Tag: engineering

China’s giant single dish radio telescope FAST nears completion

10:19 am

The new colonial movement: The completion of FAST, the world’s largest single dish radio telescope in China, nears completion.

The article over emphasizes one of the telescope’s minor research projects, the search for alien life. However, it also provides a good overview of the telescope’s status. The main dish is finished, and they are presently building the instruments that will use that dish to do astronomical research.

Leave a comment

The confusing Iranian space program

10:06 am

Link here. While written as an op-ed outlining the chaotic state of the Iranian space effort, the article highlights two pieces of interesting information.

First, Iran wants to create its own GPS satellite system, which the article refers to as a “pointing, navigation, and timing” (PNT) system.

Mojtaba Saradeghi, a deputy director of the Iran Space Agency (ISA), recently told Iranian media that the ISA plans to develop an indigenous PNT capability. Saradeghi said that the PNT programme is a long-term one and that the ISA is still figuring out how it will be funded.

This announcement is almost certainly pure bluster, instigated by the agreements signed last week between Israel and India, one of which involved working together to develop their own atomic clocks used in GPS satellites.

Second, Iran has decided that instead of launching an already built smallsat they will put it on display in a museum. The smallsat, Mesbah, was built in partnership with Italy back in the early 2000s but never launched because it was seized by Russia and Italy in 2006 due to international sanctions. Though negotiations are on-going now to get it released with the easing of sanctions, the head of the Iran Space Agency, Mohsen Bahrami, on July 2 still said it was going to be mothballed if they get it back.

This incoherence fits with other recent announcements by Iran. They have repeatedly been promising that a number of satellites will be launched in the coming months, but those launches seem to never happen. In addition, they announced in early June that they were shutting down any further work on a human space mission, citing cost.

I would not be surprised it missile tests continue, however. Iran is a corrupt theocracy and semi-dictatorship, and it is typical of these kinds of top-down governments to focus their effort on military technology.

One comment

China begins 200-day simulated self-sufficient space station experiment

9:32 am

The new colonial movement: Four Chinese students yesterday began a 200 day experiment, living in a simulated ground-based space station that will attempt to be self-sufficient for the entire time.

The underlying but unstated goal is revealed by this quote:

But the 200-day group will also be tested to see how they react to living a for period of time without sunlight. The project’s team declined to elaborate. “We did this experiment with animals… so we want to see how much impact it will have on people,” Liu, the professor, said.

They aren’t just testing the self-sufficiency of a future interplanetary spaceship. They are also testing the self-sufficiency of a lunar base, which must undergo 14 days of darkness each lunar day. I wonder if the facility is also subjected to no sunlight during these tests.

2 comments

Creating space dirt

9:50 am

Space engineers who need to simulate the surface of planets, moons, and asteroids in order to test their rovers, drills, and landers for future missions are demanding better alien dirt.

James Carpenter just needed some fake Moon dirt. Carpenter, a lunar-exploration expert at the European Space Agency (ESA) in Noordwijk, the Netherlands, works on a drill designed to hunt for buried ice on the Moon. His team recently ordered half a tonne of powdery material to replicate the lunar surface from a commercial supplier in the United States. But what showed up was not what the team was expecting. “The physical properties were visibly different,” says Carpenter.

His experience underscores a longstanding problem with artificial space soils, known as simulants: how to make them consistently and reliably. But now there is a fresh effort to bring the field into line. Last month, NASA established a team of scientists from eight of its research centres to analyse the physical properties and availability of existing simulants. And, for the first time, an asteroid-mining company in Florida is making scientifically accurate powders meant to represent the surfaces of four classes of asteroid. It delivered its second batch to NASA on 28 June.

The article is worth reading in its entirety, as it describes an engineering problem that I am sure most space geeks, including myself, never thought even existed.

5 comments

XCOR layoffs due to loss of ULA contract

9:32 am

Capitalism in space: The layoffs at XCOR this week that essentially shut the company down were the due to ULA cancelling its upper stage engine contract with the company.

The primary impetus for the layoffs, Acting CEO and XCOR Board member Michael Blum told me, is the loss of a contract for engine development that the company had with United Launch Alliance. “The proceeds should have been enough to fund the prototype of Lynx [the company’s planned spacecraft], but ULA decided they’re not going to continue funding the contract. So we find ourselves in a difficult financial situation where we need to raise money or find joint developments to continue.” ULA declined to comment.

9 comments

Crab Processing

6:01 pm

An evening pause: It is quite surprising how this process is still almost entirely done by hand.

Hat tip Edward Thelen.

I sure could use more engineering type evening pause suggestions like this. You all like them, so you must know how to find them. If you have a suggestion, let me know in a comment here. Don’t give the link, I will email you for it.

4 comments

China planning its own commercial sea launch platform

10:35 am

The new colonial movement: According to one Chinese official, China is developing its own ocean-going launch platform for placing commercial payloads into orbit.

Tang Yagang, vice head of the aerospace division of the No.1 institute of the China Aerospace Science and Technology Corporation (CASTC), said that the technology is not difficult and a sea launch platform can be built based on modifying 10,000-tonne freighters.

China will use solid carrier rockets which rely less on launch facilities and feature mature technology, Tang said, adding that key technology for the carrier rockets will be tested at sea this year and the service is expected to be available for international users in 2018.

This pronouncement suggests that the platform is already mostly built, and that the first test launches will occur this year.

5 comments

ESA unveils dual orbiter mission to Mercury

10:31 am

After twenty years of development, the European Space Agency this week finally unveiled the completed dual orbiters that it hopes to launch on a seven year journey to Mercury in October 2018.

The 4,100-kilogram BepiColombo consists of two orbiters that will launch together — the ESA-managed Mercury Planetary Orbiter (MPO) and the JAXA-owned Mercury Magnetospheric Orbiter (MMO). The two spacecraft will be delivered to the orbit around Mercury stacked on top of each other by the Mercury Transfer Module (MTM). During the seven-year journey, the MMO will be shielded from the sun by the MMO Sunshield and Interface Structure (MOSIF), which will also serve as a mechanical and electrical interface between the two orbiters.

“MPO focuses on the planet, the surface and the interior size,” said Reininghous. “The orbit is a polar one — 480km times approximately 1500km — a little bit elliptical but extremely close to the planet as such with a return period of 2.3 hours. The data return is estimated at 1.5 gigabit per year.”

The MMO will focus on the planetary environment including the planet’s atmosphere, according to Reininghous. “The orbit is also polar but far more elliptical — 590 km times approximately 11,700 km. It has a period of 9.3 hours. The data return is approximately 10 percent of what we expect from the MPO.”

The European orbiter is much larger and more expensive, with Japanese probe budget being about a tenth the cost.

According to ESA, the mission took so long to build because in 2004, after about seven years of development, ESA suddenly realized that its orbiter’s thermal protection was inadequate, and required a complete redesign. To me, this is either outright incompetence (they knew from the start they were going to Mercury) or a clever way to extend the funding so that it provides an entire lifetime’s work for its builders. Think about it. Twenty-one years from concept to launch, then seven years to fly to Mercury, and then one to two years in orbit. That’s more than thirty years for this single mission.

One comment

Roskosmos completes investigation into deadly post launch debris fire

10:21 am

Russia’s space agency Roskosmos has completed its investigation into the brush fire that caused two deaths at the impact site of the first stage of Soyuz rocket on June 14.

The report reveals several interesting details. First, it appears that the impact sites for abandoned first stages of Russian rockets are considered “planned.” This is not hyperbole. If the launch proceeds as intended, it should be possible to calculate with some accuracy where the abandoned first stage will hit the ground.

Second, it appears the deaths occurred when high winds caused the flames from the impact brush fire to engulf the two workers, one of whom died immediately, with the second dying several weeks later in the hospital.

Third, the agency will do more thorough reconnaissance of impact sites, before and after impact, before sending crews there. It will also augment the equipment and crews, depending on need.

One comment

New Horizons’ next target might be smaller than predicted

10:43 am

The uncertainty of science: Because all attempts to observe an occultation of a star on June 3 by New Horizons’ next target failed, astronomers now think Kuiper Belt object 2014 MU69 is much smaller than previously believed.

The discovery observations using Hubble and other ground-based telescopes had estimated its size as between 12 to 25 miles in diameter. The null result from the June 3 event suggests it is smaller than that.

More occultations are upcoming, so stay tuned.

Leave a comment

Team Indus needs to raise $40 million for Google mission

9:48 am

Capitalism in space: Team Indus, one of five remaining competitors for the Google Lunar X-Prize, announced today that they are now looking for the last half of the total $80 million they need to fly their mission by December.

While hardware and technology aspects have been met, Team Indus is discussing raising finances of roughly ₹120-130 crore ($15-20 million) to meet its total mission costs of around ₹520 crore ($80 million), co-founder Rahul Narayan said on Wednesday. The startup is also offering branding opportunities for their products and services on what will be the first Indian private Moon mission, he told journalists.

Team Indus is part of aerospace innovations company Axiom Research Labs, Bengaluru. It is the lone Indian entry in the global contest, the Google Lunar XPrize worth over $20 million.

It appears that they have so far raised $40 million, and need at least $40 million more to fly the mission. It also appears that if they raise only $20 million they will fly anyway with the hope that they win the $20 million prize to make up the difference.

It is very late in the game to raise this money, which means their success remains a very touch-and-go prospect. What improves their chances however is how they are now selling themselves, not as a Google X-Prize contestant, which is nothing more than a publicity stunt, but as a smallsat construction company that can build satellites for anyone at a low cost. This is very smart.

Leave a comment

Israel and India sign three new space agreements

9:33 am

The new colonial movement: India and Israel have inked three new development agreements between their different government space agencies.

Prime Minister Narendra Modi’s historic visit to Israel has deepened cooperation in space technology between the two countries as the two sides on Wednesday signed three agreements relating to space. The first memorandum of understanding was between Indian Space Research Organisation (Isro) and Israel Space Agency for cooperation in electric propulsion for small satellites, second was on cooperation in GEO-LEO optical links and third pact was on cooperation in atomic clocks (which are satellite components meant to provide precise locational data).

The third agreement is especially interesting. It indicates that India no longer wants to work with the German company that built its most recent GPS satellites because that company’s atomic clocks all had problems. Unlike the ESA, India has decided that such failures should not be rewarded with more work.

2 comments

XCOR shuts down

9:24 am

Capitalism in space: XCOR, the company that was going to fly tourists on the Lynx reusable suborbital plane by 2013, has laid off its last remaining employees.

Though years ago I predicted this failure accurately, I do not celebrate it. I would have much preferred to have been dead wrong, and to have seen Lynx built and flying, making money from space tourism. At the same time, I am also utterly realistic about the realities of capitalism. To have big successes you need to also have sad failures. XCOR unfortunately belongs to the latter.

4 comments

German government sets ethical rules for self-driving cars

9:08 am

What could possibly go wrong? The German government’s Federal Ministry of Transport and Digital Infrastructure has established twenty ethical rules for the design and software of self-driving cars.

The German Federal Ministry of Transport and Digital Infrastructure has recently defined 20 ethical principles for self-driving cars, but they’re based in the assumption that human morality can’t be modeled. They also make some bold assertions on how cars should act, arguing a child running onto the road would be less “qualified” to be saved than an adult standing on the footpath watching, because the child created the risk. Although logical, that isn’t necessarily how a human would respond to the same situation.

So, what’s the right approach? The University of Osnabrück study doesn’t offer a definitive answer, but the researchers point out that the “sheer expected number of incidents where moral judgment comes into play creates a necessity for ethical decision-making systems in self-driving cars.” And it’s not just cars we need to think about. AI systems and robots will likely be given more and more responsibilities in other potential life-and-death environments, such as hospitals, so it seems like a good idea to give them a moral and ethical framework to work with.

It appears these geniuses came up with these rules based on a “virtual study.”

In virtual reality, study participants were asked to drive a car through suburban streets on a foggy night. On their virtual journeys they were presented with the choice of slamming into inanimate objects, animals or humans in an inevitable accident. The subsequent decisions were modeled and turned into a set of rules, creating a “value-of-life” model for every human, animal and inanimate object likely to be involved in an accident.

“Now that we know how to implement human ethical decisions into machines we, as a society, are still left with a double dilemma,” says Professor Peter König, an author on the paper. “Firstly, we have to decide whether moral values should be included in guidelines for machine behaviour and secondly, if they are, should machines act just like humans?”

I know that my readers will immediately reference Isaac Asimov’s three laws of robotics, but that really doesn’t work. Asimov’s laws were incorporated into a science fiction “positronic brain” that was supposedly built almost organically, so complex in formation no one really understood it. Once the laws were incorporated into each brain they could not be tampered with without destroying the brain itself. Our coming robots will have no such protection.

20 comments

Will Dawn head to another asteroid?

4:31 pm

NASA is still reviewing the proposal by the Dawn science team that they send the spacecraft to another asteroid in its last years before its fuel runs out.

The spacecraft has continued operations despite problems with its reaction wheels, used for attitude control. After suffering the loss of two of its four reaction wheels earlier in the mission, a third wheel malfunctioned in April. The spacecraft went into safe mode briefly, but controllers resumed operations with hydrazine thrusters taking over for the failed wheel. That failure will eventually lead to the end of the mission when the spacecraft runs out of hydrazine. “It does reduce our lifetime because we have to use hydrazine at a faster rate,” Raymond said at the SBAG meeting in June.

That lifetime, she said, is dependent on the spacecraft’s orbital altitude. Dawn has spiraled out to a higher orbit during its extended mission, which reduces the amount of hydrazine needed for attitude control. “The lifetime is now highly dependent on orbital altitude because we need to use the jets to fight the gravity gradient torques,” she said. In its current high orbit, Raymond said that Dawn had sufficient hydrazine, as well as xenon propellant used for the ion engine, to operate at least through the end of 2018.

5 comments

Five satellite Air Force contract up for bid

4:26 pm

Capitalism in space: The Air Force has announced that it will be soliciting bids from SpaceX and ULA for a 5-satellite launch contract.

Claire Leon, director of the Launch Enterprise Directorate at the Air Force’s Space and Missile Systems Center, told reporters that grouping launches together was an effort to streamline and speed the acquisition process at a time when the national security sector is demanding ever-increasing access to space. “By doing five at once, it makes our acquisition more efficient and it allows the contractors to put in one proposal,” she said.

This grouping however might make it impossible for SpaceX to win the contract, as the company’s Falcon 9 rocket might not be capable of launching all five satellites, and its Falcon Heavy has not yet flown the three times necessary before the Air Force will consider using it.

6 comments

Qatar blockade threatens worldwide helium supply

8:54 am

The recent blockade imposed against Qatar by other Middle East countries, supposedly because of its support of terrorism, threatens the world’s supply of helium.

Qatar is the world’s largest exporter of helium and its second-largest producer, accounting for 25% of global demand (see ‘Helium supplies’). So the blockade will inevitably cause shortfalls over the next few months, says Phil Kornbluth, a consultant based in Bridgewater, New Jersey, who specializes in the helium industry.

Countries likely to be most affected are those closest to Qatar. But Asian countries such as India, China, Japan, Taiwan and Singapore are also at risk. “But none of us are immune,” adds William Halperin, a researcher in low-temperature physics at Northwestern University in Evanston, Illinois.

The U.S. is the world’s largest producer of helium, producing about twice as much as Qatar. That production is for our local markets, while Qatar exports it worldwide.

One comment

World View test balloon flight cut short due to leak

9:10 pm

The first test flight of World View’s Stratollite balloon, planned for 4 days, was ended after only 17 hours because of a leak in the balloon.

Though the mission was the longest yet for the balloon, and though they managed to test the attitude control, communications, and solar power systems, they need to find out why the balloon did not hold pressure as expected before they can begin flying missions lasting from months to even a year.

Leave a comment

North Korea test fires another ballistic missile

7:01 pm

North Korea today launched another test missile into nearby waters, this time landing in Japanese waters.

Update: North Korea now claims this was an ICBM that could have reached Alaska, and some of the experts quoted appear to agree.

It was estimated to have reached an altitude that “greatly exceeded” 2,500 kilometres, Japan said, prompting arms control specialist Jeffrey Lewis to respond on Twitter: “That’s it. It’s an ICBM. An ICBM that can hit Anchorage not San Francisco, but still.”

David Wright, of the Union of Concerned Scientists, wrote on the organisation’s allthingsnuclear blog that the available figures implied the missile “could reach a maximum range of roughly 6,700 km on a standard trajectory. … That range would not be enough to reach the lower 48 states or the large islands of Hawaii, but would allow it to reach all of Alaska.”

27 comments

Long March 5 failure occurred at satellite separation

8:57 am

This story notes that the failure of the Long March 5 launch occurred 30 minutes after launch, when the second stage and the satellite were due to separate.

The link also includes footage of the launch through first stage separation and ignition of second stage engines.

It appears therefore that the failure was not in the Long March 5 rocket itself. When satellite separation occurs the second stage has completed its work, so the rocket apparently did its job getting the satellite into orbit. What happened next however remains unknown.

Based on this information it would appear that this failure might not delay later launches of the Long March 5 that much.

12 comments

Surrey Satellite closing U.S. factory

5:10 pm

Capitalism in space: Surrey Satellite Technology, one of the first companies to build smallsats and cubesats, is closing its U.S. factory in Colorado and concentrating its satellite work once again in the UK.

It appears the company might have gotten a little fat and lazy, and has allowed the competition to begin passing it by:

Parker said the exact number of people SST-US will let go has not been determined. SSTL’s decision to layoff workers in the U.S. is not related to the decline in geostationary telecommunications satellite orders that triggered a reduction in workers at Space Systems Loral, Parker said. The majority of SSTL’s business is in remote sensing, navigation and science — spacecraft typically found in non-geosynchronous orbits.

Instead, Parker said it was more out of concern that the smallsat movement the company had championed for years had picked up steam and was moving without SSTL. “We had grown slightly fatter, slightly more complacent, so we are doing a lot of work on our organization. We started last year and changed our organizational structure internally. We changed the way our teams are organized so we now have a much flatter structure with more autonomy,” she said.

SSTL is not reducing its headcount in the U.K., Parker said.

This kind of reminds me of ULA’s recent effort to streamline its operations, faced with competition from SpaceX. Here, Surrey is finding itself getting beat by a lot of new players, and had found it needs to reshape itself to survive.

2 comments

Dress rehearsal completed for SpaceX’s Sunday launch

10:29 am

Capitalism in space: SpaceX yesterday successfully completed the static fire dress rehearsal countdown for its planned Sunday Falcon 9 launch, which would be the third SpaceX launch in 9 days.

The article also provides some good information about the company’s efforts to recover the first stages and the fairings from the past two launches. For example:

This mission [the Florida launch of a Bulgarian satelltie] also included another test per SpaceX’s fairing recovery aspirations. Classed as the best attempt to date, SpaceX has added steerable parachutes to guide the fairing halves to the ocean surface, before it deploys a “bouncy castle” that protects it while it awaits recovery. The technology is still being refined, but Elon Musk believes full recovery could be achieved later this year.

8 comments

More political problems for the private Russian company taking over Sea Launch

10:04 am

Link here. The Russian airline company S7 wants to resume use of the Ukrainian Zenit rockets on the Sea Launch platform. They also want to fly that rocket several times from Baikonur. The problems have been getting Russia and Ukraine to work together.

Despite good progress on the engineering front of the Angosat-1 mission, political problems continued hampering the preparations of the Russian-Ukrainian launch. As of the end of June 2017, the planned liftoff for Angosat-1 slipped to October 21, however, even that date was considered optimistic within the industry. At the time, the Ukrainian team, which had to perform a scheduled maintenance on the Zenit rocket, was still waiting for permission to travel to Baikonur from the Ukrainian authorities.

Earlier, there were disputes from Russia that delayed work.

Leave a comment
1 … 317 318 319 320 321 … 505