Tag: engineering

European satellite operators are pressing Arianespace to find ways to immediately reduce the cost of launching satellites on now Ariane 5 and in the future on Ariane 6.

4:28 pm

European satellite operators are pressing Arianespace to find ways to immediately reduce the cost of launching satellites on now Ariane 5 and in the future on Ariane 6.

And why are they doing this? To quote them:

“What is sure is that Europe deserves and requires a [reorganized launcher sector] ahead of 2019, the letter says. “[C]onsiderable efforts to restore competitiveness in price of the existing European launcher need to be undertaken if Europe is [to] maintain its market situation.

“In the short term, a more favorable pricing policy for the small satellites currently being targeted by SpaceX seems indispensable to keeping the Ariane launch manifest strong and well-populated.” [emphasis mine]

It seems that they take very seriously the competitive challenge being presented by SpaceX.

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The backup computer that helps operate ISS’s robot arms is not responding to commands.

11:23 pm

The backup computer that helps operate ISS’s robot arms is not responding to commands.

The timing could not be worse.. Though the number one computer is functioning fine, this unit is essential for controlling the robot arm that will berth Dragon to ISS this week.

Side note: The article above described this problem in its headlines as a “glitch.” I despise this word, as it is generally used by government bureaucrats to minimize the seriousness of a failure. The Soviet era bureaucrats in Russia loved it. I have noticed it popping up in American news reports relating to space more and more, and it is never a very accurate description of the situation. This computer failure is not a “glitch,” it is a serious failure of an essential piece of hardware.

Update: Because a spacewalk will be required to fix the backup computer, NASA has okayed the launch of Dragon. They need it to arrive first because it carries a new spacesuit and other parts needed to replace the suit that almost drowned an astronaut during a spacewalk last summer.

Note: I was in the back country of Arizona this past weekend, caving, which is why I am only now getting up to speed on this weekend’s news.

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Houston yesterday signed a letter of intent with Sierra Nevada to provide the company a home at that city’s proposed spaceport.

9:15 am

The competition heats up: Houston yesterday signed a letter of intent with Sierra Nevada to provide the company a home at that city’s proposed spaceport.

The competition here is not from the spaceship company but from the spaceport. Houston is in a race with Colorado and Florida for the launch business. In fact, it appears that a lot of American cities are scrambling to attract the new aerospace launch companies, suggesting that they all see a new industry aborning and want their share.

Another example: The California legislature has passed a ten year tax exemption for spaceflight companies.

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An award winning science teacher was suspended when an unnamed school employee thought two student science projects looked too much like weapons.

3:33 pm

Idiocracy: An award winning science teacher was suspended when an unnamed school employee thought two student science projects looked too much like weapons.

Schiller got into trouble after two of his students turned in science projects designed to shoot little projectiles, reports the Los Angeles Times. One of the projects used compressed air (but was not actually connected to any air). The other one was coil gun: a tube surrounded by a coil and powered by a standard AA battery.

An unidentified school employee saw the air-pressure projectile device and got scared because, to her, it looked like a fearsome weapon. The amount of knowledge the employee has concerning science – if any – is unclear.

As a result of the unnamed employee’s fears, Schiller – who actually never got to see either the air-pressure project or the coil project except in photos – was dismissed from the classroom indefinitely. School officials impounded both projects as “evidence,” according to the mother of the kid who did the coil project.

Why am I reminded of this movie scene?
» Read more

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Congress and NASA administrator Charles Bolden battled over ISS, Russia, crew transport, and commercial space yesterday in a hearing before Congress.

8:20 am

Congress and NASA administrator Charles Bolden battled over ISS, Russia, crew transport, and commercial space yesterday in a hearing before Congress.

Not surprising. Congress wants to know what NASA will do if Russia pulls out of ISS and Bolden really has few options if they do. He in turn was trying to get Congress to focus on funding commercial space so that we can launch our own astronauts to ISS and not depend on the Russians. A true confederacy of dunces. More here.

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According to the deputy head of Russia’s space agency, they are not planning any retaliatory sanctions against NASA.

2:45 pm

According to the deputy head of Russia’s space agency, they are not planning any retaliatory sanctions against NASA.

Whew! That’s a relief.

Seriously, I never expected them to do anything, as the sanctions NASA has imposed, excluding ISS, are so minor that they mean nothing to Russia. The only people NASA really hopes will react to these sanctions are Congressmen and Senators when they realize how dependent we are on the Russians to get to space.

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Boeing is about to begin environmental tests on a new composite fuel tank for rockets.

12:52 pm

The competition heats up: Boeing is about to begin environmental tests on a new composite fuel tank for rockets.

Tanks made of composite materials have been a dream of space engineers for decades. Lockheed Martin tried to build them for the X-33, and their failure was essentially what killed that spacecraft. If Boeing is successful here and the composite tanks can then be put into a variety of launch rockets, the savings in weight will lower the cost of getting payloads to orbit significantly.

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As the NASA lunar probe LADEE nears its planned end — where it will crash onto the Moon — the scientists running it admit that they have as yet been unable to solve its primary scientific question about levitating lunar dust.

12:43 pm

As the NASA lunar probe LADEE nears its planned end — where it will crash onto the Moon — the scientists running it admit that they have as yet been unable to solve its primary scientific question about levitating lunar dust.

A major goal of the mission was to understand a bizarre glow on the Moon’s horizon, spotted by Apollo astronauts just before sunrise. “So far we haven’t come up with an explanation for that,” project scientist Rick Elphic, of NASA’s Ames Research Center in Moffett Field, California, said at a media briefing on 3 April. One leading idea is that the Sun’s ultraviolet rays cause lunar dust particles to become electrically charged. That dust then lofts upwards, forming a cloud that caught the light and the astronauts’ eyes.

LADEE carries an instrument that measures the impact of individual dust particles, as well as the collective signal from smaller particles. Lunar scientists had expected a certain amount of tiny dust to explain what the Apollo astronauts saw. But LADEE didn’t find it. “We did measure a signal that indicates that the amount of lofted dust has to be at least two orders of magnitude below the expectations that were based on the Apollo reports,” says Mihály Horányi, the instrument’s principal investigator, who is at the University of Colorado. Perhaps the dust lofting happens only occasionally, he suggests, and the astronauts were in just the right place at the right time to see it.

This remains an important question. Knowing what caused that horizon glow and knowing how often it occurs is essential knowledge for any future lunar base or research station.

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The launches at Kennedy, delayed because of a fire at an Air Force radar facility, have now been rescheduled.

12:33 pm

The launches at Kennedy, delayed because of a fire at an Air Force radar facility, have now been rescheduled.

This includes a military launch by an Atlas 5 rocket on April 10 and SpaceX’s next Falcon 9 launch to supply ISS. The Falcon 9 flight will also include an attempt to bring the first stage back to a soft vertical landing over water.

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Even as India successfully launched its second homemade GPS satellite today, its space agency ISRO announced that it will launch a test flight of a manned capsule in June using that country’s powerful GSLV rocket.

9:04 pm

The competition heats up: Even as India successfully launched its second homemade GPS satellite today, the head of of the Vikram Sarabhai Space Centre in India announced that it will launch a test flight of a manned capsule in June using that country’s powerful GSLV rocket.

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UrtheCast has released its first image of Earth, taken from one of its cameras on ISS.

9:50 pm

UrtheCast has released its first image of Earth, taken from one of its cameras on ISS.

The UrtheCast (pronounced Earth-Cast) system, which was installed (not without trouble) on the International Space Station at the end of 2013, is composed of two cameras. The Theia “medium resolution” camera took this shot; the full picture has a resolution of 3200×8000, or about 25 megapixels. The high-resolution device, which will capture video, is still being calibrated.

Eventually UrtheCast plans to provide free, constant, near-real-time video of the globe from far above — that is, when it’s not being rented out to parties interested in a quick satellite snap of an area. Powerful cameras able to respond quickly to such requests are in high demand by everyone from law enforcement to disaster-relief coordinators.

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Brian Binnie, the man who flew SpaceShipOne for Scaled Composites, has left that company for competitor XCOR

9:43 am

Brian Binnie, the man who flew SpaceShipOne for Scaled Composites, has left that company for competitor XCOR.

It might simply be the man got a promotion, but it also might be that he knows the problems SpaceShipTwo is having and sees his chances of flying there going down. His willingness to work for XCOR instead could also be looked at as a kind of endorsement of that company’s chances of success.

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Six Senators on Wednesday demanded the Air Force open up competition to more companies for launching its military satellites.

9:22 am

The competition heats up: Six senators on Wednesday demanded the Air Force open up competition to more companies for launching its military satellites.

U.S. senators on Wednesday urged the Air Force to allow more competition in the multibillion-dollar market for launching government satellites, citing rising costs and concerns about Russian-made engines that power some of the U.S. rockets.

Lawmakers said the Air Force’s budget plan for fiscal 2015 reduced opportunities for privately held Space Exploration Technologies (SpaceX) and others to gain a foothold in a program now dominated by the two biggest U.S. weapons makers, Lockheed Martin Corp and Boeing Co.

This demand also bodes badly in an indirect way for SLS. It indicates that these senators are beginning to notice the cost benefit of competition and of using the private market. Such a realization is going to eventually leak into their peanut brains about SLS, and that will not do that program any good, especially if the new commercial private companies like SpaceX continue to show success.

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In a vague announcement with unclear ramifications, a NASA memo today suspended “all contact with Russian government officials,” though it exempted all activities in connection with ISS.

12:38 pm

In a vague announcement with unclear ramifications, a NASA memo today suspended “all contact with Russian government officials,” though it exempted all activities in connection with ISS.

Given Russia’s ongoing violation of Ukraine¹s sovereignty and territorial integrity, until further notice, the U.S. Government has determined that all NASA contacts with Russian Government representatives are suspended, unless the activity has been specifically excepted. This suspension includes NASA travel to Russia and visits by Russian Government representatives to NASA facilities, bilateral meetings, email, and teleconferences or videoconferences. At the present time, only operational International Space Station activities have been excepted. In addition, multilateral meetings held outside of Russia that may include Russian participation are not precluded under the present guidance.

It appears they are suspending all NASA activities with Russia except ISS, which means that the most important and the bulk of the cooperative work will continue. However, it does mean that the Obama administration has decided to politicize NASA’s operations with Russia in a way that has not been done since the fall of the Soviet Union.

I will be doing a segment on John Batchelor tonight on this developing story.

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Scientists from the joint European/Russian ExoMars rover mission have narrowed their candidate landing sites to four.

9:43 am

Scientists from the joint European/Russian ExoMars rover mission have narrowed their candidate landing sites to four.

Last week, 60 scientists met at ESA’s European Space Astronomy Centre near Madrid to discuss eight potential sites. On 27 March, they cast an informal vote, and four sites emerged as favourites: Mawrth Vallis, Oxia Planum, Hypanis Vallis and Oxia Palus. An expert working group tasked with recommending a final landing site will now consider the proposals, before announcing a formal shortlist of three or four sites in June. Following detailed studies of the shortlisted sites, the panel will make a single recommendation to ESA and Roscosmos in late 2016.

This is maybe the most risky mission to Mars in decades, as the landing design is coming from the Russians, who have not had a successful interplanetary mission since the era of the Soviet Union, and even then had a 100% failure rate for their missions to Mars. (On a more optimistic note, the European Mars Express mission used a Russian rocket to take off, making it the first Mars mission with Russians participation that actually succeeded.)

One of the factors that has made this mission more risky is the fact that the U.S. was once a participant and backed out very late in the game. The Russians are our replacement, and have had to scramble to catch up.

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The German-built comet lander Philae has been successfully reactivated on Rosetta.

9:24 am

The German-built comet lander Philae has been successfully reactivated on Rosetta.

Philae will be ejected from the Rosetta mothership in November to latch itself onto the comet’s icy surface with harpoons and screws. The lander has its own suite of science instrumentation to take the first-ever photos and measurements from a comet’s surface. Engineers plan a four-week commissioning phase for Philae to check on its health and activate the lander’s 10 instruments.

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