Showing posts with label SATELLITE. Show all posts
Showing posts with label SATELLITE. Show all posts

Wednesday, March 26, 2014

French Satellite Spots 122 Objects In Possible MH-370 Debris Field

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French Satellite Spots 122 Objects In Possible MH-370 Debris Field

Sunday, December 29, 2013

Weather forecasting is about to improve with satellite launch





NASA and the Japan Aerospace Exploration Agency announced the launch of a precipitation satellite that will enhance how we understand the climate.


The Global Precipitation Measurement Core Observatory satellite will be launched on February 27 from Japan’s Tanegashima Space Center and will measure precipitation and energy cycles.


Researchers say that it will improve weather forecasting worldwide.


“Launching this core observatory and establishing the Global Precipitation Measurement mission is vitally important for environmental research and weather forecasting,” said Michael Freilich, director of NASA’s Earth Science Division in Washington.


“Knowing rain and snow amounts accurately over the whole globe is critical to understanding how weather and climate impact agriculture, fresh water availability, and responses to natural disasters.”


More from GlobalPost: Rescue of research vessel trapped in Antarctica ice delayed again (VIDEO)


Apart from giving more accurate weather forecasts, the satellite will be able measure the size and distribution of raindrops, snowflakes and ice, helping agriculture, and averting natural disasters.


“We will use data from the GPM mission not only for Earth science research but to improve weather forecasting and respond to meteorological disasters,” said Shizuo Yamamoto, executive director of JAXA


http://www.globalpost.com/dispatch/news/science/131229/weather-forecasting-about-improve-satellite-launch




GlobalPost



Weather forecasting is about to improve with satellite launch

Tuesday, December 10, 2013

Using Satellite, Scientists Pinpoint Coldest Place On Earth





Sastrugi stick out from the snow surface in this photo near Plateau Station in East Antarctica. Most of Antartica looks quite flat, despite the subtle domes, hills, and hollows.



Atsuhiro Muto/ National Snow and Ice Data Center

Sastrugi stick out from the snow surface in this photo near Plateau Station in East Antarctica. Most of Antartica looks quite flat, despite the subtle domes, hills, and hollows.



Sastrugi stick out from the snow surface in this photo near Plateau Station in East Antarctica. Most of Antartica looks quite flat, despite the subtle domes, hills, and hollows.


Atsuhiro Muto/ National Snow and Ice Data Center



Using data from a NASA satellite, scientists at the National Snow and Ice Data Center (NSIDC) say they have now pinpointed the coldest place on Earth.


On a 1,000 kilometer swath of the highest section of the East Antarctic ice divide, scientists measured temperatures of -134 to -137 degrees Farenheit.


That is about 8 degrees lower than the coldest temperature ever recorded. The AP reports the old record — -128.6 degrees — was measured by thermometers in Vostok, Antartica, in 1983.


The AP reports:



“Ice scientist Ted Scambos at the National Snow and Ice Data Center said the new record is ’50 degrees colder than anything that has ever been seen in Alaska or Siberia or certainly North Dakota.’


“‘It’s more like you’d see on Mars on a nice summer day in the poles,’ Scambos said, from the American Geophysical Union scientific meeting in San Francisco Monday, where he announced the data. ‘I’m confident that these pockets are the coldest places on Earth.’


“However, it won’t be in the Guinness Book of World Records — or recognized by the World Meteorological Organization (WMO), the official keepers of world weather records — because the readings were measured by satellites, not from thermometers, Scambos said.”




If you’re staring out a window and looking at some snow right now, you might be wondering just how different 20 degrees feels from -137 degrees. In a statement Scambos said: “I’ve never been in conditions that cold and I hope I never am. I am told that every breath is painful and you have to be extremely careful not to freeze part of your throat or lungs when inhaling.”


Scambos explains that conditions have to be just right to reach this extreme:



“Under clear winter skies in these areas, cold air forms near the snow surface. Because the cold air is denser than the air above it, it begins to move downhill. The air collects in the nearby hollows and chills still further, if conditions are favorable.


“‘The record-breaking conditions seem to happen when a wind pattern or an atmospheric pressure gradient tries to move the air back uphill, pushing against the air that was sliding down,’ Scambos said. ‘This allows the air in the low hollows to remain there longer and cool even further under the clear, extremely dry sky conditions,’ Scambos said. ‘When the cold air lingers in these pockets it reaches ultra-low temperatures.’”




NASA put together this video to give you an idea of where this place is and what the topography looks like:




News



Using Satellite, Scientists Pinpoint Coldest Place On Earth

Friday, December 6, 2013

How many satellite launches does it take to get to Mars?


On Tuesday, SpaceX successfully launched a commercial communications satellite into orbit after two abortive attempts, a major milestone in entrepreneur Elon Musk’s lofty mission to build a private space program. In 2012, an ISS supply mission made SpaceX’s Dragon capsule the first privately owned spacecraft to dock with the station; Musk himself has become one of the figureheads of a new, aspirational entrepreneurship that prizes impossible ideas alongside traditional business. And SpaceX’s success comes after years of worry about whether NASA is still capable of the grand feats it achieved in the mid-20th century — and speculation that SpaceX and its many competitors, not an old guard of aerospace companies and government agencies, will be the future of extraterrestrial exploration.


The launch isn’t just a springboard for more contracts. It’s the start of a revenue stream that Musk hopes will help the company reach its long-term goal: sending humans to Mars. Aerospace journalist Michael Belfiore says SpaceX is miles ahead of similar startups, calling it “the lynchpin of America’s manned space program.” Competitor Orbital Sciences has an established cargo program — this fall, it became the second private company to have a ship dock with the ISS — but it’s not planning manned trips, and Sierra Nevada’s Dream Chaser is too dependent on federal funding, Belfiore tells The Verge.


“They only go as far as NASA goes. And that funding is always in question.” Blue Origin, backed by Amazon’s Jeff Bezos, is more mysterious. The company was last seen firing its latest engine at a Texas test site, and NASA said it was making “steady progress” in its work as a commercial partner to the agency. But Musk has mocked its prospects. During a battle over the lease of a space shuttle launch pad, he said he’d be happy to let Blue Origin use the pad if it could produce a craft capable of docking with the ISS in the next five years: “Frankly, I think we are more likely to discover unicorns dancing in the flame duct.”


Sessatellite
An SES-8 satellite like the one launched by SpaceX. (Orbital Sciences)


As it starts a long series of satellite launches, though, SpaceX is competing with established players like France’s Arianespace and the United Launch Alliance, a joint venture between Boeing and Lockheed Martin. Both launch satellites at a much higher price: Belfiore puts the typical ULA cost at a quarter million dollars, compared to SpaceX’s roughly $ 60 million. For now, the ULA is relatively insulated from competition — it relies heavily on contracts with government agencies like NASA and the Department of Defense, and SpaceX’s first few victories probably won’t make the heavily entrenched giant take notice.


SpaceX can beat other companies for price, but it’s still building trust


SpaceX has an advantage on price, but that doesn’t mean it’s going to cut out more expensive options just yet. Some launches will remain beyond the Falcon 9’s capabilities for now, and aerospace analyst Jeff Foust says there’s good reason for buyers to be conservative. “Some of the largest communications satellites cost in the range of 200 million to 300 million dollars. That’s a big investment for the company that’s buying the satellite, and they may not necessarily want to try and save a few bucks on the launch.” Spy satellites, or satellites needed for crucial scientific research, also aren’t likely to launch with a company that’s only had a handful of successful takeoffs. If SpaceX can manage to work safely through its heavily stacked manifest in the next two years, though, the scales could tip — especially as it prepares to launch its more powerful Falcon Heavy rocket and starts looking to steal the ULA’s government contracts. “The next really big challenge for [SpaceX] is to keep the same reliability and the same price but at a much higher tempo,” says Foust.


A steady stream of satellite launches would give SpaceX some of the funds it needs to work towards its eventual goal of sending humans to the moon and Mars, and boost the Dragon’s chances of supplanting Russia’s Soyuz capsule to shuttle astronauts to and from the ISS. Unlike many similar companies, SpaceX has a certain level of independence from NASA funding, with financial backing from Musk and a long list of private customers. “Essentially almost three quarters of our business is commercial,” Musk said earlier this year. “So yeah, it would suck to lose the government as a customer, because it’s our biggest customer. But it certainly wouldn’t be a fatal blow.” That prospect is unlikely, but it also means SpaceX can take risks independent of NASA’s budget.


5e1gj_mediumA scale model of The Space Launch System in a NASA wind tunnel. (NASA / ARC / Dominic Hart)


That budget remains a point of debate. By farming out “routine” space trips to private companies, NASA is focusing its work and funding on research, including plans for the Space Launch System, a powerful rocket that’s supposed to take astronauts to a near-earth asteroid by 2025. Where some see a good strategic move for NASA’s spacecraft program, however, others see a sign that SpaceX and other private companies are far better equipped to do the job. The SLS, which completed its preliminary design review last year and is scheduled to fly for the first time in 2017, has been dubbed the “Senate launch system” by critics who accuse members of Congress of padding their state’s budget to produce something the space program doesn’t need.


“We’re no longer in an Apollo era.”


“We’re no longer in an Apollo era, where we have to have this massive push at whatever cost. A lot of people are trying to get NASA back to the research function that its predecessor organization was set up to do,” says Belfiore. “They would do basic research that the industry could make use of. And they didn’t operate vehicles.” Foust disagrees, saying that there’s always going to be a place for the agency to build spacecraft. “NASA really wants to contract out those things where it’s not going to be the only customer,” he says; if the system won’t be used by other agencies or companies, there’s no point in trying to spread out the costs with a contract. “If you’re doing cutting-edge exploration, that’s something really only NASA can do, and it makes sense for NASA to keep that in-house for the time being.”


Either way, NASA will still provide vital resources. Even as it minimizes its spacecraft production, the agency is going forward with ambitious research missions like its asteroid-capture plan and a manned trip to Mars, and private companies still lean on its infrastructure and research. And ideally, no matter who wins the battle for a launch contract or supply trip, these missions will attract companies like Bigelow Airspace, which builds inflatable space stations but can’t deploy them without rockets — which, in turn, will be a limited business if space travel doesn’t expand. “It’s kind of a chicken-or-egg thing. These ventures are counting on SpaceX to succeed, and it’s all very tenuous,” says Belfiore. “All these pieces are kind of floating out there, and we’re just on the verge of realizing them. And people like me, who are very hopeful and think this is going to work, depend on all of this kind of coming together at the same time.”




The Verge – All Posts



How many satellite launches does it take to get to Mars?

Monday, November 25, 2013

Space satellite on red atmosphere

At Alternate Viewpoint, the privacy of our visitors is of extreme importance to us (See this article to learn more about Privacy Policies.). This privacy policy document outlines the types of personal information is received and collected by Alternate Viewpoint and how it is used.


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Space satellite on red atmosphere

Friday, November 8, 2013

Scientists expect satellite crash next week

BERLIN (AP) — The European Space Agency says its GOCE research satellite will crash to Earth on Sunday night or during the day on Monday, but debris is unlikely to cause any casualties.
Science Headlines



Scientists expect satellite crash next week

Tuesday, October 15, 2013

AMAZE: Europe’s ambitious aim to 3D print a single-piece satellite



Published time: October 15, 2013 15:35

Photo from Flickr/ESA_events

Photo from Flickr/ESA_events




The European Space Agency (ESA) launched its AMAZE project on Tuesday to take 3D printing into the metal age by building parts for spacecraft, jet engines and fusion projects.


The AMAZE project uses what is known as Additive manufacturing or 3D printing – building up parts layer on layer from 3D digital printing, and was officially launched on Tuesday at the London Science Museum. The technology has already revolutionized the way plastic products are designed and made.


AMAZE, an acronym for Addictive Manufacturing Aiming Towards Zero Waste and Efficient Production of High-Tech Metal Products, can be harnessed to print parts for planes and rockets, and would also save money and cut waste because of the way components are made.


By using a layered method of assembly, engineers can create intricate designs, which would be impossible through traditional metal casting.


Using traditional metal casting often wastes the source material and if these are high strength components such as titanium, tantalum or vanadium then they are extremely expensive. 


Additive manufacturing or 3D printing produces almost no waste during the production of metal components, the scientists behind the project say. By printing objects as a single piece without welding or bolting makes them both stronger and lighter.


Parts for jet engines or satellites would therefore be both lighter and more robust. AMAZE would use materials which can withstand temperatures of up to 3,000C, such as tungsten alloy components. 


“Our ultimate aim is to print a satellite in a single piece. – one chunk of metal that doesn’t need to be welded or bolted. To do that would save 50 percent of the costs – millions of euros,” said David Jarvis, ESA’s head of new materials and energy research, as cited by the BBC.


At a temperature of 3,000C components would be able to withstand conditions on the nozzles of rockets or inside a fusion reactor. The Sun is a natural fusion reactor.


Photo from Flickr/ESA_events


“We want to build the best quality metal products ever made. Objects you can’t possibly manufacture any other way. To build a [fusion reactor], you somehow have to take the heat of the Sun and put it on a metal box. 3,000C is as hot as you can imagine for engineering. If we can get 3D metal printing to work, we are well on the way to commercial nuclear fusion,” said Jarvis.


28 partners from across European industry and science are working together to realize the 20 million euro project, including EADS, Airbus, Astrium, Norsk Titanium and the Culham Centre for Fusion Energy.


AMAZE scientists have already begun printing jet engine parts and airplane wing sections up to two meters in size. 


But despite his unbounded optimism, Jarvis is honest about the problems that still need to be overcome with Additive manufacturing.


“One common problem is porosity, small air bubbles in the product. Rough surface finishing is an issue too. We need to understand these defects and eliminate them – if we want to achieve industrial quality,” he said.


The Europeans are not the first people to apply 3D technology to the space industry. Earlier this year NASA successfully tested a 3D rocket injector.


An injector is a rocket engine part that delivers fuel of liquid oxygen and gaseous hydrogen into a combustion chamber where it is ignited.


The injector was the largest 3D printed rocket component NASA has ever tested and produced ten times more thrust than any other 3D injector made previously by NASA.


The 3D injector was made of just two parts, whereas its predecessor, made using traditional metal casting, had 115. Now that NASA has proved it is able to produce parts of very sophisticated equipment through 3D, it plans to make more engine parts using the technology.


The US National Network for Manufacturing Innovation and the Advanced Manufacturing Initiative, of which NASA is lead partner, are, like ESA and the Amaze program, looking for ways to reduce the cost of space travel using innovative materials and additive manufacturing.




RT – News



AMAZE: Europe’s ambitious aim to 3D print a single-piece satellite