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Launches Delta 4 Launches 10th Broadband Air Force Satellite – Spaceflight Now



United Delta Launch Alliance 4 rockets are raised from the Cape Canaveral Air Force Station, Florida, on the tenth of the global satellite satellite satellite, Global SATCOM USA. Credit: Walter Scriptunas II / Spaceflight Now

The United Launch Alliance has launched a new satellite with an inflammatory explosion on Sunday night from Cape Canaveral, using the version of the Delta 4 missile that is approaching a retirement to supplement the signals of the American military network. from drones and commanders on the battlefield.

After the ground brigades removed several technical barriers to the missile and satellite surveillance network, the 218-foot RS-68A main engine, with Delta 4 diesel engine, with a height of 218 meters, flared up with an orange splash in minutes before lifting .

Later seconds, four solid-fuel engines lit up, and holding bolts released at 8:26 EDT on Saturday (0026 GMT Saturday) as Delta 4 quickly climbed from Cape Canaveral Complex 37b to a starting ground of 1.8 million pounds of traction.

The main engine and booster nozzles vectored by their thrust direct the Delta 4 eastward to the Atlantic Ocean, which directs the tenth broadband satellite satellite of the global SATCOM US Air Force to a final operating position of over 22,000 miles (almost 36,000 kilometers) above the Equator on Geostationary orbit

Delta 4 solid rocket accelerators built by Northrop Grumman and thrown in two pairs of about 1 minute, 40 seconds, to the mission. Once above the dense lower layers of the atmosphere, the Delta 4 released its nose cone to uncover the WGS 10.

The main Aerojet Rocketdyne RS-68A engine lasted nearly four minutes until the first stage reached the Atlantic Ocean. . The upper RL10B-2 engine, also supplied by Aerojet Rocketdyne, was lit twice to raise the WGS 10 spacecraft to an elliptical transfer orbit that reached 27,500 miles (44,300 kilometers) above the Earth.

the satellite detached from the top of the Delta 4 to T + plus 36 minutes, 50 seconds, expanding the series of successful missions to 133 years since its inception in 2006.

WGS 10. Credit: Boeing

The launch was delayed by 90 minutes so that engineers could consider the technical problems at the first and second stages of the Delta 4 missile. After these issues were cleared, the team the launch had to wait for officials to ensure that NASA's satellite tracking and data transmission system was ready to roam the telemetry from the rocket to the ground controllers.

The mission marked the next flight The Delta 4 missile variant, known as Delta 4-Medium, is known as Delta 4-Medium, as the ULA begins to break into segments of its seven launches, preparing for the debut of the new Vulcan amplifier, which says the company, will be cheaper than the existing Atlas and the Delta fleet.

Gary Wentz, vice president of Governmental and Commercial Programs UL, said that the company's 2014 decision to retire from Delta 4-Medium was intended to cut costs for the company.

the products we provided and found that the support of these two families of launch vehicles, both Delta and Atlas, during this period reduced our flight performance, and therefore increased our costs, "Tz said. "It really led to the fact that it is based on the competitive industry in which we are, trying to maximize our competitiveness."

The Seven Delta 4-Medium provides the same range of lifting capabilities as the less expensive Atlas-5 missile. The Delta 4-Heavy, which will remain in operation from at least the beginning of the mid-2020s, uses the first three Delta 4 cores that are connected to each other to extract heavy loads in orbit than any of the Atlas 5 configurations.

Formed in 2006 by the merger of the Boeing Delta 4 Missile and the Lockheed Martin Atlas 5. The joint venture "50-50" retained both missile lines to ensure that US troops had two independent variants for launching national security satellites.

But the "Falcon 9" and "Falcon Heavy" rockets from SpaceX are now certified to launch American national security. The families of Falcon and Atlas missiles will continue to have two variants of launch after the retirement of Delta 4 Medium. Author: Alex Polimeni / Spaceflight Now

Delta 4-Medium + 5.4 rocket version, with four solid rocket accelerators and a 5.1-meter high top and a payload casing were used for launching. It was the eighth and final configuration flight Delta 4-Medium + 5.4, and all conducted WGS satellites for the Air Force.

Another Delta 4-Medium rocket is set to launch on July 25 from Cape Canaveral with Air Forced Navigational GPS. This launcher will fly in the configuration of Delta 4-Medium + 4.2, with two solid rocket accelerators and a 4-meter diameter upper cascade and payload ramp. 39 times since November 2002, and 28 of these missions used Delta 4-Medium.

"It was a very successful story, and it looks like a WGS satellite, it's a working horse for the Air Force," said Ventz, Delta 4-Medium. "It's kind of bitter that we are here at the end, but we are looking forward to the missions that will come in the future and the vehicles we will be engaged in."

Including the launch of GPS in July, ULA has contracts for Delta 4 flights by 2024. The Delta 4-Heavy launches scheduled for the early 2020s will lift sensitive shipments to the National Intelligence Agency, a US government spy agency:

  • Delta 4-Medium + 4,2 with payload GPS 3 SV02 [19659022] Launch date: July 25, 2019
  • Launch site: SLC-37B, Cape Canaveral, Florida Air Force Station
  • Delta 4-Heavy with payload NROL-44
    • Launch date: 2020
    • Launch site: SLC-37B, Cape Canaveral, Florida Air Force Station
  • Delta 4-Heavy with payload NROL-82
    • Launch date: 2020
    • Launch site: SLC-6, Vandenberg airborne base, California
  • Delta 4-Heavy with payload NROL-91
    • Date of launch: 2022 fiscal year
    • Launch site: SLC-6, Vandenberg air base, California
  • Delta 4-Heavy with payload NROL-68
    • Launch date: Fiscal year 2023
    • Launch site: SLC-37B, Cape Canaveral, Florida Air Force Station
  • Delta 4-Heavy with payload NROL-70
    • Date of launch: 2024 fiscal year
    • Site of launch: SLC-37B, Cape Canaveral air force station, Florida
  • 9000 kilograms) The WGS 10 Satellite, launched on Friday, joins nine of the broadband satellites deployed since 2007 to form a global network that transmits video, data and other information between the field. battles and decision makers

    and unclassified signals that support the forces of the United States and allies around the world. With a digital sewer, a $ 400 million satellite 10 will transmit high-speed communications in the X-band and Ka-band frequencies during a mission that is expected to last at least 14 years.

    Ka-range reflectors of the WGS 10 satellites during deployment testing at the Boeing plant in El Segundo, California. "The WGS has a unique ability to cross-bounce between military Ka and X bands, which gives our militants considerable flexibility to maximize communication capabilities," said Tom Becht, director of the military satellite communications department at the Air Force Space and Rocket Systems Los Angeles

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

    Two of the 10 WGS satellites launched today are funded by international governments. WGS 6 was funded by Australia, and a consortium from Canada, Denmark, Luxembourg, the Netherlands and New Zealand paid for the WGS 9 satellite, launched in March 2017. In exchange for their contributions, these countries' military receive access to the WGS network.

    The WGS 10 is the fourth and final "Block II Follow-On" WGS satellite, and is the third with a digital sewage system that processes signaling more effectively, doubling the bandwidth provided by earlier spacecraft series .

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

    After two months of a geostationary orbit test in the United States, military leaders decide where to deploy WGS 10.

    Army Colonel Enrique Costas, Commander of the Defense Communications and Army Transmission Project, stated that the WGS network is widely used in military technology because of its reliability and bandwidth with high bandwidth, which allows live video transmission from drones all over the world to operators on hundreds or thousands of kilometers.

    "If I were to target a specific terrorist in the Middle East and I have an ISR (intelligence, surveillance, and intelligence) platform that looks like a terrorist, I should be able to decide whether to shoot or send a ground command to get that goal, "said Costas.

    High-definition video from a flying dron

    "I need to be able to transmit this signal from the point of collection to the center, where it will be decided whether to press the trigger," he said. or deploy a team to carry out a specific mission, "said Kostas to reporters in a pre-design conference call. "The WGS is one of the main ISRs for operational workforce in some theaters."

    The White House and the State Department also rely on WGS satellites, and the network transmits television signals to troops stationed around the world.

    … I have a teleconference between (the combatant) 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, "continued Kostas. "The WGS is part of this transport to make sure we have a reliable and guaranteed relationship no matter where we are on the planet."

    Air forces are close to awarding a new Boeing contract for at least one additional WGS satellite.

    The Congress added $ 600 million to the 2018 defense budget for two new CSG satellites, rejecting military plans to start searching for communications resources from commercial satellites. However, the financial line did not include money to launch satellites, each of which costs from 300 to 400 million dollars.

    The air force launched another round of WGS purchases using unexpected money, and Boeing made the offer in January. Military officials have not decided whether to order one or two satellites CSG, reports Becht. He said that the final decision and signing of the contract are expected later this year.

    Bechte stated that the UPU could follow the purchase model, which is often used by commercial satellite operators, in which Boeing would be responsible for building a new WGS spacecraft with more value. effective practices. Boeing can also choose a launch vendor for the new WGS spacecraft, combining the entire contract with the turnkey contract, with the final supply of the Air Force satellite after its orbit.

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

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    Follow Steven Clark on Twitter: @ StephenClark1 .


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