Tag: spaceflight

Rosetta team adopts new approach strategy

9:12 am

Because of the problems Rosetta experienced during its last close fly-by of Comet 67P/C-G the engineering team has worked out a new approach strategy for future observations.

Essentially, they are postponing any close fly-bys for the near future. Instead, they will observe from farther away, while reassessing the situation and planing for later opportunities.

Meanwhile, on April 12 the next opportunity to listen for Philae begins.

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Cubesat satellite industry booming

9:03 am

The competition heats up: In 2014 more cubesats were launched than during the industry’s first ten years.

Without doubt the concept of cubesats is now taking the satellite industry by storm, mainly because of the advent of new electronic miniaturization. However, the most fascination part of this story was how the concept was born:

In 1999, Puig-Suari met with Bob Twiggs, at the time an aerospace engineer at Stanford University, to discuss ways of getting more student projects into space. “We had to do something to get more opportunities to launch these things,” recalls Twiggs, now at Morehead State University in Kentucky. They focused on slimming down the spacecraft, because weight drives up the cost of reaching orbit.

Over lunch at a sandwich shop in San Luis Obispo, Twiggs and Puig-Suari sketched out options on a napkin. They thought hard about the potential capabilities of a 10-centimeter cube with a mass limit of 1 kilogram—the size and weight of a liter of water. Clad in solar cells, the cube would eke out perhaps a watt of power, enough to power a small computer and a radio: “a Sputnik,” Puig-Suari says. Back at Stanford, Twiggs found the perfect life-size demonstration model: a plastic box used for storing the insanely popular stuffed animals known as Beanie Babies. A standard was born.

Read the whole thing. The low cost of these tiny satellites is about to revolutionize the entire unmanned space industry.

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SpaceX to try a first stage recovery again on April 13

8:52 am

The competition heats up: In its next launch on Monday, SpaceX will once again try to safely land its first stage on an ocean barge, allowing it to reuse that stage on later flights.

Monday afternoon is certainly going to be an exciting day for space cadets. First, at 4 pm (Eastern) the head of ULA will reveal the design of that company’s new rocket. Then, at 4:33 pm (Eastern), SpaceX will launch Dragon to ISS while attempting to return the first stage safely.

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Airbus Safran demands full ownership of Ariane 6

5:15 pm

The competition heats up: One of the heads of Airbus Safran that is offering to build Europe’s next rocket, Ariane 6, has said that they must have full control of the rocket and project or they won’t do it.

“We are now a few weeks from the submission of a bid, and of course at this stage everyone defends his camp,” Lahoud said. “It is said that industry needs to make a financial contribution. We have said it’s possible we will contribute, but on condition that [development] not be conducted under the former system.

“We want responsibility for the design, the production, the commercialization and operations to be in the hands of industry, and not in a sort of mixed-economy creation that borrows more from the United Nations than from what our competitors do. Under these circumstances, and only under these circumstances, will there be a business case that allows us to invest, and to defend before our boards of directors the fact that corporate cash needs to be spent.”

In other words, they will not build something that will be under the complex bureaucratic control of the many-headed European Space Agency. Under that framework, they don’t think they can compete, so why bother?

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Destroy a building rather than let a charter school use it

11:52 am

A Michigan school district, strapped for cash, preferred demolishing an empty school building rather than sell it to a private charter school for several million.

The district eventually backed down to public pressure and made the sale, but this story is very instructive. You have to watch the video report at the link to find out who really led the opposition to this sale, and why. I wonder if you can guess.

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NASA to use giant SLS rocket to launch cubesats

9:50 am

The giant SLS rocket that NASA is building for billions will be used to launch eleven tiny 30 pound cubesats into deep space.

With room for 11 small shoebox-sized CubeSats on the first test flight of NASA’s behemoth Space Launch System, agency officials have turned to scientists, industry and students to fill the slots in time for launch in 2018. NASA has selected three CubeSats developed by internal government teams for flight on the SLS demonstration launch, and officials announced last week two more top candidates that could be manifested on the mission.

These will be the first cubesats ever sent beyond Earth orbit. Using SLS to get them into space, however, is very incongruous, since the very concept of cubesats is small and cheap, while SLS is everything but.

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ULA to trim working launchpads from 5 to 2

9:37 am

The competition heats up: In order to lower its fixed costs, ULA plans to reduce the number of launchpads it maintains from 5 to 2, one at Kennedy and Vandenberg respectively.

Right now they need to maintain three separate launchpads to operate the Delta 2, Delta 4, and Delta Heavy, which is the main reason the Delta family of rockets is so expensive. This is also the reason that the Delta 2 and Delta Heavy only launch from Vandenberg, as ULA has retired their launchpads at Kennedy.

It appears that ULA’s plan is to design their next generation rocket much like SpaceX’s Falcon 9, with as simple as system of launch facilities as possible.

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The hidden glaciers of Mars

8:22 am

The glaciers belts of Mars

Scientists, using computer models and radar data obtained in orbit, have detected large belts of glaciers in Mars’ upper middle latitudes, buried beneath a layer of dust.

Several satellites orbit Mars and on satellite images, researchers have been able to observe the shape of glaciers just below the surface. For a long time scientists did not know if the ice was made of frozen water (H2O) or of carbon dioxide (CO2) or whether it was mud.

Using radar measurements from the NASA satellite, Mars Reconnaissance Orbiter, researchers have been able to determine that is water ice. But how thick was the ice and do they resemble glaciers on Earth? A group of researchers at the Niels Bohr Institute have now calculated this using radar observations combined with ice flow modelling.

The press release has one typo that is important. The belts appear to be located between 30-50 degrees latitude, not 300-500 (the degree sign became a 0 by mistake).

It is important to recognize the uncertainty of this discovery. Orbital images have seen features that suggest glaciers. The evidence that it is water-ice and that the water-ice is still largely present comes from the computer models. Computer models are notorious for seeing things that end up not being there.

Nonetheless, this result is important. It is further strong evidence that Mars still contains a lot of water locked in its immediate subsurface, where future colonists can mine it and use it to survive and build their homes.

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3D printed items made in space come back to Earth

11:00 pm

NASA today released a video of engineers unpacking a box of 3D parts that had been printed on ISS and then returned to Earth for testing.

Some more details here.

The goal, Bean continued, is for NASA to develop a database of mechanical properties to see if there’s any difference in mechanical strength between identical items made in space and on Earth. During the interview last month, Bean said that while NASA didn’t yet have any hard data, there had been initial indications from videos made on the space station, that the plastics used in the 3D printing there had “adhered differently” than those in the terrestrial test. “The astronauts trying to get the parts off the plate,” Bean said, found that the plastic “seemed to be a little more stuck than on the ground.” He said that while it was too early to tell if that was actually true, his guess was that if so, “it may be due to a lack of convection in zero-gravity.”

Understanding the engineering issues of 3D printing in space will make it possible for crews to carry far less cargo on long interplanetary journeys. Instead, they would carry a much smaller amount of raw material, which they could use to manufacture items as needed, then recycled.

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Congress moves to require NOAA to use private weather satellites

4:31 pm

The competition heats up: The House Science Committee has approved a bill that would require NOAA to begin using private satellites to gather weather data.

NOAA officials, most recently at a Feb. 12 hearing of the House Science environment subcommittee, have long said the agency is open to buying space-based weather data from aspiring commercial providers, so long as the companies can certify their data are up to NOAA standards. Currently this is impossible because NOAA has published no standards.

That would change if the Weather Research and Forecast Innovation Act of 2015 (H.R. 1561) becomes law. The measure sets a legal timetable for NOAA to publish the standards and competitively select at least one provider to sell the agency data to determine whether it can be easily folded into the National Weather Service’s forecasting models.

Watch what they do, not what they say. NOAA might claim it would use private providers, but without providing those standards it has given itself an easy way to reject everyone, which is exactly what they have done for years. This bill would force the issue.

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Blue Origin to begin flight tests of new rocket engine

4:22 pm

The competition heats up: The rocket engine that Jeff Bezos’ Blue Origin company has been building is now ready for suborbital flight tests.

Blue Origin says the BE-3 is the first new hydrogen-fueled engine to be developed in the United States in more than a decade. It can be continuously throttled between 20,000 and 110,000 pounds of thrust. “Liquid hydrogen is challenging, deep throttling is challenging, and reusability is challenging,” Bezos said. “This engine has all three. The rewards are highest performance, vertical landing even with a single-engine vehicle, and low cost. And as a future upper-stage engine, hydrogen greatly increases payload capabilities.”

They hope to begin flight tests by the end of the year. Even as they develop this suborbital hydrogen engine, they are also developing an bigger engine for orbital flights in ULA’S next generation rocket that will replace the Atlas 5 and Delta.

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Build a satellite of your own for less than $30K

8:37 am

The competition heats up: An industry of new cubesat builders can now build satellites for anyone for any reason for very little money.

The miniaturisation of technology allows people to do more with less hardware, said Chad Anderson, the managing director of Space Angels Network, an investment house specialising in the space industry. That industry, he said, was worth $300bn (£200bn) last year. Constellations of smaller satellites, like those suggested as tracking devices for planes over oceans, are now a possibility. “The launch costs are coming down and people leveraging today’s technology are able to do more with less and launch less mass to orbit. The price point has come down to where start-ups and entrepreneurs can really make an impact on the scene for the first time,” he said.

When the first tiny satellite launch companies arrive, expect this industry to blossom at an astonishing rate.

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ESA and Airbus Safran in budget dispute over Ariane 6

4:02 pm

The competition heats up: The deal between ESA and Airbus Safran to build Europe’s next generation rocket, Ariane 6, to compete with SpaceX for the launch market is now threatened because Europe wants the company to pay more for development than the company expected.

[ESA launch director Gaele] Winters acknowledged that Airbus Safran Launchers has not agreed with ESA’s assessment that industry’s share of the development cost is around 400 million euros. “They told us they have not signed off on the 400 million [euros], and this is correct,” Winters said. “It is an assumption we made, which we will look at next during the full Program Implementation review scheduled for mid-2016. Industry is prepared to invest in the program, and one important condition is that we need to be sure they have a fair rate of return on their investment.”

Winters said ESA is sensitive to the fact that additional costs borne by industry will find their way into the Ariane 6 pricing structure, which would undermine the vehicle’s competitiveness on the international commercial market.

If Airbus Safran wants to own the rocket, they must be willing to pay for some of its development, as have SpaceX and the other new American commercial space companies. This is the price for having the right to make money from the rocket outside of its European government customers. It seems, however, that Airbus Safran is balking at that reality. They are used to having everything covered by ESA, and are now unhappy they might have to lay out some bucks themselves.

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The GAO discovers another out-of-control NASA project

6:56 pm

Government marches on! A new GAO report has found that NASA’s effort to upgrade the ground-based portion of its satellite communications system, used by both military satellites and manned spacecraft, is more than 30 percent over budget, with its completion now delayed two years to 2019.

Worse, the GAO found that this problem program was actually one of three that have had budget problems. And that doesn’t include the disastrously overbudget James Webb Space Telescope.

In its latest assessment of NASA’s biggest programs, the U.S. Government Accountability Office identified the Space Network Ground Segment Sustainment (SGSS) as one of three — not counting the notoriously overbudget James Webb Space Telescope — that account for most of the projected cumulative cost growth this year. The others are the Magnetospheric Multiscale Mission, which launched March 12, and the Ice, Cloud, and Land Elevation Satellite-2, or ICESat-2, mission, the congressional watchdog agency said.

The last two projects are part of the climate focus that Obama imposed on NASA.

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Dawn’s chief engineer gives us a detailed update

9:00 am

Link here. Chief engineer Marc Rayman loves to write about Dawn, and his posts on the Dawn blog are probably the most information-packed of any spacecraft blog I have ever read. Key quote this time:

Dawn’s extensive photographic coverage of the sunlit terrain in early May will include these bright spots. They will not be in view, however, when Dawn spies the thin crescent of Ceres in its next optical navigation session, scheduled for April 10.

The orientation of the spacecraft and asteroid now are such that there is no point taking pictures, as most of the asteroid is in darkness.

Read it all, however. He gives a masterful overview of what is going to happen in the coming months.

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Problems for Rosetta during its most recent fly-by of Comet 67P/C-G

8:52 am

During its most recent close fly-by of Comet 67P/C-G Rosetta had a number of issues that caused the spacecraft to go into safe mode.

During the most recent flyby, a number of issues were reported, starting with the primary star tracker encountering difficulties in locking on to stars on the way in towards closest approach. Attempts were made to regain tracking capabilities, but there was too much background noise due to activity close to the comet nucleus: hundreds of ‘false stars’ [from comet debris] were registered and it took almost 24 hours before tracking was properly re-established.

In the meantime, a spacecraft attitude error had built up, resulting in the high gain antenna off-pointing from the Earth. Indeed, a significant drop in the radio signal received by ground stations on Earth was registered. Following recovery of the star tracker system, the off-pointing was immediately automatically corrected and the operations team subsequently saw a return to a full strength signal from the spacecraft.

However, issues with false stars were still occurring. Cross comparisons with other navigation mechanisms showed inconsistencies with the star trackers and some on board reconfigurations occurred. While attempting to reconfigure those, the same error occurred again leading this time to an automatic safe mode on Sunday afternoon. Safe modes occur when certain spacecraft parameters fall out of their normal operating ranges and the spacecraft automatically takes measures to preserve its safety. This also includes switching off the science instruments to protect them.

Rosetta is operating nominally now, but these issues are going to get more serious in the coming months, as the comet gets more active. Rosetta’s engineering team is going to have to come up with a method for the spacecraft’s star trackers to distinguish between stars and the debris in the comet’s coma. If they don’t it is likely that they will have to reduce the close fly-bys significantly.

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Russian government takes over Vostochny construction

8:38 am

The Russian government has once again increased its supervision of the construction of the Vostochny spaceport, now 120 days behind schedule.

They want to launch the first rocket from the spaceport by December of this year. The story also describes how contractors have been ordered, by Russia’s deputy prime minister himself, to stop leaving delicate new equipment in unprotected environments, as the equipment has been delivered before the buildings they are supposed be stored in have been finished.

Where the equipment will be put is not said. The boss has ordered it, however, so it better happen!

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Opportunity enters Marathon Valley

3:19 pm

Opportunity at the mouth of Marathon Valley

For the John Batchelor Show tonight John and I taped this afternoon a two-segment interview with geologist Bill Farrand, who is part of the science team for Opportunity. The image above shows Opportunity’s recent travels as well as its next target. (Click on the image for the full resolution image.) Assuming the rover’s memory problems don’t get worse and Congress decides to reverse the decision of the Obama administration to end all funding for Opportunity, the scientists hope to take the rover east into Marathon Valley, a very distinct break in the rim of Endeavour Crater.

Whether they will continue east into the crater itself Bill could not say. Some scientists have been pushing for that eventual goal, while others would prefer to do more research along the rim.

What is interesting about Marathon Valley is that it takes the rover deep into the crater’s rim. Previously Opportunity has been limited to exploring the rim’s outer edges, since the rim itself is generally too rugged for the rover to traverse.

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China’s first reusable shuttle?

9:32 am

On Monday China launched the first of a new generation of GPS satellites using a secretive new upper stage they call Yuanzheng-1 (“Expedition-1” in English).

The first article describes Yuanzheng-1 as follows:

The Yuanzheng-1 (“Expedition-1″) uses a small thrust 6.5 kN engine burning UDMH/N2O4 with specific impulse at 3092 m/s. The upper stage should be able to conduct two burns and has a 6.5 hour lifetime. It will be adapted for use on the CZ-3A/B/C series mainly for direct MEO/GEO insertion missions (mostly for the navigation satellites of the Beidou GNSS).

This description make it appear that Yuanzheng-1 is nothing more than a typical upper stage, capable of bringing its cargo to the appropriate orbit.

The second article, however, has a concept picture of Yuanzheng-1, a shuttle-like craft that looks to me to strongly resemble the X-37B. Nothing in the second article however contradicts the first, which leaves us with a mystery. Is this upper stage capable of returning to Earth after it deploys its cargo? The fact that the Chinese were unusually secretive about the launch itself suggests that there was definitely something unusual about the rocket itself.

If the Chinese have made their upper stage reusable they have taken a big step to reducing costs in a way that will allow them to compete with SpaceX, should that company succeed in returning its first stage so that it can be reused.

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Ants in space!

9:08 am

By studying the behavior of eight colonies of ants sent to ISS, scientists have discovered that ants can adapt to weightlessness, though they do not do quite as well as their gravity-bound counterparts.

To start the experiment, a barrier was removed that allowed them to explore a new area. After a few minutes, a second barrier was lifted, expanding the available territory even further. “The idea is to ask the ants to search a small space – and then provide more space and see what will happen when the same number of ants have to use a larger space,” Prof Gordon explained. Equivalent experiments were also run back on Earth, for comparison.

Down on ground level, adding extra space and dropping the “density” of ants caused them to adjust their paths, covering more ground and spreading out much more. In this way, nearly every corner of the container was visited by more than one ant within five minutes. The ants in space still did their best to search, moving out into the expanded area as expected – but they were nowhere near as effective as their counterparts on the ground, which had the luxury of normal gravity.

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X-37B to fly again!

8:18 pm

The May 6 Atlas 5 launch will carry one of the Air Force’s two X-37B mini-shuttles on a new mission in space.

The Air Force won’t yet confirm which of the Boeing-built spaceplanes will be making the voyage. The first craft returned in October from a 675-day mission in space following a 224 day trek in 2010. OTV No. 2 spent 469 days in space in 2011-2012 on its only mission so far. “The program selects the Orbital Test Vehicle for each activity based upon the experiment objectives,” said Capt. Chris Hoyler, an Air Force spokesperson. “Each OTV mission builds upon previous on-orbit demonstrations and expands the test envelope of the vehicle. The test mission furthers the development of the concept of operations for reusable space vehicles.”

There are indications that the Air Force wants to attempt landing the shuttle at Kennedy this time.

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Opportunity has another brief memory loss

8:14 pm

Less than a week after engineers had rebooted the rover’s memory and thus thought they had solved its flash memory problems, Opportunity has had another brief bout of amnesia.

They didn’t loss any data, and the event was much smaller than the problems that had shut down use of the memory banks in December. Nonetheless, they do not know what caused it.

Accumulative problems like this are what will likely end Opportunity’s life. It appears we might be seeing the arrival of old age in the rover.

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NASA denies new space station partnership with Russia

9:12 am

NASA officials today denied they were negotiating a partnership with Russia to build a space station replacement for ISS, as suggested yesterday by the head of Russia’s space program.

I am beginning to suspect that the misunderstanding here comes from NASA head Charles Bolden, who is in Russia right now. Knowing Bolden, who is a nice guy who likes to make others happy, he probably said some nice feel-good, kumbaya things to the Russians during conversations with them, things like “We want to keep working together,” and “We will support your plans for your future space station whole-heartedly.” None of this was meant as a commitment, but the Russians might have taken these statements more seriously than Bolden realized.

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