Солнечные паруса.

[Виктop B.]

Кто-нибудь знает японский??!!
http://twitter.com/ikaroskun

http://translate.google.ru/?hl=ru&tab=wT#ja|ru|

А вы сами пробывали? Такая билиберда на выходе.

[Брабонт]

Во-первых, не переводите сразу на русский. Только JPN -> EN.
 Во-вторых, кроме воплей радости от того, что IKAROS на связи, там ничего существенного. Пока не нашёл прямого подтверждения, что парус развернулся штатно.

[Виктop B.]

Во-первых, не переводите сразу на русский. Только JPN -> EN.
 Во-вторых, кроме воплей радости от того, что IKAROS на связи, там ничего существенного. Пока не нашёл прямого подтверждения, что парус развернулся штатно.

Он вроде еще не мог успеть штатно развернуться. Как минимум сначала через несколько дней его закручивают, а потом в течение недели-двух он разворачивается.   То что пошла телеметрия уже хорошо.

А с тем что там написано, я разобрался, да.

[SpaceR]

На Мембране неплохая статейка с описанием:
http://www.membrana.ru/articles/technic/2010/05/04/135600.html



В конце информируют о следующем паруснике, уже для полета к троянцам:




Красавец, ничего не скажешь.  :lol:

А кто-нибудь помнит, были ли после "Знамени-2" ещё примеры успешного разворачивания в космосе парусоподобных конструкций?

[Палкин]

Кто знает подробности о предстоящем пуске "Цветка" Японией в конце 2011 года к Юпитеру? Там кажется сторона 50 м, а также есть научная аппаратура...

[Salo]

Вы об чём?

[Палкин]

О солнечном парусе

[АниКей]

....Следующий японский солнечный парусник будет представлять собой "цветок" диаметром 50 метров. При этом, даже  такой аппарат инженеры из Страны восходящего солнца ещё именуют "средним", недвусмысленно намекая на масштабы развития всей программы и рост размеров японских солнечных парусов.

Интересной особенностью этой второй машины будут интегрированные ионные двигатели, которые помогут солнечному паруснику маневрировать на пути к месту назначения и непосредственно около него. А цель данного космического аппарата куда более далёкая, нежели Венера: это Юпитер и Троянские астероиды....

http://1-space-fact.livejournal.com/3571.html
пару постов выше ссылка у SpaceR на статью о том-же http://www.membrana.ru/particle/3375

[ZOOR]

2 АниКей Не надо удивляться, данный участник форума даже прямых ссылок не замечает - http://www.novosti-kosmonavtiki.ru/phpBB2/viewtopic.php?p=688446#688446

[Salo]

Кто знает подробности о предстоящем пуске "Цветка" Японией в конце 2011 года к Юпитеру? Там кажется сторона 50 м, а также есть научная аппаратура...

Вы об чём?

О солнечном парусе

А я о дате пуска. Ссылочкой на оную не поделитесь.

[Salo]

На сайте JAXA "цветка" я не обнаружил. Плохо искал?

[ДалекийГость]

На сайте JAXA "цветка" я не обнаружил. Плохо искал?

http://www.jspec.jaxa.jp/e/activity/ikaros.html
В конце страницы, под заголовком "Next plans".

[Salo]

Спасибо!

http://www.jspec.jaxa.jp/e/activity/ikaros.html

Next plans

The second mission will take place in the late 2010s. It will involve a large sized solar power sail with a diameter of 50m, and will have integrated ion-propulsion engines. The destinations of the spacecraft will be Jupiter and the Trojan asteroids. Solar sail missions are also being studied in the United States and in European countries. JAXA will lead future solar system exploration using solar power sails. Our missions will lead to lower cost in the solar cells market, whose growth is a key factor for global warming prevention. Those low-cost solar cells are also the foundation of future solar power satellite systems.

Изображение увеличивается кликом.

late 2010s означает конец 2011 года?  :roll:  :wink:

[КотКот]

И всё же объясните дураку, как лететь к Солнцу? Ведь, как парус не поворачивай, а всё равно передаваемый аппарату импульс будет иметь положительную составляющую по оси Солнце-аппарат... Может, тут предполагаются хитрые манёвры, переходы на разные орбиты, разворачивание его в заданых участках этих орбит... Но тогда эта операция на многие годы. А вообще это в принципе возможно?

Да, с солнечными парусами --- это годы и десятилетия. Смотрите Зубрина...

[Salo]

http://www.spacenews.com/civil/110328-smooth-sailing.html

Mon, 28 March, 2011
Smooth Sailing[/size]
By Debra Werner

Stellar Exploration Inc. at a Glance

Mission: A small technology company focused on innovative and low-cost scientific and space exploration projects.

Established: 1997

Location: San Luis Obispo, Calif.

Top Official: Tom Svitek, President

Personnel: 10

SAN FRANCISCO — As a college student in Prague, Tomas Svitek was fascinated by solar sails. It was the 1970s. NASA, the European Space Agency and Japan were all exploring whether solar sails could assist spacecraft missions to rendezvous with Halley's Comet. Although solar sail technology was deemed too immature at the time, Svitek's interest in the concept never waned.

More than three decades later, after fleeing Czechoslovakia as a political refugee during the Cold War, Svitek is putting the finishing touches on his solar sail. His small company, Stellar Exploration Inc. of San Louis Obispo, Calif., is the systems integrator for LightSail-1, the Planetary Society's $2.2 million effort to build a kite-shaped, mylar solar sail that fits in a triple cubesat, a standardized satellite bus comprised of three 10-centimeter cubes.

If all goes well, LightSail-1 will fly in 2012, turning and tacking to maintain its orbit, while relaying images of the sail to viewers on Earth, said Lou Friedman, LightSail-1 program director and former executive director of the Pasadena, Calif.-based Planetary Society.

Like Svitek, Friedman is a passionate advocate for solar sails, which propel spacecraft by harnessing the energy produced when photons emitted by sunlight bounce off sails comprised of reflective, lightweight material. "The lure is that you can travel without fuel," said Friedman, who led the NASA Jet Propulsion Laboratory's effort to develop a solar sail for the 1986 Halley's Comet mission and subsequently wrote a book on the subject. "It's the only technology we know that will take us to the stars."

More immediately, solar sails offer a way to keep spacecraft in nontraditional orbits such as artificial Lagrange points, the gravitationally stable positions between planets or planets and stars. A space agency could station cargo at various places in the solar system with the help of solar sails to maintain the spacecraft's position, Svitek said.

These and other potential applications have spurred space agencies around the world to design solar sails. Until 2010, however, no space agency had succeeded in using solar sails as the primary method of spacecraft propulsion.

That all changed in July when the Japan Aerospace Exploration Agency deployed a square, 14-meter solar sail known as Interplanetary Kite-craft Accelerated by Radiation of the Sun (IKAROS). IKAROS was spin-stabilized, meaning it whirled around in a circle to maintain the sail's shape.

In January, NASA deployed its first solar sail: NanoSail-D, a 10-square-meter, polymer sail designed by engineers from NASA's Marshall Space Flight Center in Huntsville, Ala., and NASA Ames Research Center in Mountain View, Calif. NanoSail-D, which also fit inside a triple CubeSat, unfurled its sail on Jan. 20. That sail remains in space but is slowly falling back to Earth, said Dean Alhorn, NanoSail-D principal investigator at NASA Marshall. NanoSail-D is designed to demonstrate solar sail technology and to offer a new way to drag satellites out of orbit once they have completed their missions. Alhorn is designing a drag sail for another microsatellite to demonstrate the use of solar sails to deorbit a spacecraft when it has completed its mission. He declined to name that satellite.

The Planetary Society's LightSail-1 team plans to build on the design of NanoSail-D by using a similar boom to hold the sails in place and adding components to control the sail's position. For deep space operations, the sail will remain in a fixed position for weeks at a time. To change its orbit, however, the LightSail-1 will be capable of sluing 90 degrees in 15 minutes, Svitek said.

LightSail-1 weighs 4.5 kilograms and is equipped with two cameras, on-board accelerometers, an attitude control system, six solar arrays for battery charging and telemetry components to relay data to ground stations.

Stellar Exploration is building the solar sail and associated electronics and acting as LightSail-1 systems integrator. A team of engineers at the California Polytechnic State University in San Louis Obispo is designing the spacecraft's avionics, and students at the Georgia Institute of Technology are preparing to manage mission operations from their Center for Space Systems in Atlanta.

By July, the team plans to complete LightSail-1 assembly and testing, said Jim Cantrell, LightSail-1 program manager and president of Strategic Space Development, a consulting firm based in Tucson, Ariz. Then, the team will store the spacecraft and wait for a ride into orbit. Cantrell said he is confident that ride will come in 2012, but declined to specify the government mission likely to carry the solar sail into space.

In February, NASA announced that LightSail-1 was one of 20 cubesats approved as secondary payloads on rockets scheduled for launch in 2011and 2012. While that selection helps tremendously, Cantrell said, it is much harder to find a ride for LightSail-1 because it needs to go into an orbit far higher than most cubesats. To prevent atmospheric drag from interfering with flight, LightSail-1 is seeking a ride to an orbit of more than 825 kilometers, Friedman said.

If the launch is successful, the Planetary Society plans to follow it up with additional solar sail flights. The LightSail-1 team bought a complete set of spare parts that can be used to build LightSail-2. "It was cheap to buy the spares when we were buying the first set," Cantrell said. The team also is discussing plans for a third solar sail, although that mission has not yet been defined, Cantrell added. The Planetary Society's website advertises LightSail-3 as a "mission to demonstrate that solar sails can provide an early-warning station for geomagnetic storms triggered by eruptions from the Sun."

Svitek already is busy crafting plans for future solar sails and other spacecraft components. After fleeing Czechoslovakia, Svitek earned a doctorate in planetary science from the California Institute of Technology in Pasadena. He later worked on small planetary missions at NASA's Jet Propulsion Laboratory, served as principal scientist at Orbital Sciences Corp. of Dulles, Va., and led the science team for Early Bird 1, an imaging satellite launched in 1997 by DigitalGlobe of Longmont, Colo.

In 1997, Svitek established Stellar Exploration, where he serves as president. With 10 employees, the company develops miniature propulsion systems and advanced antennas for small satellites. The LightSail-1 project has comprised about 50 percent of the firm's work for the last year. It also was the first time the company took on the task of integrating an entire spacecraft.

[Димитър]

http://www.membrana.ru/particle/16879

NASA запустит в космос солнечный парус площадью 1444 м2

Новый аппарат должен нести квадратный парус со сторонами по 38 метров. Для сравнения напомним, что первый американский солнечный парусник — NanoSail-D — оснащён скромным полотнищем площадью 9,3 м2. А первый в мире парусник, показавший реальное ускорение за счёт света, японский IKAROS, может похвастать 200 «квадратами».
"Японец", ставший заодно и первым в мире парусником, покинувшим околоземную орбиту, успешно выполнил свою миссию летом 2010 года, а американский аппарат расправил парус лишь в январе 2011-го.
...
Старт паруса-рекордсмена намечен на 2015 или 2016 год. Для снижения расходов на миссию аппарат планируется запустить как попутную нагрузку вместе с каким-нибудь другим спутником на борту коммерческого носителя.

[Константин Дюкарев]

http://stp.cosmos.ru/index.php?id=1137&no_cache=1&tx_ttnews[tt_news]=1911&cHash=6afa7a55111391faa4c85e62be19f501

Рекордный солнечный парус должен быть создан через три года, а стартует он примерно через год после создания (иллюстрация NASA).

[instml]

Visiting a Solar Sail in the OC

The city of Tustin is about an hour's drive from Planetary Society HQ in Pasadena. That's when the freeway gods are kind, which they never are. The trip I made there yesterday was well worth the trouble. I parked next to the industrial park offices of L'Garde, Inc and walked into a plain vanilla reception area, the kind you've probably visited a hundred times, if you don't work behind one.

The plain vanilla soon turned to ultra chocolate with walnuts and fudge sauce. This relatively small company, founded more than 40 years ago, bills itself as "the world leader in hybrid inflatable deployed space structures." Their high bay makes a good case for that lofty statement. It's where they are building a big solar sail that may leave our planet in 2014. It's also where lots of L'Garde staff were joined by NASA's brand new Chief Technologist, Mason Peck.



L'Garde High Bay
Lots of big and very cool space toys live in the L'Garde high bay.

Dr. Peck got the job in January. His distinguished record of innovation and leadership resulted in an offer from NASA Administrator Charles Bolden that he couldn't refuse. He was a good choice for the job. His enthusiasm for developing and sharing space technology was obvious and even uplifting. This guy is a true believer. Turns out that my colleague, Planetary Society Director of Projects Bruce Betts, already knew all this. Mason is on loan to NASA from Cornell University, where he has worked closely with Bruce and others on the development of microrovers.

Mason has begun by visiting NASA centers throughout the country, along with agency partners and contractors like L'Garde. The company received a Technology Demonstration Mission (TDM) contract for development of the sail that is now coming together.

I was surprised to learn that another guest of honor yesterday was my Congressman. Dana Rohrabacher is the Republican representative of California's 46th District. He may be better known as a surfer than for his interest in space development, but it was space that got his enthusiastic attention yesterday as we toured the high bay. I was pleased to hear the Congressman talk about his concerns regarding the proposed NASA budget. He opposes cuts to Mars and other planetary science missions, and he praised the Planetary Society as a good partner in the fight for restoration. He also complained about his colleagues' lack of interest in the threat posed by Near Earth Objects, but most of his comments were about the tremendous importance of innovation for the future success of the US economy.

Hanging on the back wall was a copy of L'Garde's huge Inflatable Antenna Experiment that was successfully deployed by the crew of STS-77. L'Garde's Nathan Barnes and others told us how that and other projects helped the firm prepare for building a solar sail.



L'Garde, Inc. Tour
Nathan Barnes of L'Garde enjoying a moment with Congressman Dana Rohrabacher and NASA Chief Technologist Mason Peck

We were shown a thirty-meter long spar laid out along a table. Amazingly, it weighs just over a kilogram, or about 2.5 pounds. A similar structure will be part of the sail's skeleton. The gas that expands it in space just gets things started. Once inflated, the cold of space will stiffen the structure, providing the frame for an incredibly thin (1,000 angstrom) 1,200 square meter Kapton sail. We could easily see the ceiling lights through a sail section suspended in the high bay.



Solar Sail Spar in L'Garde High Bay
Thirty meter spar or support member for the 1,200 square meter solar sail under construction at L'Garde.

The launch mass of the entire spacecraft will be about 112 kilograms. By comparison, the Planetary Society's much smaller LightSail 1 weighs less than 5 kilograms. After deployment, small vanes at the sail's corners will steer it to the L1 Lagrange point in space. At least, that's the plan. Testing navigation of this huge ship is one of the primary goals of the mission.

L'Garde is pretty confident. Here's an animation of an even larger sail they'd like to build. It would spread its wings across 10,000 square meters. The company gives lots of credit to the Planetary Society and our Lou Friedman as pioneers in the development of these craft that may someday fly among the planets and even to other stars. We wish them luck.

http://www.planetary.org/blog/article/00003422/

[instml]

Видео

[instml]

Friday, March 16, 2012

L'Garde Plans Space Solar Sail in 2014-2015

L'Garde, Inc. provided this animation of a 10,000 square meter behemoth of a sail being deployed above the Earth.  L'Garde was awarded a NASA Technology Demonstration Mission (TDM) contract to build and fly a large solar sail in 2014-2015.

Solar sails are a possible alternative to conventional fuels for interplanetary flight. The L'Garde TDM solar sail will demonstrate the potential of sails for use in future missions and pave the way toward new space capabilities. L'Garde is partnering with commercial and government groups for this effort.

There are multiple possibilities in the future using solar sails in space: 1] Orbital Debris: Orbital debris can be captured and removed from orbit over a period of years using the small solar-sail thrust; 2] De-orbit of spent satellites: Solar sails can be integrated into satellite payloads so that the satellite can be de-orbited at the end of its mission; 3] Station keeping: Using the low propellantless thrust of a solar sail to provide station keeping for unstable in-space locations; and, 4] Deep space propulsion: Payloads free of the Earth's pull can be continuously and efficiently accelerated to the other planets, or out of the solar system.

http://spaceports.blogspot.com/2012/03/lgarde-plans-space-solar-sail-in-2014.html