Tag: engineering

Mars or a bacterial cell?

8:48 am

Mars's southern polar regions

Cool image time! The image on the right, reduced and cropped to show here, was taken by Mars Reconnaissance Orbiter and shows just one spot in Mars’s southern polar regions. The surface only looks like bacteria because the basic structure of both is based on fractals. Scientists call this area “swiss-cheese terrain” because of the many holes that have opened up there.

The texture is very alien, bearing more of a resemblance to the universe of the very small, rather than the universe far, far away. But if this is a polar cap, then why does it not look like the polar caps on Earth? Indeed, there is no equivalent terrain observed here on Earth.

The so-called “Swiss cheese terrain,” referencing the numerous holes of the region, is a product of seasonal exchange between the surface and the Martian atmosphere. With a predominantly carbon dioxide content at 98 percent, the colder temperatures condense the gas out of the atmosphere to produce dry ice. The prevalence of water is more concentrated in the north, leaving the South polar region more carbon dioxide rich, and it’s this difference in composition that generates the unusual texture of the Swiss cheese terrain.

Be sure and take a look at the full resolution image. It is quite wild.

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Cassini movie flying past Saturn’s rings

8:37 am

movie of Cassini flying past Saturn's rings

Cool image time! The Cassini science team has assembled a short movie from 21 images taken by the spacecraft during its August 20th dive between the rings and Saturn. That animation is to the right.

Only two weeks remain in the Cassini mission. The spacecraft dives into Saturn on September 15.

The spacecraft is expected to lose radio contact with Earth within about one to two minutes after beginning its descent into Saturn’s upper atmosphere. But on the way down, before contact is lost, eight of Cassini’s 12 science instruments will be operating. In particular, the spacecraft‘s ion and neutral mass spectrometer (INMS), which will be directly sampling the atmosphere’s composition, potentially returning insights into the giant planet’s formation and evolution. On the day before the plunge, other Cassini instruments will make detailed, high-resolution observations of Saturn’s auroras, temperature, and the vortices at the planet’s poles. Cassini’s imaging camera will be off during this final descent, having taken a last look at the Saturn system the previous day (Sept. 14).

The second link above gives a detailed moment-by-moment breakdown of the final six days.

I would have posted this earlier this week, but my limited internet access made it impossible. Sorry about that.

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India’s PSLV rocket fails to release satellite

6:16 am

India’s PSLV rocket failed to put a navigation satellite into orbit yesterday when the payload fairing did not separate.

The PSLV has had an excellent launch record, so this failure is unfortunate and a surprise. Whether it will effect that rocket’s next launch, putting two Google Lunar X-prize contestants into space, remains unknown.

We are about to leave Torry and head home. Further posts will be on the road, assuming I can get service.

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Angola establishes its first space strategy

7:50 pm

The new colonial movement: Angola has enacted its first space strategy, aimed at encouraging a new space industry in that nation.

The document is mostly government bureaucratic blather. More important, it seems mostly centered on what Angola’s governmental space agencies will do in the future. The policy makes nice about encouraging the private sector, but offers little to actually accomplish this.

Nonetheless, this action once again shows that more and more countries across the globe want in on the exploration of the solar system. The international competition is going to be fierce.

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Akatsuki finds super-rotating equatorial jet on Venus

4:56 pm

Japan’s Venus orbiter Akatsuki has discovered a previously unseen equatorial jet with wind speeds that often exceed 200 miles per hour.

The winds, named “equatorial jet” by the research team, were found from July to August 2016 when an infrared camera captured images of areas about 45 to 60 kilometers above the planet’s surface. The areas are invisible at optical wavelengths due to extremely dense clouds of sulfuric acid. The camera spotted thick clouds traveling at a speed of 288 kph to 324 kph near the planet’s equator.

Based on the news reports, it appears the significance of this discovery is that they identified a particular jet stream at a specific latitude. Previous observations did not have that resolution.

This would have been posted in the morning, but the internet access here in this Torrey hotel is almost as slow as what I experienced in Glacier. I had it written, but I sinply couldn’t get it to post this morning.

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Problems with 6 of 72 cubesats launched by Soyuz

8:12 am

Of the 72 cubesats launched by a Russian Soyuz rocket on July 14, 6 have unexpected problems.

Four of the 72 miniature satellites sent into orbit July 14 on a Russian Soyuz 2.1a rocket alongside the primary customer, the Kanopus-V-IK Russian Earth-imaging satellite, are not responding to commands from their operators and two additional cubesats are not in their intended orbits.

It appears that a variety of causes are behind the problems, not all of which are related to the Soyuz.

Posted from Torrey, Utah, just outside Capitol Reef.

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Russia and China to team up to explore Moon?

1:19 pm

Russia and China appear ready to sign a cooperative agreement involving the joint exploration of the Moon from 2018 to 2022.

The deal is expected to be signed this October and will bring significant benefits to both nations, particularly in manned and future missions to the moon….

The bilateral agreement will cover five areas including lunar and deep space exploration, developing special materials, collaboration in the area of satellite systems, Earth remote sensing, and space debris research.

No details yet. Moreover, the deal itself has not yet been signed, so this might all vanish into the ether. It does appear however that Russia’s financial problems are forcing it to partner with others, and China presently has a very sophisticated but inexperienced space program and lots of cash. Russia’s experience would be a great help to China, until they don’t need it anymore. Thus, the logic of the agreement.

Posted from the lobby of the Swiftcurrent hotel at the Many Glacier area of Glacier National Park. Diane completed a 10 mile hike today early, so we have the afternoon to relax. Tomorrow we make the long drive south to Capital Reef.

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SpaceX postpones Mars Dragon missions

9:55 pm

Based on statements from one NASA official, it appears that SpaceX has put its plans to fly a Dragon capsule to Mars on “the back burner.”

Jim Green, head of NASA’s planetary science division, told Spaceflight Now in an interview that SpaceX has told the agency that it has “put Red Dragon back on the back burner.”

“We’re available to talk to Elon when he’s ready to talk to us … and we’re not pushing him in any way,” Green said. “It’s really up to him. Through the Space Act Agreement, we’d agreed to navigate to Mars, get him to the top of the atmosphere, and then it was up to him to land. That’s a pretty good deal, I think.”

It is my impression that, because NASA has forced SpaceX to give up on propulsive landing of its Dragon manned capsules, the company cannot afford to invest the time and money on it themselves, and thus do not have a method yet for landing a Dragon on Mars. Thus, they must postpone this program.

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Water ice found near Martian equator

8:27 am

A review of old Mars Odyssey data has revealed the presence on Mars of water ice near the planet’s equator.

The article makes a big deal about the importance of this discovery for the possibility of past or even present life on Mars. I say that its real importance relates to future colonists, and cannot be understated.

I should add one caveat: The resolution of the data is not great, 290 kilometers, which leaves a lot of room for error.

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Proton successfully launches Russian military satellite

8:19 am

Russia today successfully used its Proton rocket to place a military communications satellite in orbit.

Though primarily a military satellite, it will also be used by civilian customers as well.

Meanwhile, in their effort to recover from last year’s engine recall that practically shut down their launch industry, the Russians are trying to up their launch rate, with additional Proton launches now set for September 9 and 28. At the moment, they and SpaceX are tied for the most launches in 2017, and I suspect it will be a neck and neck race for the rest of the year.

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Japan’s beginning shift to commercial space

9:08 am

Link here. The article provides a good sense of the state of Japan’s private space industry, which at this moment is generally restricted one company, Interstellar Technologies, and its as yet unsuccessful effort to launch a suborbital rocket. The following quote however helps explain why Japan has been unable to interest anyone in buying its H-2A rocket for commercial launches.

Launch costs associated with Japan’s main H-2A rocket are about ¥10 billion per launch (about $90 million), so miniature satellites often ride together with bigger satellites. A period of 50 days is required between launches, meaning the number of launches is low in Japan compared to countries including the United States, Europe, Russia, China and India. Large satellites are given priority in the launch schedule, so it is often difficult to choose a launch window for miniature satellites. [emphasis mine]

I think the $90 million price is a significant reduction from what JAXA used to charge. Fifty days to prep for launch however is ungodly slow.

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Russia to launch twice from Vostochny this year

8:51 am

Russian Deputy Prime Minister announced today that Russia will launch satellites from its new spaceport in Vostochny twice in 2017, first on November 28 and second on December 22.

On July 3, Rogozin said Russia would conduct five launches from the Vostochny space center in 2018. On July 11, Russia’s Roscosmos State Space Corporation head Igor Komarov said the agency was determined to launch up to five carrier rockets for its foreign clients from Vostochny every year starting in 2019.

It appears that the Russian leadership decided to accelerate the launch schedule and move two of those 2018 launches to November and December, 2017. They must be feeling the competitive pressure coming from SpaceX, which has essentially stolen almost their entire share of the commercial launch market.

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Google Lunar X-Prize extends deadline

8:39 am

Capitalism in space: The Google Lunar X-Prize has announced that it has extended its contest deadline from the end of 2017 to the end of March 2018 for the finalists to complete their lunar rover mission and win the grand prize of $30 million.

They also announced several additional consolation prizes that all of the remaining five contestants can win should they achieve lunar orbit ($1.75 million) or successfully achieve a soft landing ($3 million), even if they are not the first to do it.

At least one team, Moon Express, will be helped enormously by the extra three months. This gives Rocket Lab just a little extra time to test its rocket before launching Moon Express’s rover to the Moon.

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Ten planetary probes track a solar eruption through the solar system

9:02 am

The path of an October 2014 solar eruption was tracked by ten different spacecraft, including Curiosity on the surface of Mars, as its blast moved outward through the solar system.

The measurements give an indication of the speed and direction of travel of the CME [Coronal Mass Ejection], which spread out over an angle of at least 116 degrees to reach Venus Express and STEREO-A on the eastern flank, and the spacecraft at Mars and Comet 67P Churyumov–Gerasimenko on the western flank.

From an initial maximum of about 1000 kilometers per second (621 miles per second) estimated at the sun, a strong drop to 647 kilometers per second (402 miles per second) was measured by Mars Express three days later, falling further to 550 kilometers per second (342 miles per second) at Rosetta after five days. This was followed by a more gradual decrease to 450–500 kilometers per second (280-311 miles per second) at the distance of Saturn a month since the event.

The CME was first detected by solar observatories Proba-2, SOHO, Solar Dynamics Observatory, and STEREO-A.It was then tracked as it moved outward by Venus Express, Mars Express, MAVEN, Mars Odyssey, Curiosity, Rosetta, Cassini, and even New Horizons and Voyager 2.

On my last appearance on Coast to Coast, I was specifically asked if the probes to Venus, Mars, and other planets have the capability to track solar events. I knew that the Voyager spacecraft had equipment to do this, but was unsure about other planetary probes. This article answers that question.

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More Russian launch delays

8:50 am

Three stories out of Russia today suggest that that country’s aerospace industry has not yet fixed all of its quality control problems.

The last two stories both refer to the launch of Germany’s Spektr-RG, which was originally supposed to launch in 2014. The most recent schedule said the astronomical observatory would be launched in September 2018. That they need an extra month in order to “integration and ground development of the Spektr-RG spacecraft” does not seem out of line. At the same time, that they do not provide any reasons for the delay raises questions.

Meanwhile, that the Proton rocket for the Amazonas-5 launch has not yet been shipped seems incredible. The September 9 launch date was announced on August 9. You would expect that by now Russian companies would know exactly how long it takes to get a rocket to the launchpad. This suggests another more fundamental problem with the rocket that they are not revealing.

I know I am being a bit harsh on the Russians here. A more positive spin (which also might be true) might be that they are finally getting a handle on their quality control issues, and the result is these few additional delays as they clean things up.

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3D printing and how it will change what things look like

9:29 pm

Link here. The article not only outlines some of the newer developments in 3D printing, it gives a nice look at how that technology is literally going to change what the things it builds look like.

Simple shapes are popular in human designs because they’re easy. Easy to design, especially with CAD, and easy to manufacture in a world where manufacturing means taking a big block or sheet of something, and machining a shape out of it, or pouring metals into a mold.

But manufacturing is starting to undergo a revolutionary change as 3D printing moves toward commercially competitive speeds and costs. And where traditional manufacturing incentivizes the simplest shapes, additive manufacturing is at its fastest and cheapest when you use the least possible material for the job. That’s a really difficult way for a human to design – but fairly easy, as it turns out, for a computer. And super easy for a giant network of computers.

The result: a stronger object, less weight, and less cost.

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The gentle storms of Saturn

10:03 am

Saturn's gentle storms

Cool image time! The Cassini image above, cropped and reduced slightly, shows a close-up view of Saturn’s cloud tops, taken during Cassini’s May 18, 2017 fly-by.

Clouds on Saturn take on the appearance of strokes from a cosmic brush thanks to the wavy way that fluids interact in Saturn’s atmosphere. Neighboring bands of clouds move at different speeds and directions depending on their latitudes. This generates turbulence where bands meet and leads to the wavy structure along the interfaces.

What I see is a much less turbulent storm pattern, when compared with Jupiter. This is not to say that the weather of Saturn is quiet or peaceful, for it certainly cannot be, considering the gas giant’s size and the depth of the atmosphere. Still, this image suggests that the turbulence is less violent here, possibly because Saturn is farther from the Sun and is hit with less solar energy, and because Saturn is smaller and thus produces less of its own internal energy.

Either way, it is beautiful and mysterious, in the way are all such images of alien places.

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Rocket Lab looks to second test flight of Electron

9:23 am

Capitalism in space: Having completed its review of its first May test flight of its Electron rocket, Rocket Lab now looks to the second test flight.

The article gives a good overview of the results from the first test flight. It also has this tidbit:

The second of Rocket Lab’s three planned test flights is scheduled later this year. If that launch goes well, the company will likely delete the third demonstration mission, and the first commercial Electron flight could be ready for takeoff by the end of December, Beck said last week.

“We’ve got the next test flight rolling out out to the pad in about eight weeks’ time,” Beck said. “If it’s a really good clean flight, we’ll probably accelerate into commercial operations.”

If they follow this schedule, then the next flight will be in mid-October, and the Moon Express launch of its lunar rover will occur in mid-December, just in time to win the Google Lunar X-Prize.

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SpaceX launch today

9:14 am

SpaceX is scheduled to resume launches at Kennedy, after a month of range upgrades by the Air Force. You can watch it live here, or here.

Launch is presently scheduled for 12:31 Eastern time to send a Dragon capsule to ISS. At the moment all looks good for an on-time launch.

The launch was a complete success, including a picture-perfect first stage landing at Kennedy.

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Amazon refunding customers who bought fake eclipse glasses

9:43 am

Amazon is issuing refunds to any customers who bought fake eclipse glasses through the site.

It is essential for people who are going to view the eclipse to understand that as long as the Sun is even partially visible, even by a sliver, it can cause significant eye damage if viewed without proper protection. Make sure your eclipse glasses or filters are safe! And remember, only during the short 2 minute or so totality that will occur in the narrow strip across the country will it be safe to look at the Sun without protection. Even so, you must do so with great caution so that you don’t mistakenly view the Sun unprotected when it is partially exposed.

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New Japanese private joint venture to enter smallsat rocket industry

9:35 am

Capitalism in space: A Japanese private joint venture has formed with the intent to compete in the new smallsat rocket industry.

The new company is led by President Shinichiro Ota, a former industry ministry bureaucrat and once the head of the Japan Patent Office. NGSRDP will initially be based at Canon Electronics’ headquarters, studying technologies and costs with the hope of starting commercial operations as early as this year.

The joint venture has set a price point of 1 billion yen ($9.1 million) or less per launch — an amount seen as competitive against overseas rivals. At present, plans call for a rocket smaller than the Epsilon rocket currently under development by the Japan Aerospace Exploration Agency, or JAXA, but larger than JAXA’s SS-520 minirocket.

The four companies had been discussing formation of a small rocket company for about three years. President Ota has said that the “time is ripe” for the joint venture. IHI Aerospace has played a key role in the development of Epsilon, while Canon Electronics has been involved in the SS-520 project.

I would say that this is a clear sign that the competition in the smallsat rocket industry is definitely heating up.

Note that the name of this new joint venture, New Generation Small Rocket Development Planning (NGSRDP), is quite horrible. I hope they come up with something better soon for marketing purposes.

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