Tag: engineering

NOAA still struggling to get GOES 17 working

1:12 pm

NOAA is still struggling to pinpoint and correct the problem in GOES 17, launched in March, that prevents it from taking certain infrared weather images.

In a teleconference with reporters, NOAA officials said they had been able to improve the availability of infrared and near-infrared channels on the Advanced Baseline Imager (ABI) instrument on the GOES-17 satellite since the agency first reported the problem two months ago. The spacecraft, originally known as GOES-S, launched in March. “ABI is already demonstrating improved performance from what was initially observed,” said Pam Sullivan, director of the GOES-R system program. Currently, 13 of the instrument’s 16 channels are available 24 hours a day, with the other three able to operate at least 20 hours a day.

That will change, though, on a seasonal basis, depending on the amount of sunlight that shines into the instrument. By September, the hottest part of the orbit, only 10 of 16 channels will be available 24 hours a day, she said, with the other six available “most of the day.”

The satellite is second satellite launched out of a four satellite constellation that NOAA is building for $11 billion. They have now also admitted that the same problem exists on the first satellite, but does not seem to be effecting performance in the same way.

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NASA delays launch of Parker Solar probe, again

9:41 am

For the second time NASA has delayed the launch of the Parker Solar probe due to issues related to the Delta IV Heavy rocket.

The United Launch Alliance Delta IV Heavy was originally scheduled to launch the Parker Solar Probe on Aug. 4, before what NASA described as “a minor tubing leak” was discovered at the processing facility in Titusville. The launch slipped to Aug. 6 and now NASA and its mission partners are targeting Aug. 11 for a 45-minute launch window at 3:48 a.m. from Cape Canaveral Air Force Station.

The latest delay comes after “a small strip of foam was found inside the (spacecraft) fairing,” during final inspections after the spacecraft was encapsulated in the Delta IV Heavy nose cone, according to NASA.

The launch window closes on August 19, so there better not be many more problems.

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SpaceX and Arianespace both launch multiple satellites

9:22 am

Capitalism in space: SpaceX and Arianespace both had successful early morning commercial launches today.

The Ariane 5 delivered 4 Galileo GPS satellites, while SpaceX placed in orbit 10 Iridium communications satellites. SpaceX also successfully recovered the first stage.

The leaders in the 2018 launch standings:

20 China
14 SpaceX
8 Russia
5 ULA
4 Japan
4 Arianespace

In the national rankings, the U.S. and China are once again tied, now at 20-20.

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Another skylight entrance pit found on Mars

1:22 pm

Pit in Hephaestus Fossae

Cool image time! In my routine monthly review of the hundreds of new images released from the high resolution camera on Mars Reconnaissance Orbiter (MRO), I came across another most intriguing geological feature, the image of which is posted to the right, after cropping.

As the scale shows, the pit is about 300 feet across. Calculating the pit’s depth would require someone with better math skills than I. The website provides information about the sun angle, which can be used to extrapolate the shadows and then roughly calculate the depth.

The most fascinating aspect of this pit is the impression of incredible thinness for the pit’s overhung edges. All of the pit’s edges appear significantly overhung, and the thickness of the overhang seems incredibly paper-thin. This thinness is likely only an illusion, though in Mars’s light gravity it is perfectly possible for the overhang to be far thinner and more extended than anything you would find on Earth.

The image itself is in color, though the only color visible is within the pit itself. In that blueness at the base it seems to me that there is a pile of dust/debris, but once again, that conclusion should not be taken very seriously.

If you take a look at the full image, what is impressive is the bland flatness of the surrounding terrain. There is no hint that there might be underground passages hidden here. While most of the scattered craters are probably impact craters, many (especially those with unsymmetrical shapes) could be collapse features indicating the presence of underground voids. None however is very deep. Nor is there any other pits visible.

Below is a global map of Mars with the location of this pit indicated by a black cross. It is just on the edge of the transition zone between the lower northern plains and the southern highlands, where the shoreline of an intermittent sea is thought by some scientists to have once existed. This is also an area where not a lot of high resolution images have been taken, mostly because of its apparent blandness as seen in previous imagery.

This image demonstrates however that Mars is going to have interesting geology everywhere, and that we won’t really know it well until we have explored it all.
» Read more

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A Chinese skyscraper with a waterfall

10:48 am

Link here. The builders literally included a 350 foot high waterfall that exits the skyscraper and falls down the building’s side.

A spokesperson for the property, Mr Cheng, told Kan Kan News that the main water source is from recycled tap water, rain water or from other channels. ‘Our building has a four-storey underground water storage and drainage system, from which the water is pumped and recycled,’ Mr Cheng said.

The electricity bill for just one hour of operation is a whopping 800 yuan (£89), he added. ‘That’s why we don’t switch on the waterfall every day – only for special festivities in the city,’ he said. And each time, the waterfall is set to run for only about 10 to 20 minutes to save electricity.

Architects for skyscrapers are getting increasingly creative. They have added trees, vines, greenery everywhere. A waterfall, however, is really clever, though I’m not sure how practical this will be, in the long run. Water falling that distance can do a lot of damage over time.

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Interstellar Technologies releases video of launch failure

10:33 am

Capitalism in space: The private Japanese company Interstellar Technologies today released a video of its June 30th launch failure.

The company is investigating the exact cause of the June 30 failure, which saw the 33-foot (10-meter) tall MOMO-2 lift off from a test site near the town of Taiki on Japan’s island of Hokkaido before crashing to the ground seconds later after it lost thrust. “The cause of the MOMO-2 failure is still under investigation,” Takahiro Inagawa, IST’s CEO, told Astrowatch.net. “However, we assume that its engine and hot-gas thruster for the roll control are responsible.

They say they are proceeding toward their third launch attempt.

[A]lthough the exact date of the launch has not been disclosed, Inagawa said that MOMO-3’s flight should be expected within months. “We will begin the next launch as soon as we are ready,” Inagawa said. “We were able to launch MOMO-2 within less than a year after MOMO-1. The launch interval of MOMO-3 and MOMO-2 will be shorter.”

I have embedded the video of the launch failure below the fold. You do want to view this. Trust me.
» Read more

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Is the entrance to space 80 kilometers up instead of 100?

9:56 am

A new analysis by one scientist suggests that the official line when one enters space should be lowered from 100 kilometers to 80 kilometers.

A close look shows that the traditional definition flies in the face of evidence, says Jonathan McDowell, an astrophysicist at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts. As a hobby, McDowell compiles an influential, detailed record of rocket launches online.

…Most people continued to use 100 kilometers as a boundary, including the World Air Sports Federation (FAI) in Lausanne, Switzerland, the keeper of outer space records. Although definitions are always points of contention in science, it seemed worthwhile to McDowell to dig deeper, knowing such companies as Virgin Galactic and Blue Origin could soon be offering tourism flights to this boundary realm.

He started with data: namely, public records of satellite telemetry he had downloaded from the North American Aerospace Defense Command about the orbits of 43,000 satellites. Most didn’t matter for his project—they orbited far too high above the edge of outer space. But at least 50 had orbits that occasionally operated below 100 kilometers, such as the Soviet Elektron-4 satellite, which made 10 spins at 85 kilometers or below before disintegrating into the atmosphere in 1997. “Are you going to say [these satellites are] in space and then not in space every 2 hours?” he asked. “That doesn’t seem very helpful.” Below 80 kilometers, the story changes: It is highly unlikely a satellite will make another orbit, as thickening atmosphere sends it to a fiery end.

Considering that the Air Force has for many years used 50 miles, which is about the same as 80 kilometers, all McDowell is doing is accepting the American definition rather than an international one. It is also amusing how his actions help Virgin Galactic, since there have been rumors for years that their SpaceShipTwo design was never going to go as high as 100 kilometers, and was going to use the Air Force 50 mile definition to say their passengers reached space.

Putting Virgin Galactic aside, however, the Air Force definition has always made more sense. As McDowell notes, it better describes the dividing line between orbital space and the atmosphere where no satellite can remain in orbit.

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Radiation maps of Europa

10:08 am

By culling together data from Voyager 1 and the Galileo orbiter, scientists have created a radiation map of the surface of Europa.

Using data from Galileo’s flybys of Europa two decades ago and electron measurements from NASA’s Voyager 1 spacecraft, Nordheim and his team looked closely at the electrons blasting the moon’s surface. They found that the radiation doses vary by location. The harshest radiation is concentrated in zones around the equator, and the radiation lessens closer to the poles.

Mapped out, the harsh radiation zones appear as oval-shaped regions, connected at the narrow ends, that cover more than half of the moon.

…In his new paper, Nordheim didn’t stop with a two-dimensional map. He went deeper, gauging how far below the surface the radiation penetrates, and building 3D models of the most intense radiation on Europa. The results tell us how deep scientists need to dig or drill, during a potential future Europa lander mission, to find any biosignatures that might be preserved.

The answer varies, from 4 to 8 inches (10 to 20 centimeters) in the highest-radiation zones – down to less than 0.4 inches (1 centimeter) deep in regions of Europa at middle- and high-latitudes, toward the moon’s poles.

This model, which by the way probably has large margins of error, will be used as a guide by the Europa Clipper scientists now planning that orbiter’s mission.

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A dark dust avalanche on Mars

10:01 am

No dust avalanche

After dust avalanche

Cool image time! The two images to the right, both cropped to post here, were taken six years apart by Mars Reconnaissance Orbiter (MRO) of the western lava slopes of the giant volcano Olympus Mons. They show the appearance of a dark dust avalanche during the interim. As noted by members of the MRO science team.

Dust avalanches create slope streaks that expose darker materials usually hidden below a lighter-toned layer. Cascading fine-grained material easily diverts around boulders or alters direction when encountering a change in slope. The dark steak … is approximately 1 kilometer in length that we didn’t see in a previous image. Past avalanche sites are still visible and fading slowly as dust settles out of the atmosphere and is deposited on the dark streaks over time.

We also see boulders and their shadows that are a meter or greater in size. Movement of any of these boulders down the slope could trigger future avalanches.

The appearance of these Martian dark streaks on slopes is actually not uncommon. As more pictures are taken of Mars scientists are beginning to accumulate a large number all across the Martian surface.

What I find fascinating is the wet look of these dark streaks. Below is a close-up of the new avalanche, near its head.
» Read more

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SpaceX successfully launches commercial communications satellite

9:54 am

Capitalism in space: SpaceX last night successfully launched Telstar 19v, a commercial communications satellite.

This was the second Block 5 rocket to fly successfully.

Correction: Previously I had said that these two flights served to satisfy NASA’s demands for seven successful Block 5 launches before they would certify it for commercial crew. It turns out that neither accomplishes this, because the tanks within are not the finalized versions. Thank you readers!

The leaders in the 2018 launch race:

20 China
13 SpaceX
8 Russia
5 ULA
4 Japan

In the national standings China is now only one launch ahead of the U.S., 20-19.

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Starliner has propellant leak during launch abort test

9:28 am

Capitalism in space: Boeing’s Starliner capsule experienced a propellant leak near the end of a launch abort test in late June.

The company said it conducted a hot-fire test of the launch-abort engines on an integrated service module at the White Sands Test Facility in New Mexico in June. The engines successfully ignited and ran for the full duration, but during engine shutdown an anomaly occurred that resulted in a propellant leak. “We have been conducting a thorough investigation with assistance from our NASA and industry partners,” the statement said. “We are confident we found the cause and are moving forward with corrective action.”

The capsule being tested is an engineering model, not one that is intended to fly. Boeing also has said that “they believe there is an operational fix to the problem rather than a need to significantly rework the Starliner spacecraft itself.”

This incident however is certain to delay Boeing’s crew launch schedule, especially considering NASA’s own timidity about the privately built space capsules. The agency will insist on a complete review, no matter how long it takes, even if the company has pinpointed the problem already and has instituted corrections.

In a normal world, this event should not effect SpaceX’s schedule. I also expect however that the agency will use this event to slow SpaceX down again, demanding further reviews there as well.

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Europe initiates website to name ExoMars 2020 rover

9:26 am

The European Space Agency has created a website where people can offer their suggestions to name the ExoMars 2020 rover.

Astronaut Tim Peake is leading the hunt for a great moniker. He wants everyone to go to a special website set up for the purpose and enter a suggestion. But don’t think “Spacey McSpaceFace” is a goer because this is not an online poll. All ideas will be put before an expert panel and it is they who will make the final choice.

If all goes right, 2020 should see two new rovers arrive on the Martian surface.

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A detailed look at upcoming SpaceX launch recovery operations

11:19 pm

Link here. They are expanding their drone fleet and their capsule recovery fleet. Though we should expect some big developments in the coming year, there was also this tidbit:

Earlier this year, the company’s president Gwynne Shotwell told CNBC that next year will see a decrease in the company’s launch cadence. The slip is due to a decline in the number of large geostationary communications satellites needing a launch.

Missions to a geostationary transfer orbit make up the majority of launches requiring a droneship recovery. Therefore, it is unlikely that two east coast droneships will be needed to support Falcon 9 over the next year or two.

It appears that after five years of effort, SpaceX has finally begun to clean out its backlog of contracted launches, caused by the initial development delays of the Falcon 9 and its two failures.

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China developing a robot satellite refueling spacecraft

11:11 pm

The new colonial movement: China today reported that it is developing a robot satellite that would attach itself to satellites that are out of fuel and use its own fuel to make the spacecraft usable again.

Hu Di, the chief designer of the vehicle, said compared with foreign research that focuses on refueling satellites that have run out of fuel, their option is much simpler and efficient. The vehicle will take about two years to complete.

Hu Di is wrong. In fact, I wonder if they have stolen this idea from Northrop Grumman, which as Orbital ATK has been developing a project exactly like this for several years.

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Hayabusa-2 finds Ryugu covered with scattered large boulders

11:02 pm

Hayabusa-2 has found that the asteroid Ryugu is covered with many scattered large boulders.

The Hayabusa 2 space probe discovered many boulders scattered on the asteroid Ryugu, suggesting it was formed from fragments of other celestial bodies, the Japan Aerospace Exploration Agency (JAXA) said July 19. More than 100 rocks larger than 8 meters in length were confirmed on the surface of the “spinning top” asteroid from images captured by Hayabusa 2, according to JAXA. The largest boulder was about 130 meters in length near the south pole.

The rocks are likely too big to be meteor fragments from collisions with Ryugu, which has a diameter of about 900 meters. “(The finding) is compelling evidence to prove that the Ryugu asteroid was formed by fragments of larger celestial bodies,” said Seiichiro Watanabe, head of the study team and professor of Nagoya University.

The asteroid’s slightly tilted axis of rotation gives Ryugu two seasons: summer and winter. Hayabusa 2 found the temperature ranged from about 20 to 100 degrees on Ryugu’s surface.

Surprise! This finding makes Ryugu very different from every other asteroid previously visited. Most have had relatively smooth surfaces, with lots of dust.

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Dust storm update on Mars

2:03 pm

Link here. This press release basically reviews what each Martian spacecraft, in orbit or on the surface, is doing to study or survive the global dust storm that erupted on Mars in in early June.

The storm itself has not yet eased, and the general expectation is that it will last for a couple of months, through August.

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Global mosiacs of Titan in infrared

8:53 am

Titan in infrared

The Cassini science team today released global infrared mosaics of Titan, created from images accumulated during the more than 100 fly-bys of the moon during the spacecraft’s thirteen years in orbit around Saturn.

The image on the right, cropped and reduced in resolution to post here, is only one such global mosaic. Go to the story to see them all.

Making mosaics of VIMS images of Titan has always been a challenge because the data were obtained over many different flybys with different observing geometries and atmospheric conditions. One result is that very prominent seams appear in the mosaics that are quite difficult for imaging scientists to remove. But, through laborious and detailed analyses of the data, along with time consuming hand processing of the mosaics, the seams have been mostly removed. This is an update to the work previously discussed in PIA20022.

Any full color image is comprised of three color channels: red, green and blue. Each of the three color channels combined to create these views was produced using a ratio between the brightness of Titan’s surface at two different wavelengths (1.59/1.27 microns [red], 2.03/1.27 microns [green] and 1.27/1.08 microns [blue]). This technique (called a “band-ratio” technique) reduces the prominence of seams, as well as emphasizing subtle spectral variations in the materials on Titan’s surface. For example, the moon’s equatorial dune fields appear a consistent brown color here. There are also bluish and purplish areas that may have different compositions from the other bright areas, and may be enriched in water ice.

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New close-up images of Ceres

12:15 pm

Cerealia Facula on Ceres

Cool image time! The image on the right, cropped and reduced in resolution to post here, is one of two images released today by the Dawn science team of the double bright spots found in Occator Crater, taken from the spacecraft’s tight final orbit above Ceres. This image shows what they have dubbed Cerealia Facula. The second image shows Vinalia Faculae.

This mosaic of Cerealia Facula is based on images obtained by NASA’s Dawn spacecraft in its second extended mission, from an altitude as low as about 21 miles (34 kilometers). The contrast in resolution obtained by the two phases is visible here, reflected by a few gaps in the high-resolution coverage. This image is superposed to a similar scene acquired in the low-altitude mapping orbit of the mission from an altitude of about 240 miles (385 km).

Inset of Cerealia Facula

The second image on the left is a crop at full resolution of the area in the white box above. This gives you a taste of the many interesting things found in the full resolution image. For example, the bright spots scattered throughout this image suggest they are recent upwellings from below. The ridgelines in the upper right are either the remains of the water-ice volcano they think once stood here but subsequently slumped back down to form a depression, or pressure ridges being pushed up by later upwellings.

The full image has lots more. So does the image of Vinalia Faculae. Check them out.

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Chinese officials quite rightly dismiss LOP-G

11:07 am

At a science workshop in Europe this week Chinese space officials made it clear that they found the concept of NASA Lunar Orbiting Platform-Gateway (LOP-G) to be unimpressive and uninteresting.

Moreover, they said that while it appears we will be delaying our landings on the Moon for at least a decade because of LOP-G, they will be focused on getting and building a research station on the surface, right off the bat.

Overall, Pei does not appear to be a fan of NASA’s plan to build a deep space gateway, formally known as the Lunar Orbital Platform-Gateway, at a near-rectilinear halo orbit. Whereas NASA will focus its activities on this gateway away from the Moon, Pei said China will focus on a “lunar scientific research station.”

Another slide from Pei offered some thoughts on the gateway concept, which NASA intends to build out during the 2020s, delaying a human landing on the Moon until the end of the decade at the earliest. Pei does not appear to be certain about the scientific objectives of such a station, and the deputy director concludes that, from a cost-benefit standpoint, the gateway would have “lost cost-effectiveness.”

The Chinese are right of course. LOP-G is merely a fake project to justify SLS and Orion, designed not to explore space but to provide Congress a jobs program on Earth. It will hand the Moon to China, while we dither in lunar orbit.

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Another successful test flight for second New Shepard suborbital spacecraft

10:52 am

Capitalism in space: Blue Origin today completed another successful test flight for its second New Shepard suborbital spacecraft.

This flight tested the capsule’s launch abort capabilities. It was also this spacecraft’s third flight. The link provides a replay of the full broadcast. I have embedded this below the fold. The launch is at about 29 minutes.

More info here.
» Read more

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A petition to kill SLS/Orion and LOP-G

12:54 pm

Link here. To quote their announcement at the link:

What’s killing America’s human access to space? Three projects: a rocket called the Space Launch System, a capsule called the Orion, and a new project called the Lunar Orbital Platform-Gateway.

These three programs are political boondoggles, pork, pie in the sky, jobs programs disguised as space programs. The Space Launch System, for example, is touted as the biggest rocket ever built. But its $30 billion development cost is eating up almost all of NASA’s human budget for deep space. Compare that $30 billion with the cost of developing Elon Musk’s Falcon Heavy—less than a billion dollars. In other words, for the cost of developing the Space Launch System, we could develop thirty brand new rockets if we took the Elon Musk route. Or we could develop an entire Moon and Mars program.

After thirteen years of promises, the Space Launch System has never flown. And when it does, it will cripple NASA. The cost of one launch will be between one and two billion dollars. For that price, you could buy between eleven and 22 launches of the Falcon Heavy. You could buy the launches for an entire Moon and Mars program.

What’s worse, after the launch of each Space Launch System rocket, we will throw the exorbitantly-priced rocket away, then we will be forced to buy another one. Meanwhile, Elon Musk and Jeff Bezos are making rockets reusable. And reusable rockets, like reusable busses, trucks, trains, cars, and airplanes, will lower our cost of access to space dramatically.

Then there’s the Orion capsule that the SLS will fling into space. It cannot land. It can’t land on the Moon. It can’t land on Mars. And it’s too small to carry crews to Mars. It is a boondoggle.

Topping it all off is the Lunar Orbital Platform – Gateway, another nipple in the mouth of the Space Military Industrial Complex, another make-work program. It is a mini space station orbiting the moon. It’s useless and can’t even be manned or womanned year-round. But it will cost so much to build that we’ll never be able to build lunar landers. We won’t touch down on the moon. We’ll simply circle the moon from a distance and watch with frustration as the Chinese land human beings. [emphasis in original]

The last point about LOP-G is especially important. It is designed not to promote the exploration and settlement of the solar system, but as a kind of purgatory where the U.S. will remain trapped in lunar orbit, accomplishing nothing, while other nations land and settle the Moon.

I have signed. Anyone who has been reading Behind the Black or listening to me for the past decade will know that this has been my position, from the get-go. I am very glad that others in the space industry are now standing up to echo that position.

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Mars rover update: July 17, 2018

12:35 pm

Summary: Curiosity climbs back up onto Vera Rubin Ridge to attempt its second drillhole since drill recovery, this time at a spot on the ridge with the highest orbital signature for hematite. Opportunity remains silent, shut down due to the global dust storm.

For a list of past updates beginning in July 2016, see my February 8, 2018 update.

Curiosity

Curiosity's travels on and off Vera Rubin Ridge

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

In the almost two months since my May 23, 2018 update, a lot has happened, much of which I covered in daily updates. Curiosity found a good drill spot to once again test the new drilling techniques designed by engineers to bypass its stuck drill feed mechanism, and was successful in getting its first drill sample in about a year and a half. The rover then returned uphill, returning to a spot on Vera Rubin Ridge that, according to satellite data, has the highest signature for hematite on the entire ridge. The light green dotted line in the traverse map to the right shows the route Curiosity has taken back up onto Vera Rubin Ridge. The red dotted line shows the original planned route off the ridge and up Mount Sharp.
» Read more

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Lockheed Martin key investor in Rocket Lab

9:39 am

Capitalism in space: In this article about how Lockheed Martin and a smallsat rocket company have won launch development contracts from the British government in connection with the UK’s first spaceport in Scotland was this tidbit of information I have never known:

Lockheed Martin and Orbex, a UK-based company development a small satellite booster, have announced their intention to launch from Sutherland. Lockheed Martin will receive £23.5 million ($31.1 million) and Orbex will get £5.5 million ($7.3 million) from the U.K. Space Agency to advance work on their launcher programs.

The British government, Lockheed Martin and Orbex made their announcements at the Farnborough International Airshow.

Lockheed Martin is reportedly interested in launching a variant of Rocket Lab’s Electron booster from the Sutherland site. The U.S. aerospace contractor is a strategic investor in Rocket Lab, which already operates an orbital spaceport in New Zealand, and is planning to develop a U.S. launch pad for the Electron vehicle, which has made two test flights to date. [emphasis mine]

It sounds as if Lockheed Martin, after funding Rocket Lab and letting it do all the initial risky development, is now moving in to use its vast resources to develop its own competitive smallsat rocket, possibly using some of the knowledge gained by Rocket Lab.

Hat tip reader Steve Golson.

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India tests upgraded rocket engine

10:17 pm

The new colonial movement: India’s space agency ISRO has successfully tested an upgraded version of the Vikas rocket engine it uses in its PSLV and GSLV rockets.

The test was conducted on Sunday, and validated the performance adequacy of Vikas Engine to be used in the upcoming second developmental flight of GSLV Mk-III

Vikas Engine, a workhorse liquid rocket engine designed by the Indian Space Research Organsiation (ISRO), powers the second stage of Polar Satellite Launch Vehicle (PSLV) of India. It also powers the second stage and the fourth strap of Geosynchronous Launch Vehicle (GSLV) and the twin-engine core liquid stage (L110) of GSLV Mk-III.

Essentially India here is doing what SpaceX did with its Merlin engine. Rather than start over with a new engine, they are upgrading it, a process that is faster and less expensive. And as they do it, they remain operational and competitive in the launch market, with as many as five launches now scheduled before the end of 2018.

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ArianeGroup successfully tests solid rocket booster

10:11 pm

Capitalism in space: ArianeGroup today successfully tested the solid rocket booster that it will use on both its Ariane 6 and Vega-C rockets in the 2020s.

The test success is good news for ArianeGroup, but this quote is actually more significant:

A compromise reached in May by European Space Agency members funding launch vehicle development will keep production of the P120C in Italy, allowing Avio to produce up to 35 boosters annually. A previous arrangement would have split production between Colleferro, Italy-based Avio and MT Aerospace of Augsburg, Germany.

The economies of scale provided by using the same booster for two rockets and concentrating production in one place are a key aspect of reducing the price for Ariane 6 missions by 40 to 50 percent compared to the Ariane 5 in use today.

Faced with stiff competition from SpaceX, the European Space Agency (ESA) gave ArianeGroup the power to structure operations more efficiently rather than cater to the pork desires of the agency’s many member nations.

Whether either Ariane 6 or Vega-C can compete with SpaceX’s reusuable rockets however remains doubtful. I expect that almost all of ArianeGroup’s customers in the next decade will be ESA member nations, required to buy its more expensive services.

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A weird lunar lava field

2:43 pm

Weird terrain at Ina on the Moon

Cool image time! The image on the right, reduced and rotated 180 degrees to post here, comes from a recent release for Lunar Reconnaissance Orbiter (LRO). It shows a flow of lava that partly covers an older terrain.

Some scientists propose that Ina formed as very young (less than 100 million years) volcanic eruptions because only a few larger impact craters (>20 m) have formed on its surface. Others believe it is quite ancient (3.5 billion years), possessing highly unusual physical properties that stifle the formation of normal impact craters. At least everybody agrees it was formed as basalt was erupted to the surface! But how and when Ina formed remains open.

Ina’s morphology is so unusual that it is easy to see inverted topography – that is, craters appear as bubbles rather than bowls! Think of Ina as a cast iron frying pan with freshly poured pancake batter; the wiggly textured material is the frying pan and the bulbous smoother mounds are the batter.

The image to the right has been rotated 180 degrees so that my mind at least can see it with the craters as bowls and the uplifted smooth lava as uplifted. If this doesn’t work for you, click on the link and look at the original image.

While some scientists think the lava flows are recent, no one knows at present the origins of the rougher terrain that the lava has partly obscured.

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Boeing puts foam insulation on one SLS tank

9:10 am

My heart be still: Asked by NASA management to pick up the pace, Boeing managed to put foam insulation on one of the SLS oxygen tanks in less than two weeks.

The reason NASA wanted to pick up the pace? In May contamination had been found in the system’s supply lines.

“The prime contractor determined the vendor was not fully cleaning the tubes and it was leaving residue in the tubes,” McErlean said. “This was retained as a requirement in the prime contractor’s spec, but it was not properly carried out.” Boeing is the prime contractor for the SLS core stage, but he did not disclose the vendor who provided the contaminated tubing.

The contamination was initially found in a single tube, he said, but later checks found similar residue in other tubes. All the tubing in the core stage is now being inspected and cleaned, a process he said is not straightforward because of the “mass of tubing” in the engine section and also because cleaning is a “non-trivial process.”

In reading the first link above, however, I do not get the sense that things with SLS are really moving quickly. Instead, I get, as I have for this entire project, the sense that the pace is designed to proceed at a glacial pace. Thus, when they need to get things done more more quickly, they can easily do so. Whether that increased speed is really fast, however, remains to me quite questionable.

Note: My appearance tomorrow night on the John Batchelor Show will be focused entirely on NASA’s effort to slow commercial space down, so as to reduce the embarrassment to SLS. I am going to make believe I am giving a briefing to Mike Pence and the National Space Council, explaining in detail why NASA actually seems hostile to getting anything done.

It is our hope that maybe someone in the administration might hear it, and rethink the Trump space policy.

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Binary asteroid imaged by radio telescopes

10:18 am

Three radio telescopes have successfully imaged the rotation of a binary asteroid, the fourth such binary so far discovered.

On June 21, the asteroid 2017 YE5 made its closest approach to Earth for at least the next 170 years, coming to within 3.7 million miles (6 million kilometers) of Earth, or about 16 times the distance between Earth and the Moon. On June 21 and 22, observations by NASA’s Goldstone Solar System Radar (GSSR) in California showed the first signs that 2017 YE5 could be a binary system. The observations revealed two distinct lobes, but the asteroid’s orientation was such that scientists could not see if the two bodies were separate or joined. Eventually, the two objects rotated to expose a distinct gap between them.

Scientists at the Arecibo Observatory in Puerto Rico had already planned to observe 2017 YE5, and they were alerted by their colleagues at Goldstone of the asteroid’s unique properties. On June 24, the scientists teamed up with researchers at the Green Bank Observatory (GBO) in West Virginia and used the two observatories together in a bi-static radar configuration (in which Arecibo transmits the radar signal and Green Bank receives the return signal). Together, they were able to confirm that 2017 YE5 consists of two separated objects. By June 26, both Goldstone and Arecibo had independently confirmed the asteroid’s binary nature.

The new observations obtained between June 21 and 26 indicate that the two objects revolve around each other once every 20 to 24 hours. This was confirmed with visible-light observations of brightness variations by Brian Warner at the Center for Solar System Studies in Rancho Cucamonga, California.

I have embedded below the fold a short video that includes the radio images showing this rotation. Most cool!
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