mercredi 23 avril 2014

Astronauts Complete Short Spacewalk to Replace Backup Computer












ISS - Expedition 39 Mission patch.

April 23, 2014

NASA Astronauts Steve Swanson and Rick Mastracchio have completed a short spacewalk to replace a failed Multiplexer/Demultiplexer (MDM) back up computer. They began the re-pressurization of the Quest airlock at 11:32 a.m. EDT signifying the excursion’s end time.


Image above: A spacewalker works on the S0 truss after replacing a failed backup computer. Image Credit: NASA TV.

The backup computer failed April 11 after a routine health check by the Mission Control team in Houston. While the primary computer continues operating flawlessly NASA managers ordered Wednesday’s spacewalk repair to ensure redundancy on critical systems. The computer outage did not pose a risk to the six crew members aboard the space station.

Read NASA’s official statement on the backup computer failure: http://www.nasa.gov/content/back-up-computer-not-responding-to-commands/

The duo worked on the S0 truss which is where the backup MDM is located. The truss is located above the Destiny laboratory module and forms the center of the station’s Integrated Truss Structure, or backbone. The MDM provides telemetry and commands to truss systems, solar alpha rotary joints and the Mobile Transporter rail car which rides along the truss structure.

 Astronauts Replace Backup Computer During Spacewalk

Read about the S0 Truss and the Integrated Truss Structure: http://www.nasa.gov/mission_pages/station/structure/elements/its.html

Swanson and Mastracchio installed a spare MDM that was housed inside the Destiny lab since April 2001 when it was delivered aboard space shuttle Endeavour. They removed the failed MDM from the S0 truss where it has been located since the truss was delivered with the MDM already inside in April 2002. The station houses 45 MDMs, 24 internally and 21 externally.


Image above: NASA spacewalkers Rock Mastracchio and Steve Swanson. Image Credit: NASA TV.

Station and SpaceX managers decided the computer failure wouldn’t impact Sunday’s arrival of the Dragon commercial cargo craft on the SpaceX-3 mission. After an engineering review of the station’s systems it was determined the station had enough redundancy for SpaceX-3 to begin its mission when it launched Friday afternoon aboard a Falcon 9 rocket.

A few hours earlier today an ISS Progress 53 resupply ship undocked from the Zvezda service module. It will back up about 311 miles from the space station so Russian mission controllers can test its upgraded Kurs automated rendezvous system. The Progress will redock again Friday at 8:15 a.m. to the Zvezda service module after the Kurs tests are complete.

For more information about the International Space Station (ISS), visit: http://www.nasa.gov/mission_pages/station/main/index.html

Images (mentioned), Video, Text, Credits: NASA / NASA TV.

Greetings, Orbiter.ch

Undocking of Progress M-21M For Free-Flying Kurs-NA Test











ROSCOSMOS - Russian Vehicles patch.

April 23, 2014

 The Russian spacecraft Progress undocked from the ISS and went to the free flight test

An unmanned Russian re-supply vehicle, Progress M-21M, successfully undocked from the International Space Station today at 08:58 UTC on April 23rd 2014.

 Undocking of Progress M-21M For Free-Flying Kurs-NA Test

The craft will spend two days testing a new Kurs-NA system that performs the automated approach and docking to the complex. Progress M-21M will then redock with the orbiting laboratory on April 25th.

ROSCOSMOS Press Release: http://www.federalspace.ru/20479/

Image, Video, Text, Credits: ROSCOSMOS / NASA TV / Orbiter.ch Aerospace.

Cheers, Orbiter.ch

mardi 22 avril 2014

Crew Set to Conduct Spacewalk and Release Cargo Ship












ISS - Expedition 39 Mission patch.

April 22, 2014

Expedition 39 is finalizing preparations for a 2.5 hour spacewalk scheduled to begin 9:20 a.m. EDT Wednesday. The station crew is also getting ready to send off a Russian space freighter for two days of tests before it redocks again Friday morning.

Spacewalkers Steve Swanson and Rick Mastracchio will install a spare backup computer on the S0 truss located on top of the Destiny laboratory module Wednesday morning. They will remove the old computer which failed April 11 after being shut down then restarted for a periodic health check.

Read more about Wednesday's spacewalk: http://www.nasa.gov/press/2014/april/nasa-sets-preview-briefing-tv-schedule-for-space-station-spacewalk/

The duo was joined by Commander Koichi Wakata for a short spacewalk procedure conference. The trio also set up the Quest airlock, where they will stage their excursion, and readied spacewalk tools.


Image above: Steve Swanson works on a rack inside the Kibo laboratory. Image Credit: NASA TV.

Known as a Multiplexer/Demultiplexer (MDM), the backup computer provides telemetry and commands to truss systems, solar alpha rotary joints and the Mobile Transporter rail car which rides along the truss structure. Both MDMs have been at the International Space Station for over 10 years.

There are 45 MDMs throughout the space station. There are 24 inside the orbital laboratory and 21 located externally.

Before Wednesday’s spacewalk, an ISS Progress 53 resupply ship will undock from the Zvezda service module at 4:58 a.m. It will back away about 311 miles from the space station. It will return back to the Zvezda docking port Friday morning after Russian flight controllers have tested its new Kurs automated rendezvous system.

Flight Engineer Mikhail Tyurin closed the hatches to the Progress Tuesday morning and conducted leak checks. He also set up video gear to record its undocking, separation and eventual re-rendezvous and redocking to the station.

Earth Day Greetings from the ISS

Video above: The crew of the International Space Station send their greetings to everyone around the world on Earth Day, April 22, 2014. Video Credit ; NASA Tv.

The last time a Progress cargo freighter pulled away from the station and redocked was in July 2012. The ISS Progress 47 space freighter undocked from the Pirs docking compartment for eight days of testing before redocking to the same port. Russian flight controllers were also testing its new Kurs automated rendezvous system.

Cosmonauts Alexander Skvortsov and Oleg Artemyev worked throughout the station’s Russian segment on a host of science and maintenance tasks Tuesday. They performed light plumbing work, checked air ducts and adjusted a gas analyzer. Science work included observing the veins of a crew member’s legs, studying macroparticles in a magnetic field and Earth observations.

For more information about the International Space Station (ISS), visit: http://www.nasa.gov/mission_pages/station/main/index.html

Image (mentioned), Video (mentioned), Text, Credits: NASA.

Cheers, Orbiter.ch

Unique pair of hidden black holes discovered by XMM-Newton












ESA - XMM-Newton Mission patch.

22 April 2014

A pair of supermassive black holes in orbit around one another have been spotted by XMM-Newton. This is the first time such a pair have been seen in an ordinary galaxy. They were discovered because they ripped apart a star when the space observatory happened to be looking in their direction.

Most massive galaxies in the Universe are thought to harbour at least one supermassive black hole at their centre. Two supermassive black holes are the smoking gun that the galaxy has merged with another. Thus, finding binary supermassive black holes can tell astronomers about how galaxies evolved into their present-day shapes and sizes.

To date, only a few candidates for close binary supermassive black holes have been found. All are in active galaxies where they are constantly ripping gas clouds apart, in the prelude to crushing them out of existence.

Binary supermassive black hole system

Image above: Artist's impression of a binary supermassive black hole system. Credit: ESA / C. Carreau.

In the process of destruction, the gas is heated so much that it shines at many wavelengths, including X-rays. This gives the galaxy an unusually bright centre, and leads to it being called active. The new discovery, reported by Fukun Liu, Peking University, Beijing, China, and colleagues, is important because it is the first to be found in a galaxy that is not active.

"There might be a whole population of quiescent galaxies that host binary black holes in their centres," says co-author Stefanie Komossa, Max-Planck-Institut für Radioastronomie, Bonn, Germany. But finding them is a difficult task because in quiescent galaxies, there are no gas clouds feeding the black holes, and so the cores of these galaxies are truly dark.

The only hope that the astronomers have is to be looking in the right direction at the moment one of the black holes goes to work, and rips a star to pieces. Such an occurrence is called a 'tidal disruption event'. As the star is pulled apart by the gravity of the black hole, it gives out a flare of X-rays.

In an active galaxy, the black hole is continuously fed by gas clouds. In a quiescent galaxy, the black hole is fed by tidal disruption events that occur sporadically and are impossible to predict. So, to increase the chances of catching such an event, researchers use ESA's X-ray observatory, XMM-Newton, in a novel way.

Usually, the observatory collects data from designated targets, one at a time. Once it completes an observation, it slews to the next. The trick is that during this movement, XMM-Newton keeps the instruments turned on and recording. Effectively this surveys the sky in a random pattern, producing data that can be analysed for unknown or unexpected sources of X-rays.

XMM-Newton X-ray slew tracks

Image above: XMM-Newton slew scans (2001-2010). Credit: ESA/ A. Read (University of Leicester).

On 10 June 2010, a tidal disruption event was spotted by XMM-Newton in galaxy SDSS J120136.02+300305.5. Komossa and colleagues were scanning the data for such events and scheduled follow-up observations just days later with XMM-Newton and NASA's Swift satellite.

The galaxy was still spilling X-rays into space. It looked exactly like a tidal disruption event caused by a supermassive black hole but as they tracked the slowly fading emission day after day something strange happened.

The X-rays fell below detectable levels between days 27 and 48 after the discovery. Then they re-appeared and continued to follow a more expected fading rate, as if nothing had happened.

Now, thanks to Fukun Liu, the behaviour can be explained. "This is exactly what you would expect from a pair of supermassive black holes orbiting one another," says Liu.

Liu had been working on models of black hole binary systems that predicted a sudden plunge to darkness and then the recovery because the gravity of one of the black holes disrupted the flow of gas onto the other, temporarily depriving it of fuel to fire the X-ray flare. He found that two possible configurations were possible to reproduce the observations of J120136.

In the first, the primary black hole contained 10 million solar masses and was orbited by a black hole of about a million solar masses in an elliptical orbit. In the second solution, the primary black hole was about a million solar masses and in a circular orbit.

In both cases, the separation between the black holes was relatively small: 0.6 milliparsecs, or about 2 thousandths of a light year. This is about the width of our Solar System.

Being this close, the fate of this newly discovered black hole pair is sealed. They will radiate their orbital energy away, gradually spiralling together, until in about two million years time they will merge into a single black hole.

XMM-Newton X-ray Observatory. Image Credit: ESA

Now that astronomers have found this first candidate for a binary black hole in a quiescent galaxy, the search is inevitably on for more. XMM-Newton will continue its slew survey. This detection will also spur interest in a network of telescopes that search the whole sky for tidal disruption events.

"Once we have detected thousands of tidal disruption events, we can begin to extract reliable statistics about the rate at which galaxies merge," says Komossa.

There is another hope for the future as well. When binary black holes merge, they are predicted to release a massive burst of energy into the Universe but not mostly in X-rays. "The final merger is expected to be the strongest source of gravitational waves in the Universe," says Liu.

Gravitational waves are ripples in the space-time continuum. Astronomers around the world are currently building a new type of observatory to detect these ripples. ESA are also involved in opening this new window on the Universe. In 2015, ESA will launch LISA Pathfinder, which will test the necessary technology for building a space-based gravitational wave detector that must be placed in space. The search for elusive gravitational waves is also the theme for one of ESA's next large science missions, the L3 mission in the Cosmic Vision programme.

In the meantime, XMM-Newton will continue to look out for the tidal disruption events that betray the presence of binary supermassive black holes candidates.

"The innovative use of XMM-Newton's slew observations made the detection of this binary supermassive black hole system possible," says Norbert Schartel, ESA's XMM-Newton Project Scientist. "This demonstrates the import role that long-lasting space observatories have in detecting rare events that can potentially open new areas in astronomy."

Background Information

The results described in this article are reported in "A milli-parsec supermassive black hole binary candidate in the galaxy SDSS J120136.02+300305.5", by F.K. Liu, Shuo Li, and S. Komossa, published in the May 10 issue of The Astrophysical Journal, 2014, Volume 786; doi:10.1088/0004-637X/786/2/103

The European Space Agency's X-ray Multi-Mirror Mission, XMM-Newton, was launched in December 1999. It is the biggest scientific satellite to have been built in Europe and uses over 170 wafer-thin cylindrical mirrors spread over three high throughput X-ray telescopes. Its mirrors are among the most powerful ever developed. XMM-Newton's orbit takes it almost a third of the way to the Moon, allowing for long, uninterrupted views of celestial objects.

Related links:

For more information about XMM-Newton Mission, visit: http://www.esa.int/Our_Activities/Space_Science/XMM-Newton_overview and http://sci.esa.int/xmm-newton/

LISA Pathfinder: http://sci.esa.int/lisa-pathfinder/

Report on science themes for the L2 and L3 missions: http://sci.esa.int/cosmic-vision/53261-report-on-science-themes-for-the-l2-and-l3-missions/

Related Publications:

Liu, F.K., et al. [2014] preprint: http://sci.esa.int/xmm-newton/53988-liu-et-al-2014/

Images (mentioned), Text, Credit: ESA / ESA XMM-Newton Project Scientist /  Norbert Schartel / Max-Planck-Institut für Radioastronomie / Stefanie Komossa / Department of Astronomy Peking University / Fukun Liu.

Greetings, Orbiter.ch

lundi 21 avril 2014

CERN - LHCb confirms existence of exotic hadrons












CERN - European Organization for Nuclear Research logo.

April 22, 2014

The Large Hadron Collider beauty (LHCb) collaboration today announced results that confirm the existence of exotic hadrons – a type of matter that cannot be classified within the traditional quark model.

Hadrons are subatomic particles that can take part in the strong interaction – the force that binds protons inside the nuclei of atoms. Physicists have theorized since the 1960s, and ample experimental evidence since has confirmed, that hadrons are made up of quarks and antiquarks that determine their properties. A subset of hadrons, called mesons, is formed from quark-antiquark pairs, while the rest – baryons – are made up of three quarks.

But since it was first proposed physicists have found several particles that do not fit into this model of hadron structure. Now the LHCb collaboration has published an unambiguous observation of an exotic particle – the Z(4430) – that does not fit the quark model.


Image above: A view of the LHCb experiment at underground Point 8 on the Large Hadron Collider (LHC). The prominent tube is the LHC beam pipe, in which protons circulate at close to the speed of light (Image: Anna Pantelia/CERN).

The Belle Collaboration reported the first evidence for the Z(4430) in 2008. They found a tantalizing peak in the mass distribution of particles that result from the decays of B mesons. Belle later confirmed the existence of the Z(4430) with a significance of 5.2 sigma on the scale that particle physicists use to describe the certainty of a result.

LHCb reports a more detailed measurement of the Z(4430) that confirms that it is unambiguously a particle, and a long-sought exotic hadron at that. They analysed more than 25,000 decays of B mesons selected from data from 180 trillion (180 ×1012) proton-proton collisions in the Large Hadron Collider.


Video above: LHCb spokesperson Pierluigi Campana and LHCb physicist Richard Jacobsson discuss the unambiguous observation of an exotic particle which cannot be classified within the traditional quark model (Video: CERN).

"The significance of the Z (4430) signal is overwhelming – at least 13.9 sigma – confirming the existence of this state," says LHCb spokesperson Pierluigi Campana. "The LHCb analysis establishes the resonant nature of the observed structure, proving that this is really a particle, and not some special feature of the data."

Read more:

"Unambiguous observation of an exotic particle which cannot be classified within the traditional quark model" – LHCb public page: http://lhcb-public.web.cern.ch/lhcb-public/

"Major harvest of four-leaf clover" – Quantum Diaries blog by Pauline Gagnon: http://www.quantumdiaries.org/2014/04/09/major-harvest-of-four-leaf-clover/

Note:

CERN, the European Organization for Nuclear Research, is the world's leading laboratory for particle physics. It has its headquarters in Geneva. At present, its Member States are Austria, Belgium, Bulgaria, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Italy, the Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Romania is a candidate for accession. Israel is an Associate Member in the pre-stage to Membership. India, Japan, the Russian Federation, the United States of America, Turkey, the European Commission and UNESCO have Observer status.

Related links:

The Large Hadron Collider beauty (LHCb): http://home.web.cern.ch/about/experiments/lhcb

The Belle Collaboration: http://belle.kek.jp/

The Large Hadron Collider (LHC): http://home.web.cern.ch/topics/large-hadron-collider

Image (mentioned), Video (mentioned), Text, Credits: CERN / Cian O'Luanaigh.

Greetings, Orbiter.ch

dimanche 20 avril 2014

New fighter aircraft for the Swiss Air Force, the people will decide on may 18












Swiss Air Force logo.

April 20, 2014

I will not repeat the comparative of the Gripen, I've done in my previous articles, I also mentioned my doubts about the competence of the Minister of Defense, but it crossed the red line at having a totalitarian and anti-democratic behavior with pressure on the headquarters of the Swiss Army and lies repeatedly.

I remind my readers that Mr. Maurer is part of the xenophobic far right party (UDC) which originally initiatives against foreigners and against the European Union.

On these skills, Mr. Maurer is an accountant graduate, but I find that even in this area it is bad, because the total amount of the purchase of Gripen will not be 3.5 billion, but cost more than 10 billion Swiss francs.

A clause in the agreements signed with Saab (Gripen manufacturer) that Switzerland will participate in development costs for the Gripen (the model does not exist, except on paper).

For those who wonder what the Minister of Defence as interest in this matter? It's simple: Mr. Maurer to a disastrous record that in his department, he put the kao in the Swiss Army, his goal is to finish his current term with a successful record, he is afraid to end up like President his party (C. Blocher) to get out through the back door of the Federal Palace, it relies on the folder for the Gripen announced positive results of its mandate to seek re-election in 2015, officers are to disgust Minister right that does more damage to his department in four years that 30 years of GSSA propaganda (Group for a Switzerland without Army, left side association).

May 18 next, the Swiss people will vote against funding the Gripen, it will remind Minister that we are in Switzerland a direct democracy, that the people are sovereign (Switzerland Constitution) and Mr. Maurer is an executive representative of it (personally it does not represent me).


Image above: In August 2008, on the twenty-six test flights carried out by the Swiss Army, the Gripen landed four times with reserve fuel below the minimum level of security. Image Credit: DR.

Of the 98 improvements required by Switzerland , only 7 have been installed on the prototype of the future Gripen tested. The aircraft may not be delivered until 2023 and weaknesses remain as challenging procedures to protect the Swiss airspace.

Reminder, the mission of Wednesday, August 13, 2008 promised yet simple. An airplane flies north of the Alps towards the Ticino and is the intercept. To do this, the evaluation team placed the Gripen D registered 39-822 alert on the military base of Sion (VS). The tarmac is dry, it's big beautiful . The controls of the fighter , the Swiss test pilot Peter Merz, alias "Pablo"; behind him, the Saab Gripen manufacturer, to ensure that everything goes smoothly. After taking off as planned, the Swedish plane flies at supersonic speed to stabilize at Mach 1.42. But suddenly, in the middle approach phase "Bingo Fuel"! The LED alarm fuel placed on the left of the cockpit shows the need abort the mission and return to base.

Gripen arrived barely in contact with the F/A-18 to intercept, but was unable to intervene and had to land in Emmen (LU). The ground, the Swiss Air Force Chief Markus Gygax is stunned: excluded to buy such a flying pan. In comparison, the French Rafale , tested under the same conditions two months later, has made the interception, returned to Zion, and has been able to achieve another successful year. Of the twenty-six test performed at the time by the Gripen flight, the plane landed four times with reserve fuel below the minimum level of security.

The Defence Minister Ueli Maurer swears he will not buy the Gripen then, but an improved version: the Gripen E/F. Its engine is 33% more powerful, it has a completely redesigned electronics board can carry more weapons and especially ... 46% more fuel. To Defence Minister, there is no problem: it's a bit "like one tuning a car", he likes to say (further proof of his imcopétence in this area).

Tests for the gallery Unfortunately, not everything is so simple. Orbiter.ch Aerospace has obtained a list of 98 improvements. It was given to us by an employee of the federal government, and we have it validated by three sources of aerospace. Contacted by the media, the Department of Defense does not want her to take a position on this list confidential part.

At this stage, only six of these upgrades were tested in flight. The rest is either a prototype or even on planes. Gripen NG Demonstrator - the plane is supposed to prove the feasibility of future enhancements device - is certainly equipped with the new General Electric F414G reactor, but it does not have the new wings. Redrawn on the computer, a few centimeters thicker, they will accommodate a few percent of additional kerosene, plus three large drop tanks of 450 gallons (1700 liters). During flight tests made ​​from 2 to 4 May in Linköping, Sweden, the Swiss delegation had just wanted to test at least the famous tanks. Because they are essential to achieve sufficient autonomy surveillance zone, task force assumes example at the Forum in Davos. But in the end, "people of Saab refused", says one of our sources. With three external tanks, the aircraft would have been too constrained. "There was no need for tanks 450 gallons for missions", retorted the spokesman Kaj-Gunnar Sievert from Armasuisse.

The Rafale, the only fighter who spent all the tests to successfully. Image Credit: Dassault Aviation

Despite this less weight, the Armasuisse test pilot Bernhard Berset failed to exceed Mach 1.34, according to our informant. It must be said that the reactor, which will allow the aircraft to reach Mach 2.0, could be pushed only three-quarters of its ability, the air inlets of the Gripen NG has not yet been enlarged. The constraints faced by Swiss pilots were able to submit the aircraft was limited on many other points. And new AMRAAM missiles mounted IRST and the aircraft were in reality as hoaxes. Real missiles themselves are far from being operational.

"It's like a new car if they tried, but the mechanic told you that you do not have the right to exceed 80 Km/h ?, or take turns too tight ... and as for the new radio with GPS, you will board in six years, "laments one of our sources. But essentially Linköping was not to test the aircraft. Rather, it was to do well in the media: some tests that should be conducted during the fourth flight was even sacrificed for a new photo shoot. Images taken on the previous flight, breath our informant, were not beautiful enough.

Overwhelming evidence of Gripen NG does not have either the new radar, which would increase to 200 kilos front of the camera and would nosedive. "For the host, it will lengthen the future Gripen E/F 37 Centimeters", says Björn Danielsson, Swedish former military pilot, now a consultant at Saab. Clearly, we must build a new plane. So, the exercise has nothing to do with the tuning announced by Ueli Maurer. "Rather than modifying old Gripen C/D, it is much more efficient to build all new devices," and admitted Jürg Weber, head of the replacement project Tigers (TTE) in Armasuisse. It was on February 21, before the Subcommittee of the security policy to investigate the subject. Fifteen frames of the Department of Defence (DDPS) there are already cast. The minutes of the hearings were circulated within the administration and the medias could see them.

They highlight the inaccuracies of defense minister since the publication of our paper two confidential reports of the Air Force on February 12, which unveiled the poor performance of the Gripen, even with 98 upgrades . At a press conference on February 14, Ueli Maurer, for example, had argued that these documents were "completely dated. Since then, several officials have countered this statement to ensure before the House Subcommittee that "these reports are only valid". And the qualities of future Gripen are still to be demonstrated. "There is nothing in these reports that can support the decision", for example, stated at the hearing on April 3 Gérald Levrat, chief engineer of the team of Air Force operational assessment. Air Force which, as we know, have recommended the Rafale, Eurofighter with as an alternative. Hearings before the Subcommittee have shown that the planning staff of the army, as the direction of the project TTE in Armasuisse , also proposed the Rafale and the Eurofighter. In fact, it is obviously after intense discussions with subordinates Jürg Weber finally "decided to accept the Gripen", according to his own words. Claim, as did Ueli Maurer, the entire army rallied behind this third choice simply does not correspond to reality.

Worse than the performance of the F/A-18,  the Gripen including in its future version E/F will remain in effect very "average", according to statements by Gérald Levrat before parliamentary "A bit like a knife that does not cut well. You can cut a string, but if it's harder, we'll make it harder". In his fourth appearance before the Subcommittee, 24 April 2012, the project TTE leader Jürg Weber, meanwhile, has finally conceded that weaknesses in the Gripen require "perhaps a change of doctrine commitment".

When today off from Payerne F/A-18 and fly at full power to Davos , he still has enough fuel to intervene on site. "With the Gripen , it can become tight , admitted Jürg Weber [...] And maybe it will patrol continuously over Davos to be able to intervene. "But, according to him, we might find solutions in order to fulfill this reasonably air policing mission", although it will not be as effectively as other aircraft or the F/A-18".

In addition to significant risks performance below the F/A-18 - fifteen years old - the Gripen E/F has a very important industrial risk. The chief engineer Gerald Levrat thirty years of experience in the aerospace test equipment, explained in clear terms: "In general, the seller ensures that deliver the best possible equipment. But there is always a gap between what we wanted and what we receive".


Image above: Caricature of the Swiss Minister of Defence: The model of Gripen would have evolved, it to a cigarette lighter! Credit not specified.

The Gripen E/F, has he confirmed, 70 % of the components are new. During development, problems can arise. Requirements may have been misunderstood, a bug can be accidentally introduced by a programmer, the manufacturer may refuse certain changes to avoid cost overruns.

"Saab has offered a fixed price" say in unison DDPS officials, thus affirming that the financial risk does not exist. Unfortunately, this warranty is not insurance against all risks. For the record, the aircraft A400M European military transport had also been sold at a fixed price. But soon the problems of development have emerged. After the renegotiation of contracts, the additional cost has now reached 38% and behind the initial schedule is four years.

Delays, precisely, are virtually assured with the Gripen. According to current planning, which has been postponed for two years, twenty-two jets should be delivered from 2018. But at the rate things are going, Saab may delay the delivery of the first Gripen E/F "in accordance with this was asked in 2020 or 2023", said Gerald Levrat before the parliamentary sub-committee.

Start from scratch According Frieder Fallscheer in charge of Air Force systems in staff planning, if the commitments were not being held, "the process of selecting a fighter could start from scratch", has he released before the subcommittee.

What annoys most the Swiss people is the Saab interference in this case, apparently the Swedes understood nothing of our direct democracy, they work all round lobby, is very badly perceived by the citizens of Switzerland. Other manufacturers know them, stay in their place without making propaganda or interferences.

And to finish this article apotheosis, here are copies of the test papers of three fighter aircraft tested by the Swiss Air Force (that Maurer tried to hide) you will find that the only aircraft that brilliantly passed all tests is the Dassault Aviation Rafale, the Gripen has passed some tests specifications of the department of Defense, complete failure, this is the worst test.

My previous articles:

Choice of a new fighter aircraft of the Swiss Air Force: Description and comparison: http://orbiterchspacenews.blogspot.ch/2013/01/choice-of-new-fighter-aircraft-of-swiss.html

Swiss Air Force - The Gripen saga continues ...: http://orbiterchspacenews.blogspot.ch/2013/02/swiss-air-force-gripen-saga-continues.html

Patrouille Suisse: a boss flies to the rescue: http://orbiterchspacenews.blogspot.ch/2013/02/patrouille-suisse-boss-flies-to-rescue.html

The Patrouille Suisse will continue to exist: http://orbiterchspacenews.blogspot.ch/2013/02/the-patrouille-suisse-will-continue-to.html

No F/A-18 outside office hours: http://orbiterchspacenews.blogspot.ch/2014/02/no-fa-18-outside-office-hours.html

Images (mentioned), Text, Credit: Orbiter.ch Aerospace.

Best regards, Orbiter.ch

Crew Berths SpaceX Dragon at ISS












SpaceX - Dragon CRS-3 Mission patch.

April 20, 2014

Dragon berthed at ISS. Image Credit: NASA TV

ISS Commander Koichi Wakata of the Japan Aerospace Exploration Agency, with the assistance of NASA’s Rick Mastracchio, successfully berthed the SpaceX Dragon spacecraft at the space station at 9:06 a.m. EDT. The mission is the company's third cargo delivery flight to the station. Dragon's cargo will support more than 150 experiments to be conducted by the crews of ISS Expeditions 39 and 40.

The scientific payloads on Dragon include investigations that focus on efficient ways to grow plants in space, demonstrating laser optics to communicate with Earth, human immune system function in microgravity and Earth observation. Also being delivered is a set of high-tech legs for Robonaut 2, which can provide the humanoid robot torso already aboard the orbiting laboratory with the mobility it needs to help with regular and repetitive tasks inside the space station.


Video above: SpaceX Dragon Ship Arrives at the International Space Station with Important cargo. Video Credit: NASA TV.

Dragon also will deliver the second set of investigations sponsored by the Center for the Advancement of Science in Space (CASIS), which manages the portion of the space station designated a U.S. National Laboratory. CASIS investigations on Dragon are part of the organization's initial suite of supported payloads linked to Advancing Research Knowledge 1, or ARK 1. The investigations include research on protein crystal growth, which may lead to drug development through protein mapping, and plant biology.

Read about science aboard SpaceX-3: http://www.nasa.gov/mission_pages/station/research/news/spacex_third_mission/

Skvortsov also teamed up with Flight Engineer Oleg Artemyev to unload items from the ISS Progress 53 cargo craft docked at the aft port of Zvezda.  Progress 53 is set to undock from the station on Wednesday, April 23, at 4:54 a.m. to test its Kurs automated rendezvous equipment. The vehicle will redock with Zvezda on April 25 at 8:16 a.m. Progress 53 delivered 2.9 tons of food, fuel and supplies to the station on Nov. 29 following a four-day journey that included a “flyby” of the station to test a new lighter, revamped Kurs system .

And after 11 days of free flight for engineering tests, the Russian ISS Progress 54 cargo ship, now loaded with trash from the station, was commanded to deorbit for its fiery entry into the Earth’s atmosphere for disposal.  The deorbit burn at 10:52 a.m. sent the cargo craft on a course for atmospheric entry over the Pacific Ocean at 11:32 a.m.

For more information about the International Space Station (ISS), visit: http://www.nasa.gov/mission_pages/station/main/index.html

Image, Video, Text, Credits: NASA / NASA TV.

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