Tag: engineering

North Korea fires another ballistic missile

6:11 pm

North Korea today conducted its ninth ballistic missile test this year, all of which have been in violation of UN sanctions.

The missile, presumed to be a Scud type, was launched eastward from the vicinity of Wonsan, Gangwon Province, at around 5:39 a.m., according to the Joint Chiefs of Staff (JCS). “The flight distance is around 450 kilometers,” it said.

As a Scud, the missile would likely not have the capability of carrying a heavy payload, like a nuclear bomb. Nonetheless, with each test North Korea gains knowledge on how to do exactly that.

For a detailed look at the people building North Korea’s missile program see this article from yesterday: Kim’s rocket stars – The trio behind North Korea’s missile program

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Brewing beer on the Moon

10:41 am

Capitalism in space: A student experiment to attempt to brew beer on the Moon, rejected by one Google Lunar X-Prize contestant, has been accepted by another.

The experiment involves a small canister that, once on the moon, will mix yeast with wort, the mixture of barley and other ingredients that give beer its flavor, to cause fermentation and carbonation. Besides proving that beer can be brewed remotely and in low gravity, the experiment demonstrates the potential for making other things involving yeast in low gravity, such as bread and certain medicines, which could be important if a lunar colony is ever established.

The canister, designed by the students at the Qualcomm Institute Prototyping Facility, will be aboard a spacecraft being built by Synergy Moon, one of the teams competing for the Google Lunar XPrize, a contest meant to inspire engineers and entrepreneurs to develop low-cost methods of robotic space exploration..

They have also been accepted to fly the experiment on several Synergy Moon orbital flights.

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LRO hit by meteoriod in 2014

5:35 pm

LRO as it was hit by a meteor

While taking an image in October 2014, Lunar Reconnaissance Orbiter had apparently been hit by some small object, causing it to vibrate and create the zig-zag distortions seen on the image, a cropped section of which is shown on the right.

Clearly there was a brief violent movement of the left NAC [Narrow Angle Camera]. The only logical explanation is that the NAC was hit by a meteoroid! How big was the meteoroid, and where did it hit? The physical properties and vibration modes of the NAC are very well known – during development a detailed computer model was made to ensure the NAC would not fail during the vibrations caused by the launch, which are severe. The computer model was tested before launch by attaching the NAC to a vibration table that simulates launch. The model was solid, both NACs survived the test, and launch.

Most of each NAC is sequestered inside the spacecraft structure, so only the leading edge of the baffle and the radiator are exposed to space, and thus are potential targets for impactors. From the detailed computer model, the LROC team ran simulations to see if we could reproduce the distortions seen the image. Assuming an impact velocity of 7 kilometers per second and a density 2.7 g/cm3, an impacting particle would have been 0.8 mm in diameter (~half the size of a pinhead). If the velocity was faster, then the particle would have been smaller, and if slower then larger.

For comparison, the muzzle velocity of a bullet fired from a rifle is typically 0.5 to 1.0 kilometers per second. So the meteoroid was traveling much faster than a speeding bullet. In this case LROC did not dodge a speeding bullet, but rather survived a speeding bullet!

The image is fascinating because you can see the vibrations slowly disappear as the zig-zags shrink and fade.

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NASA delays launch of space-junk removal test satellite

5:06 pm

In order to do additional safety reviews NASA has ordered a six-month delay, at the minimum, in the launch of test space junk removal satellite.

“Nothing of this size has ever been launched from the ISS before,” said Jason Forshaw, RemoveDebris project manager at the University of Surrey’s Surrey Space Centre, which leads the consortium [that built the satellite]. “Most of the things they are launching from there are cubesats, much smaller objects, 10 [kilograms] or so,” Forshaw said. “As you can imagine, we are progressing through the safety reviews and we are just going through those at the moment.”

The article also includes some discussion of the legal limitations of salvage in space, once again due to the limits in the Outer Space Treaty.

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Looking at Jupiter’s southern hemisphere

9:43 am

Jupiter's southern hemisphere

Cool image time! The image on the right, reduced to post here, shows Jupiter’s south pole and much of its southern hemisphere. It was taken during Juno’s last orbital fly-by of the gas giant’s cloud tops last week, and has been enhanced by Fevig-58, an ordinary citizen who downloaded the raw image and then uploaded his enhanced version to the Juno website.

It is definitely worthwhile taking a close look at the full resolution image. At the top its shows the horizontally banded Jupiter at equatorial- and mid-latitudes that has been that planet’s familiar face for centuries. In the middle is the transitional region from those horizontal bands to the chaotic polar regions. And at the bottom is the pole, where there the storms appear to follow no pattern and form a mish-mash.

One thing about Jupiter’s pole. It appears very different than Saturn’s. While I am certain they will find a vortex of some kind there, so far there is no indication of a coherent jet stream, as seen by Saturn’s hexagon. This once again demonstrates the one unbroken rule of planetary science that has been found with every planetary mission to every planetary body, whether they be pebbles, asteroids, dwarf planets, gas giants, or moons: Every single one of them is different and unique. They might fall into a single category, say gas giants, but each has its own unique features that make it different from every other member of that category.

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Egypt considers creating space agency

9:12 am

The Egyptian government is considering creating an Egyptian Space Agency.

The Egyptian government believes that the establishment of a space agency is necessary to invigorate and administer space programmes in Egypt, that in turn – it is hoped – will revitalize Egypt’s economy and entrepreneurship. While this approach is not without merit, it has been the cause of significant political controversy in Egypt as many of its citizens have voiced harsh criticism of the country’s space plans as the economy continues to deteriorate.

The proposed space agency will also administer Egyptian ambitions to build and even launch its own satellites.

Essentially, the government needs certain space capabilities (military and communications satellites), and a space agency would serve as its corporate arm for obtaining and managing those capabilities. It would also serve as a place where lots of foreign aid cash could be deposited into the government to be distributed to various friends. Along the way it might also help the economy and help shift Egypt in a more western and commercial direction.

How successful this becomes will depend on whether the Egyptian government lets the crony component dominate the process.

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First science results from Juno

11:48 am

The Juno science team today released their first research results since the spacecraft entered orbit around Jupiter in July 2016.

“Although many of the observations have terrestrial analogs, it appears that different processes are at work creating the auroras,” said SwRI’s Dr. Phil Valek, JADE instrument lead. “With JADE we’ve observed plasmas upwelling from the upper atmosphere to help populate Jupiter’s magnetosphere. However, the energetic particles associated with Jovian auroras are very different from those that power the most intense auroral emissions at Earth.”

Also surprising, Jupiter’s signature bands disappear near its poles. JunoCam images show a chaotic scene of swirling storms up to the size of Mars towering above a bluish backdrop. Since the first observations of these belts and zones many decades ago, scientists have wondered how far beneath the gas giant’s swirling façade these features persist. Juno’s microwave sounding instrument reveals that topical weather phenomena extend deep below the cloudtops, to pressures of 100 bars, 100 times Earth’s air pressure at sea level.

“However, there’s a north-south asymmetry. The depths of the bands are distributed unequally,” Bolton said. “We’ve observed a narrow ammonia-rich plume at the equator. It resembles a deeper, wider version of the air currents that rise from Earth’s equator and generate the trade winds.”

Juno is mapping Jupiter’s gravitational and magnetic fields to better understand the planet’s interior structure and measure the mass of the core. Scientists think a dynamo — a rotating, convecting, electrically conducting fluid in a planet’s outer core — is the mechanism for generating the planetary magnetic fields. “Juno’s gravity field measurements differ significantly from what we expected, which has implications for the distribution of heavy elements in the interior, including the existence and mass of Jupiter’s core,” Bolton said. The magnitude of the observed magnetic field was 7.766 Gauss, significantly stronger than expected. But the real surprise was the dramatic spatial variation in the field, which was significantly higher than expected in some locations, and markedly lower in others. “We characterized the field to estimate the depth of the dynamo region, suggesting that it may occur in a molecular hydrogen layer above the pressure-induced transition to the metallic state.”

What I want to see is a depth map showing where Jupiter’s atmosphere ends and its solid core begins. I expect Juno will eventually be able to give us a first glimpse.

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Russia completes first military launch in a year

8:51 am

Russia today successfully launched a military payload on a Soyuz rocket, ending a year long gap in such launches due to the discovery of faulty and corrupt practices at rocket engine manufacturing facilities.

The lull in activity has in part been down to manufacturing defects and quality control issues affecting Russia’s production of rocket engines. A contractor was found to have been using cheaper materials in place of precious metals in alloys used to make parts of the engines. Seventy-one Proton engines and a number of Soyuz engines were recalled for inspection and repair.

Reliability concerns have lingered around Russia’s launch fleet in recent years, with Proton failing ten times since 2007 and Soyuz experiencing seven failures in the last eight years. Two Rokots and a Zenit have also failed in the last decade, while Russia’s flagship Fobos-Grunt mission to Mars never left low Earth orbit after the spacecraft itself malfunctioned.

In 2016, Russia experienced just one launch failure – with a Soyuz-U rocket suffering a third stage failure during December’s attempted launch of the Progress MS-04 vehicle to resupply the International Space Station. Despite this, there were two near-misses: a Soyuz-2-1b underperformed during the launch of a GLONASS navigation satellite last May, and the Proton launch in June suffered a second stage engine failure. In both cases the rockets’ upper stages – Fregat-M and Briz-M respectively – were able to alter their flight plans and inject the satellites into their planned orbits despite the anomalies.

They hope to resume Proton flights next month. Either way, it looks likely that in 2017 Russia will launch the fewest rockets in decades.

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Rocket Lab launches its first Electron rocket

8:34 am

Capitalism in space: Rocket Lab today successfully completed the first test flight of their Electron rocket.

The rocket did not reach orbit, though it did reach space altitude. More details here.

“It has been an incredible day and I’m immensely proud of our talented team,” said Peter Beck, CEO and founder of Rocket Lab. “We’re one of a few companies to ever develop a rocket from scratch and we did it in under four years. We’ve worked tirelessly to get to this point. We’ve developed everything in house, built the world’s first private orbital launch range, and we’ve done it with a small team.

“It was a great flight. We had a great first stage burn, stage separation, second stage ignition and fairing separation. We didn’t quite reach orbit and we’ll be investigating why, however reaching space in our first test puts us in an incredibly strong position to accelerate the commercial phase of our program, deliver our customers to orbit and make space open for business,” says Beck.

It appears they had a problem with the upper stage. Nonetheless, this is a great achievement. They were completely privately funded. They built their own launchpad. When they make orbit they will be the first company to have done such a thing.

I have embedded footage of the launch below the fold.
» Read more

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Boeing wins DARPA contract to build reusable first stage spaceplane

10:04 pm

Capitalism in space: DARPA has selected Boeing to build its XS-1 spaceplane concept, a reusable first stage that would launch vertically and land on a runway.

Boeing will develop its “Phantom Express” vehicle for phases 2 and 3 of DARPA’s Experimental Spaceplane 1 (XS-1) program, which has the goal of performing 10 flights in 10 days to demonstrate responsive and low-cost launch. Phase 2 will cover development of the vehicle and ground tests though 2019, with a series of 12 to 15 test flights planned for phase 3 in 2020.

DARPA spokesman Rick Weiss said the value of the award to Boeing is $146 million. The award is structured as a public-private partnership, with Boeing also contributing to the overall cost of the program, but Boeing declined to disclose its contribution. “As it’s a competitive market, we do not plan to disclose our investment,” Boeing Phantom Works spokeswoman Cheryl Sampson said. “We are making a significant commitment to help solve an enduring challenge to reduce the cost of space access.”

It makes sense that Boeing won the contract, since that company also built the X-37B and knows how to do this. Moreover, with this contract it appears that DARPA is following in the footsteps of NASA initial cargo and crew commercial contracts, where the companies were required to commit some of their own capital for development, the costs were kept low, and the resulting spacecraft belonged to the company to market to the launch industry.

In this case, Boeing is going to have a first stage that it can combine with many other available upper stages to produce a rocket that can compete both with SpaceX and Blue Origin.

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How to land a space shuttle

6:01 pm

An evening pause: This talk was given in October 2016, so the speaker, Bret Copeland, readily admits with great humor that he is describing something that no longer happens. Nonetheless, there will come a time when this will be done again, by vehicles better made and more often used. It is important to know how it was done.

Hat tip Edward Thelen.

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After 7 years Cassini reaches Saturn’s solstice

3:55 pm

In 2010 NASA extended the Cassini mission orbiting Saturn for seven years to the planet’s next solstice, so that the spacecraft could observe Saturn, its moons, and its rings, for one full season of its 28 year orbit.

Today, Cassini reached that target.

NASA’s Cassini spacecraft still has a few months to go before it completes its mission in September, but the veteran Saturn explorer reaches a new milestone today. Saturn’s solstice — that is, the longest day of summer in the northern hemisphere and the shortest day of winter in the southern hemisphere — arrives today for the planet and its moons. The Saturnian solstice occurs about every 15 Earth years as the planet and its entourage slowly orbit the sun, with the north and south hemispheres alternating their roles as the summer and winter poles.

The article provides a detailed review of all the changes that have occurred during this long time period.

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Lawsuit by fired SpaceX employee goes to court

8:57 am

The jury trail of a lawsuit by a fired SpaceX employee, claiming that he was dismissed because he complained about bad practices at the company, has now begun.

A Los Angeles state court jury will be asked to decide whether Blasdell had good reason to believe testing documents were falsified and whether his firing was unjustified. “He went up the chain of command as he had learned in the Marines was the proper procedure,” Blasdell’s lawyer, Carney Shegerian, told jurors in his opening statement Tuesday. “He had nothing personal to benefit from this other than to do the right thing.” SpaceX made misrepresentations to the federal government, cut corners in areas where safety was concerned and labeled Blasdell “insubordinate” for pressing his concerns, Shegerian said.

Not surprisingly, the SpaceX lawyer disagreed:

“Jason Blasdell is not a whistle-blower and this is not a whistle-blower case,” SpaceX’s lawyer, Lynne Hermle, said in her opening statement. He never observed or conducted any unlawful testing of rocket parts, never complained about unlawful testing, and never brought any concerns about unlawful testing to federal authorities, Hermle told jurors.

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California woman arrested for selling space technology to China

8:51 am

A California woman has been arrested for smuggling space communications technology and equipment to China illegally.

Chen, a resident of the Los Angeles suburb of Pomona, is accused of violating the International Emergency Economic Powers Act, which controls the export of certain goods and technology from the United States.

Specifically, the indictment alleges Chen purchased and smuggled sensitive materials to China without obtaining required export licenses, including components commonly used in military communications “jammers.” She also is accused of smuggling devices typically used in space communications applications, and falsifying the paperwork used in shipping those items to list them as worth $500, rather than their true value of more than $100,000.

The exports in question date from March 2013 to December 2015.

How dare they arrest her! All she is doing is supporting international diversity against the white power oppression of the evil United States. Moreover, we must allow her to express her beliefs. Treason is merely an expression of one’s opinion, and must not be oppressed!

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Spacewalkers successfully replace failed unit on ISS

7:59 am

In a a short spacewalk just under three hours two astronauts today successfully replaced the failed MDM data relay unit on the outside of ISS.

Some additional details about this unit:

The MDM that failed and an identical unit are part of the tier 2 command architecture and relay commands to a variety of critical station systems, including the station’s guidance, navigation and control system, the lab’s stabilizing gyros, the environmental control system, the station’s cooling system and others.

Both tier 2 computers were installed during spacewalks March 30 and March 24 respectively, replacing two older units with models featuring upgraded data processing cards. It is not yet known whether the problem with MDM-1 involved the upgraded components or some other circuitry or software

I suspect this upgraded but failed unit is going to be looked at very carefully.

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The face of Ceres

9:35 am

The face of Ceres

Cool image time! The image on the right, reduced in resolution to show here, was taken by Dawn on April 29, 2017, when the spacecraft had been positioned between the Sun and the dwarf planet at a moment when its entire surface was lit. They have enhanced the colors to bring out the contrasts.

Images combining these different color filter perspectives reveal fine details of Ceres’ surface. For example, they emphasize the distinct compositions and textures of the material ejected from craters. The brightest region on Ceres, called Cerealia Facula, is highlighted in Occator Crater in the center of this image. Vinalia Faculae, the set of secondary bright spots in the same crater, are located to the right of Cerealia Facula.

One of the darkest regions on Ceres is next to Occator, and represents ejected material from the impact that formed the crater. The ejected material forms a large arc that extends over several hundred kilometers, below the center of Ceres in this image. That material’s distribution is partly determined by Ceres’ rotation.

Be sure to take a close look at the full image. It isn’t super high resolution, but it reveals a lot of interesting details

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Emergency spacewalk on ISS to replace electronics relay box

11:23 pm

Astronauts will perform an emergency spacewalk on May 23 to replace the failed MDM electronics relay box that failed on Saturday.

So, they have a spare on board, which is good. The article does note, however, that the unit that failed had only been installed less than two months ago, on March 30. This is not good. These units should last longer than two months, especially considering how critical they appear to be.

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Rocket Lab launch delayed

7:55 am

Capitalism in space: Rocket Lab has delayed its first test launch of its Electron rocket because of predicted high winds.

The company has not yet said if they have rescheduled for Tuesday.

This article gives a very detailed overview of the rocket, its engines, and the history of its launch site. It also notes that if successful, the launch will be first orbital flight ever from a commercial company from its own commercial launch site.

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Primary data relay electronics unit on ISS truss fails

9:00 pm

ISS managers are meeting to make a plan to deal with the failure on Saturday of the #1 data relay electronics box on the S0 truss of the station.

The unit, called an MDM, has an identical backup in place so no station operations have so far been effected. However, that backup had failed back in 2014 and required a spacewalk to replace it, so it is not clear to me as yet whether the station has any additional spares available to replace the newly failed unit. If so, it will still require a spacewalk to make the switch.

If there is no spare, they will likely have to ship one up on the next cargo flight, as the MDM is essential for operating the solar panels and radiators as well as the robot arms.

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The first 3 of a 200 nanosat constellation delivered for launch

8:24 am

Capitalism in space: Sky and Space Global (SAS) has delivered the first three nanosats — of a planned 200 nanosat constellation — to India for launch.

The first three nanosats are to be launched by India on its PSLV rocket, but SAS has contracted Virgin Orbit to use its LauncherOne to put the next 197 up. They had made this first announcement last summer, saying the first three would launch in the second quarter of 2017. It appears that they are holding to that schedule.

They also said that LauncherOne would begin launching the other 197 satellites in 2018. For this I remain far more skeptical, since the track record at Virgin in getting its spacecraft off the ground on schedule has not been good.

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Rocket Lab gets another contract

7:27 pm

Capitalism in space: With its first test launch set for Monday, Rocket Lab today earned a new launch contract, this time from Spaceflight, a company that acts as a charter company putting together launches for smallsat companies.

Spaceflight buys a launch from a rocket company, and then sells slots to smallsat companies that cannot afford to buy the whole launch. This way Spaceflight can tailor each launch to the needs of the different smallsats. Though they have previously purchased launches from India’s PSLV, Russia’s Dnepr, and SpaceX’s Falcon 9, Rocket Lab’s Electron fits this model more perfectly, because — as a small rocket designed for smallsats, it doesn’t require a lot of smallsats to fill its payload. Thus, they can offer the smallsats on board access to orbits not normally available. This will make it relatively easy to find customers for the launch.

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Mars rover update: May 15, 2017

12:31 pm

This update could also be entitled, “Up and down into Martian gullies,” as that is what both rovers, Curiosity and Opportunity, are presently focused on doing.

Curiosity

Curiosity's position, Sol 1696 (May 12, 2017)

For the overall context of Curiosity’s travels, see Pinpointing Curiosity’s location in Gale Crater.

In the past month, since my previous April 21, 2017 update, Curiosity has been working its way up the dry wash, frequently stopping to inspect the rocky surface terrain within. As they note,

As we climb up Mount Sharp, recently over slopes of 4-6 degrees, we have seen more varied outcrop structures and chemistries than the rest of the Murray formation, and such changes catch the collective eye of the team.

Only in the last week have they shifted to the east, as planned. Their near term goal is the lighter, yellowish layer of rock, dubbed the Hematite Unit, that sits higher up the slope of Mount Sharp. As they have been traveling on the Murray Formation now for more than a year, since March, 2016, I am certain the science team is even more eager to get to this different layer of geology to find out what it is made of and why it is there.

You can get an overall view of the geology Curiosity is traversing from this October 3, 2016 press release. Below is a version of the traverse map shown at that site that I posted as part of my October 6, 2016 rover update, updated to show Curiosity’s present location. It is apparent that Curiosity is finally moving out of the foothills below Mount Sharp and beginning its climb up the mountain’s actual slopes.
» Read more

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Engine test of Blue Origin BE-4 engine goes bad

9:12 am

Capitalism n space: Blue Origin today revealed that an engine test of its BE-4 rocket engine, intended for sale to ULA as well as the basis for their own New Glenn rocket, went wrong.

In a rare update, the Blue Origin space venture founded by Amazon billionaire Jeff Bezos reported that it lost a set of powerpack test hardware for its BE-4 rocket engine over the weekend, but added that such a setback is “not unusual” during development. “That’s why we always set up our development programs to be hardware-rich,” the company tweeted today. “Back into testing soon.”

The announcement was via a tweet, and they have released no additional details.

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Rocket Lab sets May 21 for first test launch of its Electron rocket

9:07 am

Capitalism in space: Rocket Lab today announced that it has scheduled the first test flight of its Electron rocket for May 21.

The company is setting expectations for a test launch that may suffer delays and could end in failure. “During this first launch attempt it is possible we will scrub multiple attempts as we wait until we are ready and conditions are favorable,” Beck said in the statement.

The launch, as the company’s name for it emphasizes [“It’s a test], is a test flight, with no satellite payload on board. The launch is the first of three such test flights Rocket Lab plans before beginning commercial launches later this year.

Rocket Lab plans to carry out the launch largely out of public view. The company said a press kit about the mission that there will be no public viewing sites in the vicinity of its New Zealand launch site for this mission. There are also no plans to webcast the launch, although the company said it will provide video footage “following a successful launch.”

Although Rocket Lab is launching from New Zealand, the company is headquartered in the United States, and thus will require a launch license from the U.S. Federal Aviation Administration for this and future Electron missions. As of May 14, the FAA had not published a launch license for this flight. [emphasis mine]

I have highlighted the last paragraph above because it is to me the most interesting part of this entire story. What happens if Rocket Lab never gets its U.S. launch license and launches anyway? They are launching on foreign soil. It really is none of the FAA’s business, even if the company is based in the U.S. Will they fine them? Call them names?

I suspect that one reason they have made the announcement first, before getting their license, is to pressure the FAA bureaucrats to get off their duffs and get moving. In the past both Virgin Galactic and SpaceX have done the same thing, and got their licenses very quickly thereafter.

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