Showing posts with label LEO. Show all posts
Showing posts with label LEO. Show all posts

Tuesday, June 19, 2012

China and the Moon

Shenzhou 9 lifts off for rendezvous and docking in space
Paul D. Spudis
The Once and Future Moon
Smithsonian Air & Space

With the weekend launch of the latest Shenzhou spacecraft and its successful rendezvous and docking with an orbiting space station, world attention is once again focused on China’s flourishing space program.  Although China’s human spaceflight efforts currently focus on low Earth orbit, in recent years they have sent two robotic orbital spacecraft to the Moon and have announced their intentions for a lunar lander/rover mission.  These efforts lead many in the west to speculate that a presence on the Moon is a likely and realistic goal for China’s space future.  In terms of the possible purpose for such lunar efforts, things are little more vague.  Most assume that China will go to the Moon for reasons similar to the geopolitical motives that impelled America to undertake the Apollo missions.  While some actually welcome China’s aspirations to conquer the Moon, other space observers smirk at their apparent willingness to (as they characterize it) “waste billions of dollars to repeat what America did thirty years ago.”  Others understand why China aims for the Moon.

The United States currently has no strategic space goal.  Many in the U.S. space community argue that the development of commercial launch services through federal subsidies is a goal.  To smooth the path for this approach, calls for consensus have been made by some New Space advocates.  Funding to support the research and development costs of these new commercial services would come by excising chunks of the rapidly dwindling NASA budget.   “Flat or declining” now describes the American civil space program budget and regularly reaching LEO to supply ISS has become our “new” vision.

In contrast, China is conducting an incremental, step-wise effort to gradually but inexorably extend their reach and influence in space, first into low Earth orbit and then into cislunar space and beyond.  Their approach uses a variety of hardware derived from existing systems while adding new capabilities over time.  China appears to be focused and following clear, long-range goals in space.  Because we do not look ahead on timescales of 20-30 years (accustomed instead to a 5-10 year timeframe), we have no long-range strategy to guide what we build or a plan for securing any long-term space goals.

Certainly wide-ranging concerns propel China’s push for human space access, some that can be envisioned now and some that cannot.  But fundamentally, they have accepted the proposition that freedom of space in the 21st century is equivalent to the principle of freedom of the seas that governed 19th and 20th century geopolitics.   In short, such a principle comprises the ability to project power and to protect national interests whenever and wherever China might be confronted within the strategic theater in question, in this case, the domain of cislunar space.

I have written before on the economic, strategic and scientific value of cislunar space, the zone in which virtually all of our space assets and satellites reside.  China intends to preserve her freedom of action by creating a spaceflight capability that can access and use any location of cislunar space, up to and including the lunar surface.  To build a sustainable space program using incremental, cumulative steps, it makes no sense to “leapfrog” over (or to ignore) the intermediate locations from which space faring capability and utility can be demonstrated, established and used.

Much of the published speculation on China’s interest in the Moon focuses on mining the Moon for the nuclear fusion fuel 3He or substances found on the lunar surface, such as titanium or rare earth elements.  In fact, one of the simplest substances found on the Moon has enormous value in space – water.  Water can be used to support human life, as a medium of energy storage, and as rocket propellant.  Water is the currency of spaceflight and one of the most valuable, usable substances we could obtain from any extraterrestrial object.

If I wanted to establish a secure foothold for my country in cislunar space, I would secure the territory near the poles of the Moon.  We know from the results of several recent probes that the lunar poles contain billions of tons of water, much of it chemically unbound as ice, a particularly easy form to harvest, concentrate and use. Material and energy resources, concentrated together in a compact location are assets of immense economic and strategic value.  Wars have been waged over less.

International treaty prohibits claims of extraterrestrial territory by national entities.  But treaties are “gentlemen’s agreements” and sometimes nations do not behave like gentlemen.  There is no mechanism to enforce the 1967 Outer Space Treaty except for a given country’s unwillingness to undergo international opprobrium.  Moreover, a country can withdraw from the treaty at will.  China tends to do what it wants to do, unless the economic or political price is perceived to be too high.  The potential of the Moon and cislunar space may outweigh their sense of geopolitical risk or concern about international ostracism.

What does this mean for the United States?  To listen to many in the space press, nothing.  A quick yawn and then back to propagandizing for more federal dollars to be passed on to new space companies.  But ultimately, it could mean that their libertarian dreams of a profit-making space frontier will never come to pass.  If free market capitalism and democratic political institutions are to have a future in the new frontier of space, entities, investors and consumers who share these values must secure a notable presence.  If the United States has a vigorous civil space program that creates a permanent presence there, such a system may have a chance to take root.  Conversely, our absence is almost a guarantee that our system and values will not be the guiding paradigm on the new frontier.

For many observers, an absent America (or with a mere supporting role) would be acceptable.  They believe America is what’s wrong with the world and that it’s high time that we step aside (in their opinion to one of subservience and irrelevance – certainly not one of power projection or as an economic engine and technology driver).  Parties (and countries) that lead make the rules.  While China has a great industrial base and a large, seemingly market-based economic system, it is actually a system of big government corporatism, where central planners decide which industries shall be allowed to grow and in what direction – capitalism, under total governmental control.

China is a rapidly advancing technically and is one of our largest trading partners, attributes beneficial in relationships between equals.  Historically, once a shift occurs in the status of partners, relationships change.  Because China’s influence in the world is growing, it is vital that we discuss and weigh these facts.  Our national economic and security interests cannot be jeopardized by a misguided rush to hand our space future over to companies who are in the imagining stage of what China just accomplished this weekend.

Originally published at his Smithsonian Air & Space blog The Once and Future Moon, Dr. Spudis is a senior staff scientist at the Lunar and Planetary Institute. The opinions expressed are those of the author and are better informed than average.

Wednesday, May 16, 2012

"The Flight of the Dragon"

The Falcon 9 launch vehicle [SpaceX/Chris Thompson].
Paul D. Spudis
The Once and Future Moon
Smithsonian Air & Space

If things go according to plan Tuesday, the world will witness SpaceX launch its first Dragon cargo supply mission to the International Space Station.  As this flight has been heralded as the dawn of a new age in spaceflight – a paradigm shift in the way the spaceflight is approached – it is appropriate to step back for some reflection and perspective on what this flight may or may not represent.  As noted by many, this particular cargo flight has a lot riding on it – with overarching concern for success (even if a bit unfair), created in part both by vociferous advocacy and excessive public pronouncements.

1.  A successful or unsuccessful result from this flight neither confirms nor negates the value and/or viability of commercial spaceflight.

This proposition should be obvious.  Launch to orbit is an inherently difficult and risky endeavor.  Even launch vehicles with long histories of reliable flight fail, sometimes with distressing frequency.  We tend to think that space access should be routine but that appearance is deceiving; spaceflight is never routine, simply because orbital flight is possible only on the very edge of our capability.  Think of it as carrying a heavy load of luggage while ice skating – you may know how to do it and you may even pull it off successfully a number of times, but if you start taking it for granted, a fall on the posterior is quite likely (with this eventuality more probable in the early stages of the endeavor).

Looked at in another way, a successful mission does not “prove” the case for commercial human spaceflight (the case for commercial unmanned space launch has long since been proven) nor does it negate its feasibility.  The real issue with commercial human spaceflight is the existence of a market.  Right now, such a market does not exist.  New Space advocates have unlimited faith that one will emerge, but hope is not a business plan.  It will take years of successful commercial launches (and safe returns) for the creation of a genuine commercial market.  The uncertainties in the future legal status of commercial human spaceflight is enough to give one pause – contemplate the likely consequences following the first fatal accident in a commercial human spaceflight, after the ambulance chasers get their teeth into the flesh of every company who ever had anything whatsoever to do with the flight.

2.  The creation of SpaceX capability is not “commercial” in the sense that we in the capitalist United States of America understand it.  Likewise, a government space program is not “socialism.”

The word commercial has been re-branded.  Previously, in most entrepreneurs’ way of thinking, “commercial” enterprise meant that a person or group drew up a business plan, raised private capital and shouldered the financial risk in an attempt to make a profit by providing a product or service.  The understanding of the term “commercial space” has been stretched to encompass a business plan where a start-up company requests (and expects) government subsidies on their promise of future delivery of a product and/or service.  Because it’s not “run” by the government, this form of government-sponsored crony capitalism is now deemed “commercial.”   Financial tweaking is not how most would understand or define a new paradigm in space travel.

Typically during the last 50 years of our federal civil space program, we were working toward some clearly articulated, reachable (that adjective is important) goal on some kind of timetable.  Because spaceflight, particularly the manned variety, was considered to be dangerous and technically cutting edge, the program was more of an engineering research program than the deployment of an operational transportation system.  Such R&D has important national security and economic ramifications and as such, fits perfectly under the constitutional requirement for the federal government to provide for the common defense and promote economic development.  If that’s “socialism,” then America has been a socialist country from its founding.

3. True commercial space firms exist, but they are pursing their goals quietly and generally without excessive hype.  They do not rely on government money to support their R&D costs.

Burt Rutan developed Space Ship One for Paul Allen in order to win the Ansari X-Prize (and did) and is currently developing a new spacecraft for Richard Branson’s Virgin Galactic suborbital spacelineRobert Bigelow’s company took a discarded NASA design for inflatable spacecraft and is developing a future commercial space station, available for sale of lease (it’s the transportation problem to and from his station that’s holding him back.)  None of these efforts are taking the King’s shilling – they are developing hardware and capability themselves.  It’s interesting that unlike some New Space firms, they tend to make fewer public pronouncements and the ones they do make are both substantive and realistic (you tend to operate that way when you’re risking your own nickel).

4.  The process of contracting with “commercial” firms to carry payloads into orbit is not a space policy.

This last item is obvious, but only if you’re not getting your news exclusively from the space media.  Even if SpaceX is completely successful, all we will have done is to add another player to the existing roster of supply vehicles that enable the occupation and use of the ISS.  Since discarding the Vision for Space Exploration over two years ago, we have no long-term goal or strategic direction for our civil space program.  The pre-existing Commercial Crew and Cargo Program has been billed as a “new direction” but it is simply a utilitarian effort to keep an existing program going, not a new path or direction to follow.  Mirages of human missions to asteroids and following a “flexible path” will produce pointless viewgraph engineering – and no missions getting off the ground.  At least with the VSE, the nation knew where, when and why we were going.

Even as we hope for a successful SpaceX launch and return, it is vital that America recognize that our government has no space policy or strategic direction – commercial or otherwise.  From both a security and an economic perspective, this is a dangerous situation for our nation.

Originally published at his Smithsonian Air & Space blog The Once and Future Moon, Dr. Spudis is a senior staff scientist at the Lunar and Planetary Institute. The opinions expressed are those of the author and are better informed than average.

Friday, May 11, 2012

SpaceX joins Bigelow in marketing LEO stations

Exterior camera view of the unmanned inflatable Bigelow Genesis orbital station, in low Earth orbit April 27, 2009 [Bigelow Aerospace].
Hawthorne, California and Las Vegas, Nevada – SpaceX and Bigelow Aerospace have agreed to conduct a joint marketing effort focused on international customers. The two companies will offer rides on SpaceX’s Dragon orbiter, using the Falcon launch vehicle, carrying passengers to Bigelow habitats in low Earth orbit.

Bigelow president and founder Robert T. Bigelow said, “We’re very excited to be working with our colleagues at SpaceX to present the unique services that our two companies can offer to international clientele. We’re eager to join them overseas to discuss the substantial benefits that BA 330 leasing can offer in combination with SpaceX transportation capabilities”.

The BA 330 is a habitat that will provide roughly 330 cubic meters of usable volume and can support a crew of up to six. Bigelow Aerospace plans to connect two or more BA 330s in orbit to provide national space agencies, companies, and universities with unparalleled access to the microgravity environment.

NASA signed off on the 7 passenger Dragon seating layout, May 8
[NASA].
“SpaceX and BA have a lot in common. Both companies were founded to help create a new era in space enterprise,” said SpaceX President Gwynne Shotwell. “Together we will provide unique opportunities to entities -- whether nations or corporations -- wishing to have crewed access to the space environment for extended periods. I’m looking forward to working with Bigelow Aerospace and engaging with international customers,” Shotwell explained.

SpaceX’s Dragon spacecraft will be capable of carrying seven passengers to orbit. With the company’s Falcon family of rockets, SpaceX is working to create the world’s safest human spaceflight system.

The companies will kick off their marketing effort in Asia. Representatives from Bigelow and SpaceX will meet with officials in Japan shortly after the next launch of the Falcon 9 and Dragon spacecraft.

Friday, September 23, 2011

ISS: Earth's Moon


Photographed by the Expedition 28 crew aboard the International Space Station, this image shows the moon, the Earth's only natural satellite, at center with the limb of Earth near the bottom transitioning into the orange-colored troposphere, the lowest and most dense portion of the Earth's atmosphere. The troposphere ends abruptly at the tropopause, which appears in the image as the sharp boundary between the orange- and blue-colored atmosphere [NASA/ISS].


Thursday, July 21, 2011

U.S. Space Shuttle program ends


An unprecedented view of the space shuttle Atlantis and the ionization of its re-entry into Earth's atmosphere, "appearing like a bean sprout against clouds and city lights," on its way home, July 21, 2011. Photographed by Expedition 28 from the ISS. Pre-dawn airglow over Earth can be seen in the background [NASA].


0957 UT, 21 July 2011: Atlantis returns to Earth for the final time, bringing an end to the program after more than thirty years, after 200 orbits and 8.5 million km. It was the 25th night landing and 78th landing at KSC, only the 133rd landing since 1981. MET: 12 days, 18 hours, 28 minutes and 50 seconds. Since April 12, 1981, 355 individuals from 16 countries flew 852 times aboard the shuttle, deploying 180 payloads, including satellites, returned 52 payloads from space and retrieved, repaired or redeployed seven spacecraft. STS-135 was the 33rd and final flight for Atlantis after totaling 307 days in space, 4,848 orbits and 872.3 million kilometers (roughly 48.49 light minutes or 5.8 AU) [NASA].

Sunday, February 21, 2010

The long shadow of the Space Shuttle

Endeavour briefly casts a moving shade over the now-virtually completed International Space Station after undocking Friday evening (UT), February 19, 2010 as both huge vehicles orbited 334.7 km above the Atlantic, west of North Africa. "Shuttle pilot Terry Virts performed a fly-around of the station, enabling his crewmates to conduct a photo survey of the complex." The long shadow over the huge ISS solar arrays seem to symbolizes both the long end and the nearly as long beginning of two historic moments of "The Space Age." After more than a decade of assembly the Shuttle finally has a true destination in low Earth orbit, as the thirty-year-old manned reusable heavy-lift vehicle program draws to an end. In the long run, perhaps the most notable accomplishment for the Shuttle, the United States and for all of "humankind" will have been having proved large-scale construction off-Earth is possible, a sheer existential fact that everywhere humans live on Earth, in every state of civilization, they can see (now often even in daylight) in the sky overhead. The first Space Age, then, may now be said to have arrived at its end. How our humans will learn to survive beyond low Earth orbit is the next real challenge.

Sunday, January 24, 2010

White House wants outsource of NASA work

Andy Pasztor
Wall Street Journal

The White House has decided to begin funding private companies to carry NASA astronauts into space, but the proposal faces major political and budget hurdles, according to people familiar with the matter.

The controversial proposal, expected to be included in the Obama administration's next budget, would open a new chapter in the U.S. space program. The goal is to set up a multiyear, multi-billion-dollar initiative allowing private firms, including some start-ups, to compete to build and operate spacecraft capable of ferrying U.S. astronauts into orbit—and eventually deeper into the solar system.

Read the full story HERE.

Monday, December 7, 2009

April unmanned orbital test for X-37B

The Air Force hopes its unmanned X37B (in taxi tests in 2007) will take on some of the functions of the shuttle

Air & Space - It's been a long wait—in some ways, more than 50 years—but in April 2010, the U.S. Air Force is scheduled to launch an Atlas V booster from Cape Canaveral, Florida, carrying the newest U.S. spacecraft, the unmanned X-37, to orbit. The X-37 embodies the Air Force's desire for an operational spaceplane, a wish that dates to the 1950s, the era of the rocket-powered X-15 and X-20. In other ways, though, the X-37 will be picking up where another U.S. spaceplane, NASA's space shuttle, leaves off.

With a wingspan of 15 feet and a length of 27.5 feet, the X-37 looks like a tiny space shuttle. It has a blunt (though windowless) nose, and one rocket engine bell instead of the shuttle's three. Two cargo doors open just as the shuttle's do, revealing a four- by seven-foot bay. Like the shuttle, the X-37 was designed for low Earth orbits—in the latter's case, altitudes of 125 to 575 miles. And the craft will fly like a shuttle, reentering the atmosphere with the orbiter's 40-degree nose-high attitude. After reentry, it will change to a 20-degree nose-down glide and, flying at up to 220 mph, land at Vandenberg Air Force Base in California, with Edwards Air Force Base as an alternate.

But as for the period between launch and landing, no one, save for a select few in the Department of Defense, knows exactly what the little Boeing-built spaceplane will do, or for how long. The Air Force Rapid Capabilities Office, which is running the program, says only that the orbital test version, the X-37B, will take a suite of next-generation technologies to orbit and will break new ground in the realm of launch, recovery, and reuse, all with an unmanned twist that the shuttle never offered.

At a 2008 Space Foundation breakfast in Washington, D.C., Gary Payton, deputy under secretary of the Air Force for space programs, recalled the X-37's origins. Payton started the program while at NASA. "Then, the X-37 was intended to be a testbed for new technologies that could retrofit into the shuttle: predominantly guidance, navigation, and control, and [thermal protection system] technologies," he said. In that era, planners imagined the shuttle carrying the X-37 to space in its cargo bay and releasing it.

Now, with the shuttle's retirement looming, it appears the X-37 will have an independent, post-shuttle life. Payton envisioned such a role for the X-37, saying: "It would be really advantageous in my mind if we had a system you could launch, recover, change out the payload bay quickly, and put into a different orbit, and do all that measured in weeks instead of decades." David Hamilton, director of the Rapid Capabilities Office, says in an e-mail: "Eventually, I see the unique possibility to operate X-37B more like an aircraft and explore the needs of responsive, reusable spacecraft." Unlike a satellite, he points out, the spaceplane returns, enabling "detailed inspection and significantly better learning than can be achieved with [a satellite's] remote telemetry alone. Experiments can be modified and reflown, with the objective of shortening the technology maturation timeline."

"The space shuttle was designed to be a very heavy payload lifter, and it has performed that job extremely well," says Mark Lewis, a University of Maryland hypersonics expert who recently completed a four-year appointment as chief scientist for the Air Force. "But you don't need to send a Mack truck into space when a Toyota Celica will do."

The question is: Will do what? Lewis, whose enthusiastic speech barely keeps pace with his mind, is happy to talk about the skin-deep similarities between the shuttle and the X-37. ("A lot of the basic reentry physics is treated the same way," he says. "Blunt configurations. The shuttle has very blunt leading edges.") But when he's asked about anything more than the X-37's aerodynamics, he clams up.

So does everyone else. "While some aspects of the…program have been designated as unclassified and been released to the public; information regarding specific technical and performance capabilities will not be released at this time," writes David Hamilton. "Hide it in plain view," says one observer of the Air Force's practice of letting out just a little about the X-37, enough to make it seem like it will never be more than a research tool.

Hamilton does say that "once declared operational, the X-37B could have applications to support missions such as space situational awareness; intelligence, surveillance, and reconnaissance; on-orbit servicing and repair; and satellite deployment and/or retrieval."

It's possible the spaceplane could have a role in national security, particularly since China, India, Japan, and even Iran have begun to exploit space. In December 2007, photographs of an unmanned, classified Chinese spaceplane, the Shenlong, or "Divine Dragon," began to appear on Chinese Web sites. Though hitched to the underside of a bomber, rather than perched atop an expendable booster, the mysterious Shenlong has a blunt nose and single rocket engine bell, making its appearance strikingly similar to the X-37's.

The U.S. program started out relatively open to view, a research effort jointly shaped by the Air Force, NASA, the Defense Advanced Research Projects Agency, and Boeing. The Air Force ordered the first prototype, the X-40A, from Boeing in 1996. When it came time to produce the next iteration, the X-37A drop-test vehicle, NASA had the company increase the size by about 20 percent.

But since then, the X-37 has taken a winding and perplexing path among NASA, DARPA, and the Air Force. From 2004 to 2006, DARPA oversaw it. Along the way, both the X-40A and the X-37A have been drop-tested (first over New Mexico in 1998 and California in 2006, respectively), which proved their automated approach and landing abilities. Finally the program was taken over by the Air Force. Today, call up any of these organizations and say "X-37" and it's like spraying a garden hose at housecats.

Monday, November 9, 2009

Selling Dragon as 60% cost saver



Doug Messier
ParabolicArc.com

The Examiner has a Q&A with SpaceX founder Elon Musk in which he talks about how much cheaper it will be once his company’s Falcon 9 rocket begins launching Dragon spacecraft into orbit:

SA: A manned flight to the ISS aboard a Soyuz currently costs about 50 million dollars. Where do you see this price in a few years when the Falcon 9 comes online and what are the benefits to US taxpayers?

EM: In contrast to the existing manned systems, a seat on-board the Dragon Spacecraft launched by the Falcon 9 rocket and would cost less than $20M per seat and it is 100% manufactured and launched in the United States. We are estimating that it would create well in excess of a 1000 high quality jobs at Cape Canaveral and an equivalent number in California and Texas, where we do our manufacturing and testing. Moreover, the total cost would only be $1.5 billion, so taxpayers would save $2 billion.

Read more HERE.

Friday, October 16, 2009

China hints at station, lunar planning

Frank Morring, Jr. & Bradley Perrett
Aviation Week

Daejeon - China is laying the groundwork to land astronauts on the moon, which would follow an ambitious lunar robotic precursor program that also could pave the way for the country's first unmanned probe to Mars.

Dong Nengli of the China Manned Space Engineering Program says his organization - which developed the Shenzhou human spacecraft and is planning an unpiloted orbital rendezvous and docking experiment in 2011 - is already looking beyond the planned deployment of a 60-ton Chinese space station in 2020.

"During the course of the third step of the China manned spaceflight program, we will conduct a manned lunar mission conception study, validate the key technologies and finally pave the way for manned lunar exploration," Dong said at the International Astronautical Congress (IAC) here Oct. 15.

Chinese officials stress that there has been no government approval for a manned lunar landing, and say China would "welcome" a chance to join the larger international exploration effort that has coalesced around the International Space Station.

Dong and other officials at the congress offered no details about the human-lunar concept study, instead elaborating on plans to continue gaining spaceflight experience by building toward the 60-ton, three-person space station, and to follow up the second Chang'e lunar orbiter set for launch next year with a robotic lander, rover and eventually a sample-return mission.

The first miniature space station - Tiangong 1 - is under construction and still scheduled to go into orbit in 2011 to serve as a docking target for the Shenzhou 8, which will be unmanned.

Read the article, HERE.

Commercial Spaceflight: All Systems Go

The following is by astronauts Buzz Aldrin, Ken Bowersox, Jake Garn, Robert Gibson, Hank Hartsfield, John Herrington, Byron Lichtenberg, John Lounge, Rick Searfoss, Norman Thagard, Kathryn Thornton, Jim Voss and Charles Walker:

"We enthusiastically endorse this robust vision for the future of human spaceflight—a vision in which NASA is free to concentrate on the challenges of exploration beyond low Earth orbit while private commerce enables increased activity in Earth orbit. We strongly agree with the Augustine Committee's endorsement of commercial human spaceflight, and we encourage the White House and Congress to embrace this positive vision for our nation's future in space."

Read the Op-Ed from the WSJ, HERE.

Open Letter to NASA Administrator Charles Bolden from Robert Bigelow

"When the commercial crew transportation debate is artificially limited to only the two current participants of NASA's Commercial Orbital Transportation Services program, and the Atlas 5 is ignored, as it was during the congressional hearing in the House several weeks ago, this leads to a flawed discussion and problematic conclusions. We don't know if the House authorizers avoided talking about the Atlas due to bias, ignorance or a combination of both..."

"As you are well aware, future U.S. access to space will soon be entirely dependent on Russia. The Russians are excellent capitalists, and you should expect prices to rise above the already stunning $51 million per seat that NASA is currently paying during every subsequent Soyuz contract negotiation. A robust commercial crew program represents this nation's only hope of reversing this deplorable situation and reviving America's human spaceflight capabilities. If you choose this path, it will free NASA both in terms of substance and financing to look beyond LEO, leaving the agency to again become a trailblazer to the stars."

Full Text at SpaceRef.com

Monday, September 14, 2009

ESA's Debie-2 delivers orbital debris data

Debie-2 (DEBris In Orbit Evaluator – 2) and it's perch on the European Technology Exposure Facility (EuTEF)

Speeding along in orbit at more than seven kilometers per second, the International Space Station has its surfaces carefully shielded against potentially catastrophic collisions with micrometeoroids or man-made debris. Except that is for a trio of unprotected panels until recently attached to external payload platform of ESA’s Columbus module, specifically intended to sustain impacts from tiny specks of space dust.

Each pointing in a different direction – forward in the direction of orbit, upwards and sideways out to space - the three 10 by 10 cm aluminum foil panels formed the sensor units of an instrument called the DEBris In-orbit Evaluator-2 (DEBIE-2), returning telemetry on impact events to a separate data processing unit.

These units were sited on the European Technology Exposure Facility (EuTEF) which was mounted on the Columbus exterior until returned to Earth on the Space Shuttle this week. Columbus is an ideal position for impact monitoring since the module forms part of the leading edge of the International Space Station (ISS).

There are around 13 000 cataloged pieces of orbital debris larger than 10 cm across. These are big enough to be tracked by terrestrial radar so the ISS, the Shuttle and other satellites can manoeuvre out of their path. In addition there are many millions more items too small to be monitored from the ground. Traditionally most of what is known about these orbital populations has come from simply examining space hardware returned to Earth and counting the number and size of impact craters they have sustained while in orbit.

However the DEBIE system actively measures impact energies and velocities as strikes occur. Possessing only a limited detection area – three times 100 cm2 – the instrument is designed around impacts from particles around a micrometre (a thousandth of a millimeter) in size, the type of debris about which least is known.

Around the same size as smoke particles, they may be tiny but their effect is still dramatic: impacting at hypersonic velocities, they briefly heat the aluminum foil locally to thousands of degrees Kelvin, hotter than the surface of the Sun.

Rread the ESA review HERE.

Thursday, August 20, 2009

South Korea cancels satellite launch

The Korean Aerospace Research Institute's KSLV-1, on its launching pad after the scheduled launch was suspended on Wednesday. (Getty Images)

Mark McDonald
New York Times

South Korea canceled the first satellite launching from its own territory on Wednesday only seven minutes before the planned liftoff, attributing the decision to a technical problem.

The terminated mission seemed to avert, for the moment, a new flare-up of tensions with North Korea, which has been condemned internationally for launching its own rockets and has said the United Nations should apply the same punitive standards to the South. South Korea’s aerospace officials told reporters at the Naro Space Center that they had canceled the launching because of a glitch in the in the automatic launching sequence, perhaps as a result of a faulty high-pressure tank. It was unclear why the problem was discovered with only a few minutes before the final countdown.

Read the article HERE.

Tuesday, August 18, 2009

Excalibur-Almaz, Ltd.

The reusable re-entry vehicle that was previously part of a Soviet manned-military surveillance space station, the Almaz component, will now be integrated into a private space station run by the Russian-American company Excalabur-Almaz, Ltd. They have announced they will carry paying research crews on one week missions into low Earth orbit by 2013. (NPROM)

Excalibur Almaz to launch private space station by 2013

Doug Messier
ParabolicArc.com

EA Founder and CEO Art Dula said, “Through cooperation with NPOM and with the support of leading space contractors around the world and an exceptionally strong management and advisory team, EA is in a unique position to initiate a new era of private orbital space exploration.”

Cosmonaut Vladimir Titov, advisor to EA in Russia, said, “With this announcement, the dream of private orbital space exploration may become a reality in the very near future.”

Read the Posting HERE.

Saturday, August 1, 2009

South Korea plans launch of KSLV-1, August 11

President Lee Myung-Bak poses in front of the
KSLV-1 rocket (AFP)


As reported last October, when South Korea showed off what was purported to be a mock-up of the KSLV-1 booster, it's now official.

South Korea has rescheduled its first space rocket launch from its soil to August 11 after repeatedly postponing it due to technical reasons, officials said Saturday.

The Ministry of Education, Science and Technology said South Korea and Russia, a co-builder of the rocket, set the new launch date after talks.

"Both sides have set August 11 for blast-off," Kim Hong-Gab, a spokesman for the Korea Aerospace Research Institute affiliated with the ministry, told AFP.

He added weather conditions on the day would be "a decisive factor" to determine if the launch would go ahead as scheduled.

The previously-scheduled launch for around July 30 was postponed -- for a third time -- as Russians who had built the first stage of the Korea Space Launch Vehicle-1 called for more time for testing.

Blast-off had already been delayed from late 2008 to late June this year after China's Sichuan earthquake last year caused problems securing key parts.

South Korea plans to put a satellite weighing 100 kilograms (220 pounds) into a low earth orbit with the planned launch from the newly-built Naro Space Centre in Goheung, 475 kilometres (300 miles) south of Seoul.

South Korea is eager to join Asia's space race. In November 2007 it announced a plan to launch a lunar orbiter by 2020 and send a probe to the moon five years after that.

It unveiled the project one month after China launched its first lunar orbiter and two months after Japan.

In April last year Seoul sent its first astronaut into space aboard a Russian Soyuz rocket.

Friday, April 24, 2009

Genesis II Completes 10,000 Orbits

Bigelow Aerospace GENESIS II after 22 months in orbit

Genesis II, the second prototype expandable space habitat launched by Bigelow Aerospace on June 28, 2007, has completed its 10,000th orbit around the Earth. Following the first spacecraft Genesis I, this unmanned vehicle demonstrates the continued development of future space stations technologies.

Orbiting 665 days and having traveled close to 270 million miles, Genesis II has been busy transmitting pressure, temperature and radiation data to the mission operations staff in Las Vegas. We are also conducting long term testing of systems such as lighting, air circulation, and pressure monitoring systems. In addition, the expanded camera configuration has provided over 51,000 images consisting of the inside of the spacecraft, the external micro-meteoroid shielding, and the Earth. New images are downloaded weekly and can be seen HERE.

Genesis II was inserted into the same orbit as Genesis I. However, due to natural orbital decay, Genesis II is currently at a slightly higher altitude. Based on lifetime estimates, Genesis II and Genesis I will be in orbit for many more years. Check out the tracking page to find out when the satellite will be passing over your part of the world.

Sunday, April 5, 2009

Kwangmyŏngsŏng Kuplunt!

DPRK self-reliance has apparently triumphed in North Korea, now firmly among the ranks of deep water-faring nations.

Nothing to see here. (Kwangmyŏngsŏng was, after all, a heroic effort to explore Korean territory a kilometer underwater.)

Earlier reports from Xuinhua, The Korea Times and the BBC confirming Kwangmyŏngsŏng was "in orbit" resulted from imperialist propaganda. The stooges responsible have have been dismissed and their payroll taxes have been taxed retroactively.

Tuesday, March 3, 2009

PRC "aggressively" developing space station

Confirming an earlier report from Xinhua, Craig Covault over at Spaceflight Now is reporting that far from maintaining cautious and methodical space exploration, Beijing is preparing to launch a 17,000 lb low orbiting manned "military" space station. Launch is expected, Craig reports, in late 2010, to coincide with the retirement of the Space Shuttle.

Read Craig's story HERE.

Sunday, March 1, 2009

China plans to construct space station

Report from Beijing says CNSA will set core module in Low Earth Orbit in 2010.
Read report HERE.