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Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Delta 4 launches 10th Air Force's 10th Broadband Satellite – Spaceflight Now

Delta 4 launches 10th Air Force's 10th Broadband Satellite – Spaceflight Now



United Alliance Delta 4 rocket launches from the Air Force of Cape Canaveral, Florida, on Friday with the US Air Force's tenth broadband communications satellite at Global SATCOM. The United Launch Alliance has launched a new orbiting fuselage on Friday night from Cape Canaveral using a version of the Delta 4 rocket that is approaching retirement to supplement the US Military Network . from commanders of unmanned aircraft and battlefields.

After the ground crews removed several technical obstacles with the missile and the satellite tracking network, the main hydrogen-powered RS-68A engine with a height of 218 meters and 66 meters with an orange flare before take-off. Five seconds later, four solid rocket engines and released bolts were launched at 20:26 EDT Friday (0026 GMT Saturday), when Delta 4 quickly climbed from the Cape Canaveral 37B launch site with £ 1.8m.

The main engine and thrust nozzles redirected their thrust to shift Delta 4 eastward across the Atlantic by sending US Air Force's 10th broadband communications satellite to its ultimate US Air Force position for more than 22,000 miles (nearly 36,000 kilometers ) over the equator in the geostationary orbit.

Delta 4 solid missiles, built by Northrop Grumman, were burned and thrown in two pairs for about 1 minute, 40 seconds in the mission. Once over the dense low layers of atmosphere, Delta 4 released its cone to reveal the WGS 10.

The main engine of the Aerojet RS-68A worked almost four minutes while the first stage was released into the Atlantic Ocean. The RL10B-2 engine of a higher stage, supplied by Aerojet Rocketdyne, ignites twice to overcome the spacecraft WGS 10 in an elliptical orbit to transfer, which varies to 27,500 miles (44,300 kilometers) above Earth.

Boeing's WGS 10 separates from the top of Delta 4 on T + plus 36 minutes, 50 seconds, expanding the company's successful missions from 133 to its creation in 2006

The WGS 10. Credit Boeing

The Friday night launch was delayed 90 minutes to allow engineers time to explore the technical problems of the first and second stages of the Delta 4 rocket. Once these questions were cleared, the startup team had to wait for the officials to make sure that NASA's satellite tracking and data transmission system is d this direct telemetry from missile to ground controllers.

The mission marked the last flight of the Delta 4 Rocket Variant with one core of the first stage – known as Delta 4-Medium – as the ULA began withdrawing segments of its family starter in preparation for the debut of the new volcano booster, which the company says that it will be cheaper than Delta's existing Delta Athletes and Fleet

Gary Wenz, government vice president and ULA commercial programs, said the company's decision in 2014 to retire Delta 4-Medium is intended to reduce the cost of the company. products we provided, and we found that keeping these two families of carrier missiles both Delta and Atlas during this period reduced our flight levels and therefore increased our costs, "he said. "It really did it, based on the competitive industry we are in, trying to increase our competitiveness."

The Delta 4-Medium family provides the same range of lifting options as the cheaper Atlas 5. t Delta 4-Heavy, which will remain in operation at least early in the mid-2020s uses three nuclear delta 4s connected to each other to pull heavier loads in orbit from each of the Atlas 5 configurations

formed in 2006 by the merger of Delta 4 Boeing and Atlas 5 Delta Lockheed Martin. The 50-50 Joint Undertaking supported the two missile lines in action to ensure that US military had two independent capabilities to launch national security satellites.

However, SpaceX's Falcon 9 and Falcon Heavy are already certified to launch US national cargo. With the Falcon and Atlas rockets, the military will continue to have two marketing options after the Delta 4-Medium retreat. Credit: Alex Polymers / Spaceflight Now

The Delta 4-Medium + 5,4 version with four solid rocket boosters and a 5.1-foot (16.7-foot) top floor and a payload cover is used on Friday's start. This is the eighth and final flight of the Delta 4-Medium + 5.4 configuration and all WGS Air Force ships.

Another Delta 4-Medium missile is set to launch on July 25 from Cape Canaveral with Air Force GPS Navigation Companion. This starter will fly the configuration of Delta 4-Medium + 4.2, with two solid rocket boosters and a 4-meter (13.1-foot) diameter at the top stage and the cargo load curtain. 39 times since November 2002, and 28 of these missions used Delta 4-Medium. "It had a very successful story, and it is similar to the WGS satellite, it's a working horse for the Air Force," Wenz said. Delta 4-Medium. "It's kind of bitter that we're here at the end, but we look forward to the missions that will come in the future and the vehicles we'll do."

Including GPS launch in July, ULA has contracts There are six Delta 4 flights in 2024. The five Delta 4-Heavy launches planned at the early 2020s will erect the most secret payloads for the National Intelligence Service, the US government spy agency:

  • Delta 4-Medium + 4, 2 with GPS 3 SV02 payload
    • Launch date: July 25, 2019
    • Launch site: SLC-37B, Air Force of Cape Canaveral, Florida
    • Delta 4-Heavy with payload NROL-44

      • Launch Date: 2020
      • Starting Point: SLC-37B, Air Force Base Cape Canaveral, Florida
      • ]

      Starting Date: 2020

    • Starting Point: SLC-6, Air Force Base Vandenberg, California

    Delta 4-Heavy with payload NROL-91

    • Launch date: Fiscal year 2022
    • Launch site: SLC-6, Air Force Base Vandenberg, California
    • Delta 4-Heavy with Payload NROL-68

      • Launch Date: Fiscal Year 2023
      • Launch Site: SLC-37B Air Force Cape Canaveral, Florida
      • ] Delta 4-Heavy with Payload NROL-70

        • Launch Date: Fiscal Year 2024
        • Launch Site: SLC-37B, Air Force on Cape Canaveral, Florida

      The WGS 10 Communications Satellite, which launches on Friday night, joins nine broadband satellites deployed since 2007 to form a global video network, data and other information between the battlefield and decision-makers.

      The WGS fleet reports classified and unclassified signals, supporting US and Allied forces around the world. Featuring a digital channel converter, the $ 400 million 10 satellite will deliver high-speed communications in the X-band and Ka-band frequencies during a mission that is expected to last for at least 14 years.

      on the WGS 10 Ka-band satellite reflectors during a deployment test at the Boeing factory in El Segundo, California. Credit: Boeing

      "WGS has the unique ability to cross the military Ka and X band, which gives our soldiers considerable flexibility to increase communication capabilities," said Tom Becht, Director of Military Satellite Communications "The Air Force Space and Missile Systems Center in Los Angeles

      The nine previous WGS satellites were launched on ULA missiles – the first two of the Atlas 5s in 2007 and 2009, and the next seven on the Delta 4s. The Broadband Global SATCOM Fleet is the United States Department of Defense's largest satellite communications network

      Two of the 10 WGS satellites launched so far are funded by international governments. WGS 6 is funded by Australia, and a consortium including Canada, Denmark, Luxembourg, the Netherlands and New Zealand paid for the WGS 9 launched in March 2017. In return for their contributions, the military from these countries gained access to the WGS .

      WGS 10 is the fourth and final WGS satellite of Block II Follow-On, the third with a digital channel that manages communication signals more efficiently, almost doubling the bandwidth provided by the earlier spacecraft in the series.

      Based on the Boeing 702 satellite platform, the WGS 10 will use an engine to accelerate the engine and plasma engines that will circulate in its orbit over 22,000 miles above the equator. The maneuvers will take about four months, officials said, before WGS 10 reaches geostationary orbit where its speed will correspond to the Earth's speed of rotation.

      Army Colonel Enrique Costas, head of the Defense Communications and Army Transmission Systems project, said the WGS network was widely used

      After a two-month test in a geostationary orbit over the US, military leaders would decide where to deploy WGS 10. [inthearmyforitshighbandwidthreliabilityandcapabilityallowinglivevideotransmissionfromunmannedaircraftworldwideoverhundredsorthousandsofmiles"IfIwastargetingaspecificterroristintheMiddleEastandIhaveanIntelligenceSurveillanceandIntelligenceplatformlookingatthisterroristIneedtobeabletodecidewhethertoshootorsendagroundsquadtodothat-saidCostas

      "I must be able to pass this signal from the collection site all the way back to the center where it will be decided whether to pull the trigger or send a team to "

      The White House and the State Department also rely on WGS satellites and the network is broadcasting television signals to troops located on the m

      … I have a teleconference between (the commander of the fighters) and the president of the United States, I want to make sure that the signal does not go down at any time during this conversation to make critical decisions, "he continued. "The WGS is part of this transport to make sure we have reliable and secure communications no matter where we are on the planet."

      The Air Force is close to awarding a new contract to Boeing for at least another WGS Satellite.

      Congress added $ 600 million to the 2018 budget for two new WGS satellites, rejecting military plans to start getting more communications from commercial satellites. The financial line, however, did not include funds for launching satellites, each costing between 300 and 400 million dollars.

      The Air Force launched a new round of WGS orders using unexpected money, and Boeing presented a proposal in January. Military representatives have not decided whether to order one or two WGS satellites, according to Becht. He said the final decision and the signing of the treaty are expected later this year.

      Becht said Air Force could follow a purchasing model that is often used by commercial satellite operators in which Boeing will be responsible for building the new WGS spacecraft using higher costs. effective practices. Boeing could also choose a launch flight provider for the new spacecraft WGS to bring the entire mission into a turnkey contract with the final delivery of the satellite to the air force after being in orbit.

      "The capabilities of the WGS system support our allies around the world in joint missions and support our military to be more effective," said Rico Atanasio, director of Boeing's tactical communications, "Moving forward as the need for sustainability in SATCOM is growing, I am confident that WGS will continue to be a key element in addressing the needs of secure secure communications. "

      Follow Stephen Clark on Twitter: @ StephenClark1 .


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