Posted on by Nancy Atkinson

DARPA Moving Ahead with Building Zombie Frankensatellites

Caption: Phoenix satellite concept. Credit: DARPA

“Alien” meets “Bride of Frankenstein” and “Night of the Living Dead?” Straight from a possible sci-fi/horror movie mashup, the Defense Advanced Research Projects Agency (DARPA) wants to harvest components from dead, non-working “zombie” satellites to build new ones in space, all done remotely via a grasping, mechanical arm.

The agency would like to have the first keystone mission of what is called the Phoenix Program up and running by 2015, and they recently announced that several companies and NASA’s Jet Propulsion Lab have won a share of a $36 million contract award to help develop the technology to assemble new satellites from old, dead ones.

This project would harvest larger working parts, such as antennas and solar arrays from satellites that have otherwise have failed and are still in geosynchronous orbit, 35,000 kilometers (22,000 miles) above Earth. DARPA envisions robotically removing and re-using these parts from decommissioned satellites by developing a new class of very small ‘satlets,’ similar to nano satellites, which could “ride along” other commercial satellite launches, greatly reducing launch costs, DARPA says.

The satlets would attach themselves to the antenna or solar array of a non-functional satellite, remove the part and move it to a different orbit where a satellite servicing spacecraft is waiting to robotically operate on and build a new satellite while in orbit. The servicing satellite would be equipped with grasping mechanical arms for removing the satlets and components. These unique space tools are what needs to be developed for the program.

The robotic arms/grappling tools will be controlled remotely from Earth. The pieces will then be reconfigured into a new free-flying space system and operated independently to demonstrate the concept of space re-use.

DARPA is interested in building communication satellites to provide 24-hour communication capabilities for the military.

“Today, when a communication satellite fails, it usually means the expensive prospect of having to launch a brand new replacement communication satellite,” DARPA’s Phoenix Program webpage says. “The goal of the Phoenix program is to develop and demonstrate technologies to cooperatively harvest and re-use valuable components from retired, nonworking satellites in GEO and demonstrate the ability to create new space systems at greatly reduced cost.”

Among the companies that have a share in creating the components needed to make Phoenix a reality are Altius Space Machines, Space Systems/Loral; Intelsat; MacDonald, Dettwiler and Associates; Honeybee Robotics; and JPL.

Some of the technology DARPA expects to be built for the Phoenix program include:

Radiation tolerant micro-electronics and memory storage
Industrial robotics end effectors and tool changeout mechanisms and techniques
Computer-assisted medical robotics micro-surgical tele-presence, tools and imaging
Remote imaging/vision technologies

Watch DARPA’s video on the Phoenix Program:

For more information, see the DARPA Phoenix webpage.

Posted on by Ken Kremer

NROL-15 Spysat and Delta 4 Heavy – Cape Launch Photo Gallery

Image caption: An upgraded Delta 4 Heavy rocket and super secret spy satellite roar off pad 37 on June 29, 2012 from Cape Canaveral, Florida. Credit: Jeff Seibert/wired4space.com

Here’s a launch photo gallery showing the blastoff of the NROL-15 top secret intelligence gathering satellite atop a mighty Delta 4 Heavy booster from colleagues with a variety of perspectives on 29 June 2012 from Cape Canaveral, Florida

The spy satellite was lofted to orbit by the United Launch Alliance Delta 4 Heavy booster for the National Reconnaissance Office (NRO).

Sometime in 2014 the first space bound Orion capsule will blastoff atop a Delta 4 Heavy booster.

Delta 4 Heavy rocket and super secret spy satellite roar off pad 37 on June 29, 2012 from Cape Canaveral, Florida. Credit: Jeff Seibert/wired4space.com

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Jun 29, 2012 Delta 4 Heavy NROL-15 launch photos – Credit: Alan Walters/awaltersphoto.com

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Delta 4 Heavy rocket with top secret spy satellite thunders off Pad 37 on June 29, 2012 from Cape Canaveral, Florida. Credit: Ken Kremer/kenkremer.com

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Delta 4 Heavy rocket and super secret spy satellite roar off pad 37 on June 29, 2012 from Cape Canaveral, Florida. Credit: Jeff Seibert/wired4space.com

Ken Kremer

Posted on by Ken Kremer

Stupendous ‘Spysat Sunrise’ at the Cape

Sun rises behind Delta 4 Heavy launch of NROL-15 for the NRO on June 29, 2012 from Cape Canaveral Air Force Station at Space Launch Complex-37. Credit: Ken Kremer/kenkremer.com

Image caption: ‘Spysat Sunrise’ and Delta 4 Heavy booster at Cape Canaveral, Florida prior to successful June 29, 2012 blastoff from Pad 37 at 9:15 a.m. EDT. Credit: Ken Kremer

Some lucky Florida Space Coast spectators were unexpectedly treated to a glorious “Spysat Sunrise” when the June 29 liftoff of the powerful Delta 4 Heavy booster lofting a super secret spy satellite for the National Reconnaissance Office (NRO) was postponed several hours from its originally scheduled predawn launch time.

The sight of the orange and white triple barreled Delta booster and the multi hued sunrise show lasting several minutes was gorgeous beyond compare.

Image caption: ‘Spysat Sunrise’ and Delta 4 Heavy booster at Cape Canaveral, Florida prior to successful June 29, 2012 blastoff from Pad 37 at 9:15 a.m. EDT. Credit: Ken Kremer

As a result of the sudden, last minute launch time postponement amidst blistering Florida heat in the middle of mosquito infested waters, some folks got a super “consolation prize” – a magnificent sunrise behind the Delta 4 Heavy rocket launch pad at Space Launch Complex 37 (SLC-37) on Cape Canaveral Air Force Station, Florida.

That is for those who were fortunate enough to be unwittingly watching from exactly the right spot at the right time. The photos were shot from about 3 miles away on the NASA Causeway.

Image caption: An upgraded Delta 4 Heavy rocket and super secret spy satellite roar off Pad 37 on June 29, 2012 from Cape Canaveral, Florida. Credit: Ken Kremer

The goal of the mission was to deliver the NROL-15 satellite to orbit for the National Reconnaissance Office (NRO) to conduct unspecified intelligence gathering operations for US military forces located around the globe.

Read more about the United Launch Alliance Delta 4 Heavy Spy satellite launch in my mission related articles starting here as well as the prior week’s June 20 NROL-38 NRO spysat launch – here and here.

Ken Kremer

Posted on by Ken Kremer

Super Secret Spy Satellite Soars Spectacularly to Space on Delta 4 Heavy Booster

Image caption: An upgraded Delta 4 Heavy rocket and super secret spy satellite roar off pad 37 on June 29, 2012 from Cape Canaveral, Florida. Credit: Ken Kremer

A super secret spy satellite for the National Reconnaissance Office (NRO) soared spectacularly to space today (June 29) aboard a Delta 4 Heavy Booster – America’s most powerful rocket following the retirement of NASA’s venerable Space Shuttle Orbiters.

Liftoff of the mammoth Delta 4 Heavy rocket – composed of a trio of liquid fueled common core boosters – finally came at 9:15 a.m. EDT about 3 hours late after a variety of technical issues halted the countdown three times at less than 4 minutes from liftoff from Space Launch Complex 37 on Cape Canaveral Air Force Station, Florida.

Heavy rains and flooding from Tropical Storm Debby had forced a 1 day launch delay from June 28.

The 232 foot tall United Launch Alliance (ULA) Delta lifted off into a magnificent clear blue sky atop the rumbling thunder of three upgraded boosters strapped together side by side and it gradually arced over to the East on the way to orbit.

Both side attached boosters jettisoned as planned. After the second stage engine ignited and the payload fairing separated, the flight went into a preplanned communications black out for the remainder of the flight to orbit and the entire intelligence mission ahead for the hush, hush NROL-15 satellite.

“Today’s successful launch of the NROL-15 mission is the third of four launches for the NRO this year and the second EELV launch for the NRO in just nine days,” said Jim Sponnick, ULA vice president, Mission Operations. “We congratulate the combined NRO , U.S. Air Force and ULA team along with our mission partners for their continued focus on mission success as we deliver the critical capabilities to support the soldiers, sailors, airmen and Marines.”

Just last week on June 20, a ULA Atlas 5 booster lofted the secret NROL-38 satellite for the NRO.

This was only the 6th launch of the Delta 4 Heavy booster and the inaugural flight featuring the upgraded RS-68A Liquid Hydrogen/Liquid Oxygen first stage engines. Each improved engine delivers some 797,000 pounds of thrust vs 758,000 pounds in the prior version – an increase of 39,000 pounds. A single RL 10 engine powered the second stage.

“The upgraded Delta IV Heavy vehicle was developed with an extremely thorough and comprehensive system engineering process by the ULA and Pratt-Whitney Rocketdyne teams, along with substantial involvement by our U.S. government customers,” said Sponnick. “Congratulations to the entire team on today’s successful inaugural flight of the upgraded Delta IV Heavy launch vehicle and the RS-68A engine.”

Ken Kremer

Posted on by Ken Kremer

Mighty Delta 4 Heavy Rocket and Clandestine Satellite Poised at Pad

Image caption: The Delta 4 Heavy rocket and Super secret payload stand poised for launch at 6:13 a.m. EDT on June 29, 2012 following retraction of the mobile service tower. Credit: Ken Kremer

A mighty triple-barreled Delta 4 Heavy rocket with a clandestine military satellite perhaps the size of Hubble was unveiled this evening (June 28) at a seaside launch pad at Cape Canaveral, Florida.

The 232 foot tall rocket is poised to blast off at 6:13 a.m. EDT from Space Launch Complex 40 at Cape Canaveral Air Force Station. The exact launch window, like everything else about the classified mission and the NROL-15 spy satellite is top secret.

The mobile service tower was retracted from around the absolutely gorgeous white and orange colored rocket starting around 8:30 p.m. and the super secret spy satellite being launched for the National Reconnaissance Office (NRO) – see my photos.

The launch was delayed a day by the lingering devastation caused by Tropical Storm Debby.

Image caption: Delta 4 Heavy rocket and top secret NRO payload are poised for launch on June 29. Credit: Ken Kremer/www.kenkremer.com

The United Launch Alliance Delta 4 Heavy is flying for the first time with upgraded RS-68A first stage engines, each of which delivers 720,000 pounds of thrust.

This will be the 6th launch of the Delta 4 Heavy – now the most powerful rocket in the US fleet following the shutdown of NASA’s Space Shuttle Program.

As of 12:45 a.m. June 29 , the countdown is now underway ! Fueling will commence shortly. Stay tuned for a post – launch report

Ken Kremer

Posted on by Ken Kremer

Debby Dousing Delta 4 Heavy Launch Hopes for June 28

Image Caption: National Reconnaissance Office (NRO) spy satellite arrives at Cape Canaveral Launch Pad 37 for mounting on top Delta 4 Heavy Rocket slated for June 28, 2012 blastoff. Credit: United Launch Alliance
See Photo Gallery below

Debby is doing a real number on vast swaths of Florida, dumping up to 15 inches of rain, unleashing deadly tornadoes and dousing hopes of launching a mighty triple barreled Delta IV Heavy rocket on Thursday morning, June 28, with a super secret spy satellite for the National Reconnaissance Office (NRO).

Tropical Storm Debby has destroyed homes, killed at least 1 person and will wreak havoc as it tracks across central Florida from the Gulf Coast to the Atlantic Coast over the next two days – just north of Cape Canaveral, Florida and the Delta 4 Heavy launch pad at Space Launch Complex 37.

The last Delta 4 Heavy to blast off from Cape Canaveral Air Force Station on Nov 21, 2010. Credit: Alan Walters – awaltersphoto.com

The odds of launching the United Launch Alliance (ULA) Delta 4 Heavy on June 28 have dropped to just 30 percent favorable. The outlook improves slightly to 40 % favorable on Friday, June 29 according to the official Air Force weather forecast.

The launch window for Thursday’s ULA Delta 4 Heavy launch stretches from 6:16 a.m. to 10:30 a.m. and comes just 8 days after the last spy satellite blasted off on an Atlas V rocket from Cape Canaveral on June 20 – launch story here.


Image Caption: Fog and heavy rain obscure view of triple barreled Delta 4 Heavy rocket protected inside Mobile Gantry from outside high security perimeter gate at Launch Pad 37 on Cape Canaveral Air Force Station, Florida.
Credit: Ken Kremer/www.kenkremer.com

The clandestine NROL-15 payload was bolted atop the Delta 4 Heavy booster several weeks ago.

See the photo gallery below provided to Universe Today showing the shrouded upper stage being hoisted on top of the booster.

This will be only the 6th launch of the 232 foot tall Delta 4 Heavy booster and the first one to feature the upgraded RS-68A first stage engines, delivering 702,000 pounds of thrust each.

A suspect vent relief rocket valve was successfully changed out by technicians over the weekend and will not delay the launch, ULA spokesperson Jessica Rye told Universe Today.

The powerful Delta 4 Heavy rocket and NROL-15 payload are due to be unveiled at pad 37 on Wednesday evening, June 27- depending on Debby !. .

Ken Kremer

Photo Gallery: NROL-15 Spy satellite delivery and mounting atop Delta 4 Heavy Rocket at Cape Canaveral Air Force Station – Space Launch Complex 37. Credit: United Launch Alliance

Posted on by Ken Kremer

Hush, Hush US Spy Satellite Blasts Off atop Milestone Atlas Rocket

Image Caption: Spy Satellite for the U.S. National Reconnaissance Office blasts off atop Atlas V rocket from Cape Canaveral, Florida at 8:28 a.m. EDT. Credit: Jeff Seibert/wired4space.com

A top secret US national security Spy satellite for the National Reconnaissance Office (NRO) roared mightily to space this morning (June 20) through picturesque layers of broken clouds an Atlas V rocket at 8:28 a.m. EDT (1228 GMT) from Space Launch Complex-41 on Cape Canaveral Air Force Station, Fla.

Basically nothing is publicly known about the specifications or mission of the vital payload, dubbed NROL-38, launched in support of America’s national defense.

The classified mission entered a total news blackout and cutoff of the live webcast some five minutes after launch when the rocket’s first stage and upper stage engine separated successfully and before the secret satellite was deployed and reached orbit.

The flight marked a key milestone as the 50th successful launch of the combined Atlas V and Delta IV booster families collectively known as the Evolved Expendable Launch Vehicle (EELV) built by United Launch Alliance (ULA). The maiden launch took place in 2002.

Image Caption: NROL-38 Spy Satellite soars to space on an Atlas V rocket from Cape Canaveral, Florida at 8:28 a.m. EDT on Jun 20, 2012. Credit: Jeff Seibert/wired4space.com

ULA was formed in 2006 as a partnership between Boeing and Lockheed Martin who were originally in competition at the start of the EELV program.

“This morning’s flawless launch is the product of many months of hard work and collaboration of government and industry teams. We hit it out of the park again as we continue to deliver superior vigilance from above for the Nation,” remarked Col James D. Fisher, Director of Office of Space Launch.

Threatening clouds and gusting winds remained within acceptable levels and did not delay the launch.

The 19 story Atlas booster first stage was powered by the RD AMROSS RD-180 engine and the Centaur upper stage was powered by a single Pratt & Whitney Rocketdyne RL10A-4 engine.


Image Caption: NROL-38 Spy Satellite liftoff on June 20, 2012 atop Atlas V rocket from Cape Canaveral, Florida. Credit: Ken Kremer/www.kenkremer.com

“Congratulations to the NRO and to all the mission partners involved in this critical national security launch,” said Jim Sponnick, ULA vice president, Mission Operations. “This launch marks an important milestone as we celebrate the 50th successful Evolved Expendable Launch Vehicle (EELV) mission, with 31 Atlas V and 19 Delta IV missions flown since August 2002.”

The NROL-38 spy satellite is the first of three critical NRO missions slated for launch by ULA over the next two months. The NRO is based in Chantilly, Va. and the U.S. Government agency responsible for designing, building, launching, and maintaining America’s intelligence satellites.

Indeed the next NRO satellite is currently scheduled for blastoff in the early morning hours of June 28 atop a Delta 4 Heavy booster rocket, now the most powerful rocket in the US arsenal following the forced retirement of NASA’s trio of Space Shuttle orbiters and which will surely put on a spectacular sky show !

The likewise classified NROL-15 mission will lift off next Thursday from Space Launch Complex-37 at Cape Canaveral.



Image Caption: NROL-38 Spy Satellite liftoff on June 20, 2012 atop Atlas V rocket from Cape Canaveral, Florida. Credit: Ken Kremer

The EELV Program was developed by the United States Air Force to provide assured access to space for Department of Defense and other government payloads, achieve significant cost savings and reliably meet launch schedule targets as older booster such as the Titan were phased out.

“Twelve of the 50 EELV launches have been NRO missions and these have been vital to our overall mission of delivering on commitments critical to our national security,” said Bruce Carlson, director, National Reconnaissance Office. “I thank and congratulate ULA and the EELV program for the tremendous performance and achievement of this very impressive and noteworthy milestone.”


Image Caption: NROL-38 Spy Satellite atop Atlas V rocket pierces cloud layers after liftoff on June 20, 2012. Credit: Ken Kremer

ULA will be getting some competition. SpaceX Corporation – which recently dispatched the first private spacecraft (Dragon) to dock at the ISS – will compete in the bidding to launch future US national security payloads.

Ken Kremer

Posted on by Ken Kremer

Top Secret Air Force Mini Shuttle lands after Record-Setting Stay in Space

Image Caption: 2nd X-37B Orbital Test Vehicle Successfully Completes 1st Flight by landing at Vandernberg AFB, Calif., on June 16, 2012. The record setting mission lasted 469 days in earth orbit. Designed to be launched like a satellite and land like an airplane, the second X-37B Orbital Test Vehicle, built by Boeing for the United States Air Force’s Rapid Capabilities Office, is an affordable, reusable space vehicle. Credit: Boeing.
See landing video below

The 2nd of the US Air Force’s top secret X-37B unmanned, reusable mini shuttles safely landed on Saturday, June 16, at 5:48 a.m. Pacific local time at Vandenberg Air Force Base, California to conclude a record setting classified 469 day experimental test flight in Earth orbit.

This was the first flight of OTV-2 and the second flight of the military’s classified X-37B Orbital Test Vehicle (OTV) test program for the U.S. Air Force Rapid Capabilities Office.

The reusable space plane is designed to be launched like a satellite and land on a runway like an airplane and NASA space shuttle. The X-37B is one of the newest and most advanced reentry spacecraft.

Here is the YouTube landing video released by the US Air Force:

OTV-2 was launched atop a United Launch Alliance Atlas V booster from Cape Canaveral Air Force Station, Fla., on March 5, 2011.

About 18 minutes after launch, the Air Force imposed a news blackout on the classified mission. Details about the cargo and experiments loaded aboard the Air Force orbital space plane are shrouded behind a veil of military security.

It is not known if the X-37B conducted reconnaissance activities during the test flight. It does have the capability to deploy satellites in space

The Air Force says the primary mission goal was to check out the vehicles capabilities and testing the ability to send experiments to space and return them safely.


Image caption: Top secret Air Force X-37B OTV mini space shuttle is encapsulated in 5 meter payload fairing and bolted atop an Atlas 5 rocket at Pad 41 at Cape Canaveral Air Force Station, Florida prior to 5 March 2011 launch. This up close view of the nose cone holding the classified X 37-B shows the umbilical line attachments. Credit: Ken Kremer

The mission duration of well over one year far exceeded the 220-day mission duration of the first OTV craft and tested additional capabilities. Two OTV vehicles have been built by Boeing. The first craft, known as OTV-1, was the United States’ first unmanned vehicle to return from space and land on its own.

Previously, NASA space shuttles piloted by astronauts were the only space vehicles that had demonstrated the capability of returning to Earth and being reused.

“The vehicle was designed for a mission duration of about 270 days,” said Lt. Col. Tom McIntyre, the X-37B program manager in an Air Force statement. “We knew from post-flight assessments from the first mission that OTV-1 could have stayed in orbit longer. So one of the goals of this mission was to see how much farther we could push the on-orbit duration.”

The 11,000 pound state-of -the art reusable OTV space plane was built by Boeing and is about a quarter the size of a NASA space shuttle. It was originally developed by NASA but was transferred to the Defense Advanced Research Projects Agency (DARPA) in 2004.

“With the retirement of the space shuttle fleet, the X-37B OTV program brings a singular capability to space technology development,” McIntyre said. “The return capability allows the Air Force to test new technologies without the same risk commitment faced by other programs”

Among the cutting-edge technologies tested were the auto de-orbit capability, thermal protection tiles, and high-temperature components and seals.

“The X-37B’s advanced thermal protection and solar power systems, and environmental modeling and range safety technologies are just some of the technologies being tested,” said McIntyre. “Each mission helps us continue to advance the state-of-the-art in these areas.”


Image caption: Blastoff of the X-37B Orbital Test Vehicle (OTV) atop an Atlas V rocket on March 5, 2011 from Space Launch Complex-41 (SLC-41) at Cape Canaveral Air Force Station, Florida. Credit: Ken Kremer

OTV-1 may lift off as early as October 2012 from Cape Canaveral.

“We look forward to the second launch of OTV-1 later this year and the opportunity to demonstrate that the X-37B is an affordable space vehicle that can be repeatedly reused,” said Paul Rusnock, Boeing vice president of Government Space Systems.

Read my X-37B OTV-2 pre-launch report and see my up-close photo album of the Atlas launch pad – here

Ken Kremer

Posted on by Nancy Atkinson

Secret X-37B Mini Space Shuttle Could Land Today

The first X-37B landing in 2010. Credit: Vandenberg Air Force Base.

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After more than a year in orbit, the US Air Force’s clandestine mini-space shuttle will likely land at Vandenberg Air Force Base in California sometime this week, with some reports saying it could land as early as today, Wednesday, June 13, 2012. It has been in orbit since March 5, 2011, but like the first X-37B mission that flew in 2010 and spent 224 days in space, the Air Force has not issued any information of what the craft is doing or where it is orbiting. However, amateur skywatchers and amateur satellite trackers have been keeping an eye on where the OTV-2 has been.

After launch it had a 331 km (206-mile)orbit inclined 42.8 degrees to the equator, but in the summer of 2011 the orbit was raised slightly to 337 km (209 miles).
The craft looks like a miniature space shuttle, and is 8.8 meters (29 feet) long with a wing span of 4.2 meters (14 feet). It can weigh up to about 5,000 kg (11,000 pounds) fueled for launch. The reported in-space design life is 270 days, but sources say that good performance on this mission enabled ground controllers to keep it aloft significantly longer.

Jeremy Eggers, a spokesman for the 30th Space Wing at Vandenberg was quoted by ABC News that the spacecraft’s first available landing opportunity will be Wednesday, depending on weather and technical conditions. The landing window extends through June 18, but Eggers says any landing is a “day-by-day situation based on the conditions.”

Posted on by Nancy Atkinson

Secretive X-37B Space Plane Will be Landing Soon

X-37B after its first mission in 2010. Credit: 30th Wing, Vandenberg Air Force Base.

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After nearly 15 months on a secret mission, the Air Force’s X-37B, an unmanned, reusable space plane, will soon be coming back home. A news release from the Vandenberg Air Force Base says the landing is expected to occur during the early- to mid-June timeframe, although the exact landing date and time will depend on technical and weather considerations. The mini space plane has been in orbit since March 5, 2011.

This is the second mission of the Orbital Test Vehicles to fly in the X-37B program with the second space plane, OTV-2. The first X-37B mission flew in 2010, spending 224 days in space. This original vehicle has been refurbished and is scheduled to go back into space for another mission sometime in October of this year.

As for the second space plane, its long mission has been termed a success, although no mission specifics have been released. It launched on March 5, 2011 from Cape Canaveral Air Force Station in Florida. Since then, the press release said, Vandenberg crews have conducted extensive, periodic training in preparation for landing.

“The men and women of Team Vandenberg are ready to execute safe landing operations anytime and at a moment’s notice,” said Col. Nina Armagno, 30th Space Wing commander. The space professionals from the 30th Space Wing will monitor the de-orbit and landing of the vehicle.

Seen here is the X-37B Orbital Test Vehicle, compared with proposed X-37C crewed vehicle, the space shuttle and the Atlas V booster that is currently used to launch the OTV. Image Credit: AIAA/Grantz/Boeing

The mini spaceplane is 8.8 meters (29 feet) long with a wing span of 4.2 meters (14 feet). It can weigh up to about 5,000 kg (11,000 pounds) fueled for launch. The reported in-space design life is 270 days, but sources say that good performance on this mission enabled ground controllers to keep it aloft significantly longer.

While no news of its orbital parameters have been released, skywatchers and amateur satellite trackers have been keeping an eye on where the OTV-2 has been. After launch it had a 331 km (206-mile)orbit inclined 42.8 degrees to the equator, but in the summer of 2011 the orbit was raised slightly to 337 km (209 miles).

Vandenberg said they would provide more details when available.

Source: Vandenberg AFB