across sub-Saharan Africa, Europe, the Middle East and parts of Asia. The satellite carries a mix of C-, Ku- and Ka-band transponders, plus a digital channelizer for improved capacity allocation and signal interference mitigation.

SpaceX used the same first-stage booster to launch two previous satellites: Telstar-19 Vantage for Canadian operator Telesat in July 2018, and Es’hail-2 for Qatari operator Es’hailSat in November 2018. The company did not land the Falcon 9 booster for this mission, devoting the fuel that would have been used for a recovery instead to placing the 6,500-kilogram satellite into orbit.

SpaceX CEO Elon Musk tweeted after the launch that a drone ship successfully captured a payload fairing from the mission.

Amos-17 is designed to operate for 20 years — five more than the average geostationary communications satellite. With solar panels deployed, the satellite has a wingspan of 35 meters.

Spacecom tasked Boeing with building Amos-17 in December 2016 under a $161 million contract. The satellite replaces Amos-5, a Russian and French-built spacecraft that ceased communicating in November 2015 just four years after launch due to a power failure.

Spacecom has been borrowing an AsiaSat satellite since 2017 to fill the gap left by Amos-5 while waiting for the launch of Amos-17. The company ordered another satellite, Amos-8, from Maxar Technologies in 2018, but canceled the purchase and a SpaceX Falcon 9 launch contract after the Israeli government said the satellite would be built domestically instead.

Watch SpaceX Launch Their 10th Flight of 2019 Tonight with AMOS-17
By Ben Evans, on August 6th, 2019

AMOS-17 being enshrouded within the Falcon 9 rocket’s bullet-like payload fairing for the launch to space. Photo Credit: Spacecom

SpaceX Launches 10th Mission of 2019 with AMOS-17
By Ben Evans, on August 6th, 2019

Long-exposure streak from across the Indian River in Titusville, AMOS-17 launch. Photo: Alan Walters /

« Ostatnia zmiana: Sierpień 08, 2019, 22:59 wysłana przez Orionid »

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Odp: Falcon 9 | AMOS-17 | 7.08.2019
« Odpowiedź #32 dnia: Sierpień 08, 2019, 22:35 »