Blogarchiv
Raumfahrt - Startvorbereitung für Atlas 5 mit USAF AEHF 5 Satelliten

28.04.2019

Atlas 5 rocket, U.S. Air Force satellite arrive at Cape Canaveral for June launch

20190422153241-110943-678x452

The first stage of ULA’s Atlas 5 rocket is unloaded from the Mariner transport ship after arriving at Cape Canaveral on April 21. Credit: United Launch Alliance

Atlas 5 rocket hardware and a U.S. Air Force communications satellite have arrived at Cape Canaveral for United Launch Alliance’s next mission, scheduled for liftoff June 27.

The equipment arrived at the Florida spaceport last weekend on separate shipments aboard an Air Force C-5 cargo plane and and ULA’s Mariner transport vessel.

The Air Force’s fifth Advanced Extremely High Frequency communications satellite rode a C-5 airlifter from Lockheed Martin’s factory in Sunnyvale, California, and arrived at Cape Canaveral on April 20. The rocket-carrying Mariner transport ship arrived at Port Canaveral on April 21 after a trip from ULA’s manufacturing plant in Decatur, Alabama, delivering the first and second stages of AEHF 5’s Atlas 5 launcher.

Teams will spend the next couple of months readying AEHF 5 and the Atlas 5 rocket for liftoff June 27 from Cape Canaveral’s Complex 41 launch pad. The mission will mark the 80th flight of an Atlas 5 rocket since 2002, and the first Atlas 5 launch of the year.

The Atlas 5, designated AV-083, will launch in its most powerful variant with five strap-on solid rocket boosters built by Aerojet Rocketdyne and a 5-meter-diameter (17.7-foot) payload fairing made by Ruag Space, a configuration known as the Atlas 5-551 that has flown nine times before. The five solid-fueled motors will provide an extra boost to the Atlas 5’s first stage, powered by a Russian-made RD-180 main engine that burns kerosene and liquid oxygen propellants.

The combined power of the boosters and main engine will give the Atlas 5 around 2.6 million pounds of thrust at liftoff.

20190422153241-105132-678x452

ULA’s Mariner transport ship carries rocket hardware from the company’s factory in Decatur, Alabama, to launch sites in Florida and California. Credit: United Launch Alliance

Workers unloaded the Atlas 5’s first stage and Centaur upper stage, powered by an Aerojet Rocketdyne RL10 engine, from the Mariner transport ship Monday. ULA teams transferred the first stage to the Atlas Space Operations Center for checkouts before it is stacked vertically on the mobile launch platform at the Complex 41 launch pad. The Centaur upper stage will be be integrated with an interstage adapter and the lower part of the Atlas 5’s payload shroud in the coming weeks, according to ULA.

Ground crews will hoist the Atlas 5 first stage, five solid rocket boosters and the Centaur upper stage on the mobile launch table inside the Vertical Integration Facility at Complex 41. Working in a nearby clean room, technicians will fuel the AEHF 5 satellite and encapsulate the spacecraft inside the Atlas 5’s nose cone before raising the payload atop the launcher inside the VIF.

The launch of AEHF 5 follows Atlas 5 missions that deployed four previous AEHF satellites in 2010, 2012, 2013 and 2018.

The AEHF satellites provide secure communications services to the U.S. military, working together in a network the Air Force says is resilient to jamming, cyber attacks, and even nuclear war. The AEHF spacecraft are positioned in geostationary orbit more than 22,000 miles (nearly 36,000 kilometers) over the equator, using a cross-linked architecture allowing the satellites to relay signals between one another without transmitting to ground stations.

The spacecraft are built by Lockheed Martin, with communications payloads produced by Northrop Grumman.

150113-f-ot300-030-678x542

Artist’s concept of an AEHF satellite in orbit. Credit: U.S. Air Force/Lockheed Martin

“The payload supports communication missions with increased coverage, capacity, and protections against electronic jamming which gives our warfighters the best advantage against our adversaries,” said Brig. Gen. Steve Whitney, program executive officer for the Space Production Corps.

The AEHF network is also used by Canada, the United Kingdom and the Netherlands, and replaces the Air Force’s aging Milstar constellation.

Quelle: SN

----

Update: 30.04.2019

.

Lockheed Martin's AEHF-4 On-Orbit Test Proves Successful And Marks First Of Its Kind

 

SUNNYVALE, Calif., April 29, 2019 /PRNewswire/ -- Lockheed Martin (NYSE: LMT) is excited to announce the successful completion of AEHF-4 spacecraft on-orbit test and available for Satellite Control Availability (SCA).

The AEHF-4 on-orbit test (A4 OOT) successfully activated the payload, built by its major subcontractor, Northrop Grumman, and demonstrated that AEHF-4 met all of its requirements. A4 OOT was the first ever test to have all six AEHF operational terminals communicating over XDR. The terminal types include AEHF SMART-T, FAB-T, MMPU, NMT, Global ASNT and ACF-IC2.

1-17

"This is a major milestone to celebrate with our customers at Space and Missiles Systems Center (SMC) the U.S. Air Force and our teammates Northrop Grumman, L3 Communications and Aerojet. As we turn our focus on launching AEHF-5 in June, one month early, I want to congratulate everyone involved in completing this one of a kind, high-performance network in space. This is a tremendous accomplishment for the AEHF program and I am proud of the team for consistently exceeding the customer's mission needs," said Mike Cacheiro, vice president of Protected Communications for Military Space.

The addition of AEHF-4 to the constellation provides a new capability of global extended data rate (XDR) communications. XDR communications provides data rates to its users five times higher than medium data rate (MDR) and 350 times higher than low data rate (LDR) communications. Milstar, the predessor to AEHF, uses both LDR and MDR communication modes to directly support the warfighter.

This was the last step before control authority of the satellite is handed over to the U.S. Air Force SMC where it will join the combined AEHF-Milstar constellation. 

The AEHF constellation provides global, survivable, highly secure and protected communications for strategic command and tactical warfighters operating on ground, sea and air platforms. The jam-resistant system also serves international partners including Canada, the Netherlands and the United Kingdom.

Quelle: Lockheed Martin

----

Update: 21.05.2019

.

ULA begins stacking Atlas 5 rocket for late June launch

20190518145645-517624

The first stage of ULA’s Atlas 5 rocket arrives at Cape Canaveral’s Complex 41 launch pad Friday. Credit: United Launch Alliance

The bronze first stage of United Launch Alliance’s next Atlas 5 rocket arrived at its Cape Canaveral launch pad Friday, where it will be joined by five solid-fueled boosters, a Centaur upper stage and a U.S. Air Force communications satellite in the coming weeks ahead of liftoff set for June 27.

Riding on a specially-outfitted trailer, the rocket’s first stage was trucked from the Atlas Space Operations Center at Cape Canaveral Air Force Station to the nearby Complex 41 launch pad, where cranes lifted the 107-foot-long (32-meter) stage vertical and placed it on a mobile platform inside the Vertical Integration Facility.

ULA workers will next install five strap-on solid rocket boosters, manufactured by Aerojet Rocketdyne, around the base of the Atlas 5’s first stage. A Centaur upper stage will be hoisted atop the Atlas 5, and the rocket’s build-up at Cape Canaveral will be capped with the addition of the Air Force’s fifth Advanced Extremely High Frequency communications satellite next month.

The AEHF 5 satellite will be the sole payload on the Atlas 5 rocket when it lifts off from Florida’s Space Coast.

The launch is scheduled for June 27 during a two-hour window that opens at 6 a.m. EDT (1000 GMT).

The Atlas 5, designated AV-083, will launch in its most powerful variant with five strap-on solid rocket boosters built by Aerojet Rocketdyne and a 5-meter-diameter (17.7-foot) payload fairing made by Ruag Space, a configuration known as the Atlas 5-551 that has flown nine times before. The five solid-fueled motors will provide an extra boost to the Atlas 5’s first stage, powered by a Russian-made RD-180 main engine that burns kerosene and liquid oxygen propellants.

The combined power of the boosters and main engine will give the Atlas 5 around 2.6 million pounds of thrust at liftoff.

The June 27 launch will mark the first Atlas 5 flight of the year, and the 80th Atlas 5 launch since the rocket debuted in August 2002. It will be ULA’s third mission of 2019, following two Delta 4 launches earlier in the year.

Built by Lockheed Martin, the AEHF satellites provide secure communications services to the U.S. military, working together in a network the Air Force says is resilient to jamming, cyber attacks, and even nuclear war. The AEHF spacecraft are positioned in geostationary orbit more than 22,000 miles (nearly 36,000 kilometers) over the equator, using a cross-linked architecture allowing the satellites to relay signals between one another without transmitting to ground stations.

The AEHF 5 satellite’s launch comes after the launch of four previous AEHF spacecraft in 2010, 2012, 2013 and 2018, all on Atlas 5 rockets.

Once the Atlas 5 rocket carrying the AEHF 5 satellite blasts off from Cape Canaveral, the launch campaign for the following Atlas 5 mission will begin in July with the stacking of a new rocket assigned to send Boeing’s CST-100 Starliner crew capsule into orbit on an unpiloted test flight to the International Space Station.

The Starliner’s test flight is scheduled for liftoff no earlier than Aug. 17, and the demonstration mission will pave the way for crewed launches using the Atlas 5 rocket and Starliner capsule, perhaps as soon as late this year.

Quelle: SN

----

Update: 6.06.2019

.

ULA rocket arrives on Space Coast from Alabama factory

- It was a symbolic and important moment for The Boeing Company and for manned space missions, as a rocket booster arrived on Space Coast on Wednesday. 

The booster was made in Alabama and came to Cape Canaveral on a cargo ship. It will carry United Launch Alliance's Starliner capsule, a competitor of SpaceX.

“It’s another milestone on the way to reclaiming that ability to be able to send humans to the International Space Station,” said Josh Barrett, a Boeing spokesman.

ULA hopes it will make history. The booster was manufactured in Decatur, Alabama. Other parts of the system come from there too. To transport the pieces to Space Coast, that literally involves a slow boat. But the company is excited because it says now things will start to move quicker -- the parts are where they need to be.  They are assembled at a ULA facility near their launch site.

ula-rocket-booster-1559779656981-7357017-ver10-1280-720

“This is the Atlas 5 booster, that’s also known as the first stage, it’s got a kerosene burning and oxygen engine on it,” Barrett said.

Quelle: FOX 35

----

Update: 11.06.2019

.

AEHF-5 Encapsulated Ahead of June Launch

LOS ANGELES AIR FORCE BASE, Calif. --

The U.S. Air Force’s fifth Advanced Extremely High Frequency (AEHF-5) communication satellite was encapsulated June 5 at Astrotech Space Operations processing facility in Florida.

The encapsulation of AEHF-5 in the United Launch Alliance Atlas V launch vehicle payload fairing is a significant milestone in AEHF-5’s launch process as it marks the completion of all major testing activity prior to launch.  AEHF-5 is now ready to make the journey to Space Launch Complex-41, where it will be mated with its Atlas V launch vehicle.  The launch window is currently scheduled to open at 06:00 a.m. EDT on June 27.

AEHF is a joint service satellite communications system that will provide survivable, global, secure, protected, and jam-resistant communications for high-priority military ground, sea, and air assets.  The AEHF system is the follow-on to the Milstar system, augmenting, improving, and expanding the Department of Defense's MILSATCOM architecture.

AEHF-5 was procured from Lockheed Martin Space Systems Company by the MILSATCOM Systems Directorate, part of the Air Force's Space and Missile Systems Center.  The MILSATCOM Systems Directorate plans, acquires, and sustains space-based global communications in support of the President, Secretary of Defense, and combat forces.  The MILSATCOM enterprise consists of satellites, terminals and control stations, and provides communications for more than 16,000 air, land, and sea platforms.

Quelle: USAF

+++

Atlas V 551 takes shape for AEHF-5 satellite launch
20190518145645-517624-1

The Atlas booster stage arrives at VIF just after sunrise today. Photo: United Launch Alliance

 

aehf-5-mission

 It will require a substantial amount of energy to launch the Air Force's fifth Advanced Extremely High Frequency (AEHF-5) military communications satellite to its lofty orbit above Earth, and United Launch Alliance technicians are readying the powerful Atlas V rocket that will perform the mission.

Five solid rocket boosters (SRBs) and the Centaur upper stage have been attached to the first stage at ULA’s Vertical Integration Facility (VIF) at Cape Canaveral Air Force Station, completing the initial buildup of the launch vehicle.

The work follows the first stage hoisting aboard the mobile launch platform (MLP) on May 17.

The SRBs are known as AJ-60As and each deliver 380,000 pounds of peak thrust during launch. Aerojet Rocketdyne has supplied 110 SRBs flown on Atlas V since 2003 with a flawless track record.

Mating of the Centaur continued ULA's efficiency process known as OVI, or Off-site Vertical Integration. In a separate facility last month, the Centaur was raised upright and mated to the interstage adapter that will connect to the Atlas first stage. Technicians then fitted the lower sections of the payload fairing and a stiffener deck around the stage.

The fully assembled structure was brought to the VIF for hoisting atop the rocket. The OVI eliminates multiple lifting operations at the VIF and saves several days in the pre-launch schedule.

The hydrogen-fueled Centaur will employ the long-duration coast and multiple restart capabilities of its Aerojet Rocketdyne RL10C-1 cryogenic engine to fire three times during the five-and-a-half-hour launch sequence to deliver the AEHF-5 satellite to a highly optimized geosynchronous transfer orbit.

With the Atlas V now assembled, the rocket will come alive with the application of power to undergo extensive testing to ensure systems are checked and validated for the launch. 

Later in June, the encapsulated payload will arrive at the VIF from its payload processing facility and lifted atop the rocket, completing the 197-foot-tall Atlas V. 

ULA is scheduled to launch the AEHF-5 spacecraft for the U.S. Air Force Space and Missile Systems Center on June 27.

Quelle: ULA

 

1691 Views