Tag: engineering

NASA suggests retirement of SLS when BFR and New Glenn fly

9:34 am

Capitalism in space: During an interview at a November 1st conference, a NASA official mentioned that if SpaceX’s Big Falcon Rocket (BFR) and Blue Origin’s New Glenn begin flying successfully the agency will seriously consider retiring SLS.

“I think our view is that if those commercial capabilities come online, we will eventually retire the government system, and just move to a buying launch capacity on those [rockets],” Stephen Jurczyk, NASA’s associate administrator, told Business Insider at The Economist Space Summit on November 1.

However, NASA may soon find itself in a strange position, since the two private launch systems may beat SLS back to the moon – and one might be the first to send people to Mars.

I have been saying that this should happen since almost the first day this website was started in 2011. To quote from a September 14, 2011 post:

To be really blunt, this new rocket, like all its predecessors, will never fly either. It costs too much, will take too long to build, and will certainly be canceled by a future administration before it is finished. It is therefore a complete waste of money, and any Congress that approves it will demonstrate how utterly insincere they are about controlling spending.

It appears that I was wrong with this prediction on one count. SLS might actually fly a few times, but only to allow its supporters in Congress and NASA to justify that support. When the private rockets come on line in the early 2020s, cheaper, faster, and better designed (with re-usability), NASA and Congress will then finally say that these rockets are better and that SLS will die, and they will also both make believe they were saying that from the very beginning.

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Antares rocket launches Cygnus freighter to ISS

10:46 pm

Capitalism in space: Northrop Grumman’s Antares rocket today successfully launched its Cygnus freighter to ISS.

This was only the second launch this year by the division of Northrop Grumman that used to be Orbital ATK. They have been trying to launch a research satellite using their Pegasus rocket, but have had engineering issues that keep delaying it.

The leaders in the 2018 launch race remain unchanged:

31 China
18 SpaceX
11 Russia
8 ULA
8 Europe (Arianespace)

China continues to lead the U.S. in the national rankings, 31 to 30. The U.S. total now exceeds last year, and is the most this century. We have now had 91 launches this year, the most since 2014. I expect that number to go up significantly, with a real chance it will pass 100 launches for the first time since 1990, just prior to the fall of the Soviet Union.

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Soyuz rocket successfully launches Progress freighter

5:41 pm

A Russian Soyuz rocket today successfully launched a Progress freighter to ISS.

While Russia has already successfully launched three Soyuz rockets since the manned Soyuz launch abort on October 11, this was the first to use the same exact variation of the Soyuz rocket. It is expected they will now approve the manned December 3rd manned launch to ISS.

The leaders in the 2018 launch race:

31 China
18 SpaceX
11 Russia
8 ULA
8 Europe (Arianespace)

China continues to lead the U.S. in the national rankings, 31 to 29.

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The fractured floor of Komarov Crater

10:35 am

Fractured floor of Komarov Crater

Cool image time! The Lunar Reconnaissance Orbiter (LRO) oblique image on the right, reduced significantly from the original to post here, shows the deeply fractured floor of Komarov Crater on the Moon’s far side. As noted at the image link,

The spectacular fractures that cut across the floor of Komarov crater [about 85 kilometers or 50 miles diameter] were formed when magma rose from the mantle, uplifting and fracturing the crater in the process. In this case the magma did not erupt to the surface, thus the fractures remain visible.

The Komarov fractures are quite large, the major left-to-right fracture that cuts across the center of the scene is over 500 meters deep [1,600 feet] and 2500 meters wide [1.5 miles]. When did they form? The large number of craters superimposed on the floor and fractures testifies to their ancient ages. Likely they are of the same vintage (>2.6 billion years) as the Mare Moscoviense lava plains just to the north

An overview of Komarov Crater as well as other LRO images of it can be found here.

The question that comes to my mind is the relative rarity of craters with such large fractures on their floors. I have noted this for Mars as well. It is expected that there is melt on the floor of all large impact craters. Why do a few produce such pronounced fractures, while most do not? This website posits one explanation, but its complexity leaves me unsatisfied. It also doesn’t explain why it happens only rarely.

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FCC approves four proposed satellite constellations, including SpaceX’s of 7,500+

9:40 am

Capitalism in space: The FCC has approved licenses to launch four different proposed smallsat satellite constellations, totaling almost 8,000 satellites.

Of that total, more than 7,500 would belong to SpaceX’s proposed Starlink constellation.

The new regulatory approvals set the stage for two companies, SpaceX of Hawthorne, California, and Telesat of Ottawa, Canada, to expand constellations already approved last year with more satellites in the rarely used V-band spectrum. Canadian startup Kepler Communications and LeoSat, a company licensed from the Netherlands, also received approvals, Kepler for 140 Ku-band satellites and LeoSat for 78 Ka-band satellites.

Of the four, SpaceX is by far the largest with 7,518 satellites constituting what it calls a “very low Earth orbit,” or VLEO constellation that would operate slightly below 350-kilometers. At that altitude, SpaceX says atmospheric drag would pull spent satellites down in one month, assuaging concerns about the magnitude of debris that that many satellites could create in higher orbits.

While SpaceX likely plans to launch its satellites on its own rockets, the other companies will likely depend on the new smallsat rocket companies — Rocket Lab, Virgin Orbit, Vector — that are about to all come on line.

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Escape velocity on Phobos changes a lot depending on location

9:34 am

A new computer analysis of the shape of the gravitational field of the Martian moon Phobos suggests that the escape velocity varies significantly, depending on where you are on the moon’s surface.

Phobos is an odd duck among our solar system’s moons. It’s tiny (a fraction of a percent the size of our own moon) and is shaped like a potato; that weird shape draws gravity to different places, depending on where you are.

All these features make Phobos a challenge to travel on, researchers report in Advances in Space Research. In some places, moving any faster than 5 kilometers per hour would be enough to free you from the moon’s meager gravitational pull, sending you off into space where you’d likely be captured by Mars’s gravity and end up orbiting the Red Planet. The fastest you could travel anywhere on Phobos would be about 36 kilometers per hour, or a little faster than a golf cart, the team finds.

Obviously, this must be recognized for any mission trying to land and explore the moon.

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Rocket Lab raises an additional $140 million

9:29 am

Capitalism in space: Rocket Lab has raised an additional $140 million in investment capital following its successful first operational launch last week.

The company announced Nov. 15 that it closed a Series E funding round, led by existing investor Future Fund, an Australian sovereign wealth fund. Several other existing investors also joined the round, including Greenspring Associates, Khosla Ventures, Bessemer Venture Partners, DCVC (Data Collective), Promus Ventures and K1W1. One new investor, Accident Compensation Corporation of New Zealand, joined the round.

The Series E round comes after the company raised $75 million in a Series D round in March 2017. The company has now raised more than $288 million to date. Rocket Lab did not disclose the valuation of the latest round, but said it exceeded the “$1-billion-plus” valuation from its Series D round.

In the race to grab the smallsat market, Rocket Lab is far ahead of its nearest competitors, Virgin Orbit and Vector. If I had to rank them at this moment, I would say that Virgin Orbit is second with Vector third.

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SpaceX successfully launches Qatar communications satellite

3:19 pm

Capitalism in space: SpaceX today successfully launched a communications satellite for Qatar.

The first stage, previously flown in July, successfully landed on their drone ship. They intend to fly it for an unprecedented third time in the very near future. With this launch SpaceX has tied its record for most launches in a year, 18, which is also the most ever in a single year by a private company.

The leaders in the 2018 launch race:

31 China
18 SpaceX
10 Russia
8 ULA
8 Europe (Arianespace)

China continues to lead the U.S. in the national rankings, 31 to 29.

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India to attempt four more launches in 2018

8:50 am

The new colonial movement: In outlining the success of yesterday’s GSLV launch, the head of India’s space agency noted that they will attempt to complete four more launches before the end of the year.

Following the missions, Mr Sivan said, in January next, ISRO would launch the Chandrayaan-II mission (lunar lander) which will be the first operational mission of the GSLV-Mk III-vehicle.

Addressing reporters after the successful launch of the second developmental flight GSLV-MkIII-D2 carrying communication satellite GSAT-29, he said, “we have to achieve 10 missions before January.”

“That is six satellite missions as well as four launch vehicle missions. Definitely, the task in front of us is very huge,” he said.

According to him, after Wednesday’s flight, the heaviest launcher of India has completed its development flights and is entering into the operational group of launchers of ISRO, that is along with the PSLV (polar satellite launch vehicle) and GSLV.

Four launches in six weeks would require a launch every week and a half. IF ISRO can do this, they will demonstrate the ability to launch almost weekly, a capability that would place them close to becoming a world power in space.

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Null result from Spitzer suggests Oumuamua was small

1:43 pm

The uncertainty of science: The inability of the infrared Spitzer Space Telescope to detect the interstellar object Oumuamua as it exited the solar system suggests the object is small.

The fact that ‘Oumuamua was too faint for Spitzer to detect sets a limit on the object’s total surface area. However, since the non-detection can’t be used to infer shape, the size limits are presented as what ‘Oumuamua’s diameter would be if it were spherical. Using three separate models that make slightly different assumptions about the object’s composition, Spitzer’s non-detection limited ‘Oumuamua’s “spherical diameter” to 1,440 feet (440 meters), 460 feet (140 meters) or perhaps as little as 320 feet (100 meters). The wide range of results stems from the assumptions about ‘Oumuamua’s composition, which influences how visible (or faint) it would appear to Spitzer were it a particular size.

The new study also suggests that ‘Oumuamua may be up to 10 times more reflective than the comets that reside in our solar system – a surprising result, according to the paper’s authors.

These results fit the models that explain Oumuamua’s fluctuations in speed as caused by the out gassing of material, like a comet. They also do not contradict the recent hypothesis that the object might have been an alien-built light sail.

The simple fact is that we do not have enough data to confirm any of these theories.

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Volcanic rivers on Mars

12:53 pm

Granicus Valles

Cool image time! The photo on the right, cropped and reduced to post here, was part of the November image release from the high resolution camera on Mars Reconnaissance Orbiter (MRO). If you click on the image you can see the full resolution picture.

The uncaptioned release webpage is dubbed “Faults in Granicus Valles.” The image itself only shows a small part of Granicus Valles, named after a river in Turkey, that flows down from the estern slopes of the giant volcano Elysium Mons. While far smaller than the four big Martian volcanoes in the Tharsis region to the east and near Marines Valles (which I highlight often), Elysium Mons still outshines anything on Earth at a height of almost 30,000 feet and a width of 150 miles. It sits at about the same northern latitude of Olympus Mons, but all by itself, rising up at the very northern edge of the transition zone between the southern highlands and the northern plains, with the vast Utopia Basin, the second deepest basin on Mars, to the west.

Overview of Elysium Mons and Granicus Valles

Granicus Valles itself is almost five hundred miles long. At its beginning it flows in a single straight fault, but once it enters the northern plains of Utopia Basin it begins to meander and break up into multiple tributaries. The MRO image above shows only a tiny portion in the northern plains, as illustrated by the white box in the overview map to the left.
» Read more

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Powerful 1972 solar storm detonated ocean mines in Vietnam

10:12 am

Scientists studying a powerful 1972 storm have also uncovered a recently released Navy report that showed the storm was powerful enough that it detonated ocean mines off the coast of Vietnam.

On the same day [the storm arrived on Earth], while observing the coastal waters of North Vietnam from aircraft, US Navy personnel witnessed dozens of destructor sea mines exploding with no obvious cause. These mines were airdropped by the US Navy into Vietnamese waters as part of Operation Pocket Money, a mission aimed at blocking supplies from reaching North Vietnamese ports.

The Navy promptly investigated the peculiar explosions, working with the National Academy of Sciences and the National Oceanic and Atmospheric Administration, to conclude that more than 4,000 mine detonations were most likely triggered by the solar storm, Knipp said.

A now declassified report about the mining of North Vietnam from the Chief of Naval Operations at the Mine Warfare Project Office noted, “this was the first example of what happens to a major mining campaign in the face of the vagaries of nature.”

Many of the destructor mines were designed to trigger if they sensed changes in magnetic fields associated with moving ships. Solar activity is known to perturb Earth’s magnetic field, and in early August 1972, the perturbations were likely strong enough to meet the magnetic requirements for detonation, Knipp said.

This proves once again that one must not dismiss any possibility in trying to understand what happens in the universe. Don’t be credulous, but don’t be close-minded either. The universe can surprise you.

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Virgin Orbit completes fastest taxi test of LaunchOne

9:44 am

Capitalism in space: Virgin Orbit this past weekend completed the fastest taxi test of its LaunchOne smallsat rocket airplane, with LaunchOne attached.

In a tweet posted today, Virgin Orbit said the Nov. 11 ground test revved up the plane, nicknamed Cosmic Girl, to a speed beyond 110 knots (125 mph) on a runway in Victorville, Calif. That’s fast enough to simulate an aborted takeoff. “We also used the day as an opportunity to load real flight software onto LauncherOne for the first time,” the company said.

My 2016 prediction, that Virgin Orbit’s LauncherOne will reach space before Virgin Galactic’s SpaceShipTwo, looks increasingly likely. They had said they wanted to do their first launch by the end of the 2018 summer. Though this did not happen, their launch license [pdf] is effective through December 2019, and it appears they are moving towards that first launch within a few months.

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Vector applies for license for launch in Kodiak, Alaska

9:35 am

Capitalism in space: Vector has applied for an FAA license for a suborbital test launch in Kodiak, Alaska of its Vector-R smallsat rocket.

The launch is planned to occur no later than April 2019.

Their original suborbital test schedule was supposed to have occurred already, but those were mere verbal announcements. This is more concrete.

Vector does need to get off the ground however. Two years ago it was considered in a close race with Rocket Lab. Now Rocket Lab has pulled far ahead, and Vector might be losing ground to other smallsat launch companies.

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India’s GSLV-Mark 3 rocket successfully launches communications satellite

9:15 am

The new colonial movement: India today successfully launched a new Indian communications satellite on the third launch of its larger GSLV-Mark 3 rocket.

The Geosynchronous Satellite Launch Vehicle Mk.III, or GSLV Mk.III, is India’s newest and most powerful rocket. After making a suborbital demonstration launch in late 2014, the rocket made its first orbital mission last June when it deployed the GSAT-19 spacecraft.

Wednesday’s launch was designated D2, indicating that it was the rocket’s second developmental launch, however like last year’s flight its payload – GSAT-29 – is a fully operational satellite.

I have embedded a video of the launch below the fold. The launch occurs at about 25 minutes in.

With this success, the fifth launch this year by India, that country will be able to move forward on the January launch by the GSLV of its Chandrayaan-2 lunar mission.

The leaders in the 2018 launch race remains unchanged:

31 China
17 SpaceX
10 Russia
8 ULA
8 Europe (Arianespace)

China continues to lead the U.S. in the national rankings, 31 to 28.
» Read more

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Another private lunar rover unveiled

3:19 pm

Capitalism in space: The private start-up company Lunar Outpost today unveiled its tiny 10 kilogram (22 pound) rover, designed to map lunar resources.

The first Prospector was demonstrated driving and drilling in Lunar regolith simulant at the Colorado School of Mines’ new Lunar testbed facility in the Earth Mechanics Institute overseen by the Center for Space Resources. This event marks the first commercial Lunar Prospector publicly tested in the United States.

Evidence of valuable resources on the Lunar surface, such as water, precious metals, and helium-3 have been established by remote sensing on flyby missions around the Moon. This scientific data has been used to create general resource models of the Lunar surface, which now require ground-truthing to establish optimal landing sites and plan future resource extraction operations. Groups of Lunar Outpost Prospectors will map the surface and subsurface resources of the Moon, while autonomously navigating along waypoints and avoiding hazards such as large rocks and craters. These Prospectors can also be teleoperated if needed and can utilize NASA’s Lunar Orbital Platform-Gateway concept as a center of operations.

This is a tiny inexpensive rover, essentially an upgraded drone. Very smart, and efficent. Below the fold is the company’s video of this demo test. The drilling capability is especially impressive.

Their website does not say how much they will charge for this rover, but they also note that it has 5 kilograms of cargo capacity, meaning that they can also offer this to customers.
» Read more

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LSST’s giant coating chamber arrives in Chile

2:54 pm

The giant coating chamber that will be used to coat the mirrors for the Large Synoptic Survey Telescope has arrived in Chile.

The Coating Chamber and its associated equipment will share this level with the camera maintenance rooms, the vertical platform lift, and the shipping and receiving area. The Coating Chamber will be used to coat LSST’s mirrors when they arrive on Cerro Pachón, and to re-coat the mirrors periodically during Operations.

LSST will conduct a 10-year survey, and during this period its mirrors will be exposed to the elements each night as the telescope surveys the sky through the open side of the observatory dome. Over time the mirrors will get dusty, and the mirror coatings may develop small blemishes that eventually affect the telescope’s performance. To ensure that LSST continues to collect the sharpest possible images of the night sky, its mirrors will undergo periodic washing and recoating. It’s anticipated that the Primary/Tertiary Mirror (M1M3) will need to be recoated every two years, and the Secondary Mirror (M2) every five years, during the 10-year survey. Both the washing and recoating will be done inside the observatory; special equipment will be used to remove and transport the mirrors from the telescope to the washing station and coating chamber.

LSST will essentially be imaging the entire visible sky nightly, making it possible over time to track sudden events, such as supernovae, as they happen.

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Evidence of nitrogen ice glaciers on Pluto

2:49 pm

Using data sent back by New Horizons during its fly-by of Pluto scientists now think they have identified land forms created by past nitrogen ice glaciers.

The washboard and fluted terrain … occur at the location on Sputnik Planitia’s perimeter where elevations and slopes leading into the surrounding uplands are lowest, and also where a major tectonic system coincides with the edge of Sputnik Planitia. The low elevation of the area makes it a natural setting for past coverage by nitrogen ice glaciers, as indicated by modeling of volatile behavior on Pluto performed by Dr. Bertrand at Ames.

Through comparison of the washboard and fluted texture with parallel chains of elongated sublimation pits (depressions in the surface formed where ice turns directly into a gas) seen in southern Sputnik Planitia, the ridges are interpreted to represent water ice debris liberated by tectonism of underlying crust. This water ice debris was buoyant in the denser, pitted glacial nitrogen ice that is interpreted to have formerly covered this area, and collected on the floors of the elongated pits. After the nitrogen ice receded via sublimation, the debris was left as the aligned ridges, mimicking the sublimation texture – washboard ridges where deposited on flat terrain, and fluted ridges where deposited on steeper slopes.

This is strange stuff. The solid bedrock here, water ice, will float on the nitrogen ice sitting on top of it. Thus, the material that wants to sublimate away, nitrogen, sometimes has to fight its way past the water ice that has risen to the top of the pile.

To put it mildly, we hardly understand these alien processes. This research is merely a first stab, the first hand-waving.

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