Tag: spaceflight

Manned Soyuz launch delayed

3:50 pm

More Russian quality control issues? The next manned launch to ISS has been delayed for a week because of an issue with the capsule’s control thrusters.

The article is lacking in any details, though it appears that the Soyuz capsule’s system for controlling its roll is the source of the problem. This issue, on top of the fact that the most recent Soyuz rocket launch last week had an unexplained premature engine shutdown, should make everyone a bit nervous about the reliability and safety of the Russian manned system.

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Airbus Safran begin Ariane 6 engine tests

9:18 pm

The competition heats up: In its effort to build Ariane 6 by 2020, Airbus Safran has begun testing of that rocket’s upper stage Vinci engine.

This test phase, set to last until September, will include running the engine repeatedly as well as for as long as 1,000 seconds. Once they have determined the engine’s design, behavior, and overall thrust, they will be able to design and build the upper stage.

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Orbital ATK successfully completes Antares test fire

9:07 pm

The competition heats up: Orbital ATK today successfully completed a 30 second test fire of the first stage of its redesigned Antares rocket, using new Russian rocket engines.

The primary goal of the test was to verify the functionality of the integrated first stage, including new engines, modified Stage 1 core, avionics, thrust vector control and pad fueling systems in an operational environment. During the test, a number of operational milestones were met including full propellant loading sequence, launch countdown and engine ignition and shut down commands, as well as multiple throttle settings including full engine power. The test also validated the launch pad’s operation, including propellant tanking and the use of the water deluge system to protect the pad from damage and for noise suppression.

Orbital ATK will now purge and clean the engines of residual propellants and return the first stage used in this test to the Horizontal Integration Facility for full reconditioning prior to its use on the OA-7 mission slated for later this year. The Orbital ATK team will continue to prepare the Antares rocket that will launch the OA-5 mission, which is in the final stages of integration, systems testing and check-out in preparation for launch this summer.

They hope to launch a Cygnus capsule on Antares around July 6.

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Rosetta almost lost during weekend

8:55 am

Because Rosetta’s star tracker became confused by dust particles, the spacecraft lost contact with Earth, went into safe mode, and required the entire weekend for engineers to regain control.

“We lost contact with the spacecraft on Saturday evening for nearly 24 hours,” says Patrick Martin, ESA’s Rosetta mission manager. “Preliminary analysis by our flight dynamics team suggests that the star trackers locked on to a false star – that is, they were confused by comet dust close to the comet, as has been experienced before in the mission.” This led to spacecraft pointing errors, which triggered the safe mode. Unfortunately the star trackers then got hung in a particular sub mode requiring specific action from Earth to recover the spacecraft.

“It was an extremely dramatic weekend,” says Sylvain Lodiot, ESA’s Rosetta spacecraft operations manager.”

The spacecraft has been diving to within only a few miles of the surface of Comet 67P/C-G, which means it is flying close to the comet’s coma. The increased dust in that region has confused the star tracker in the past, but this appears to have been the most serious event yet.

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Premature engine cutoff on Soyuz upper stage

9:20 am

During a successful Soyuz rocket launch of a Russian Glonass GPS satellite last week, it appears that the engine for the rocket’s upper stage cut off prematurely, requiring the third stage to fire longer to get the satellite into its proper orbit.

This scenario is almost identical to what happened with the most recent Atlas 5 launch. There is as yet no word on why it happened, or if the Russians plan to investigate it.

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XCOR layoffs, ending Lynx?

8:25 am

In the heat of competition: XCOR has laid off the staff working on its Lynx suborbital spaceplane.

The company has apparently decided to focus on those things that are generating revenues. Lynx was years behind schedule, unfinished with no prospect for profit, as it was only a prototype, not the spaceplane that could be used to fly tourists.

As much as I am not surprised (I have been skeptical of XCOR’s Lynx suborbital project since they announced it in 2008), I am saddened, because I really did want them to succeed.

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NASA to try module expansion again on Saturday

9:53 pm

NASA will try again on Saturday to expand the privately built BEAM module on ISS.

They think the reason the module didn’t inflate as planned the first time is because it has been packed ready for launch for more than fifteen months, ten months longer than originally planned.

That extra time in a tight squeeze might explain why the first inflation attempt didn’t go as planned. BEAM’s Kevlar-like fabric “layers have a memory to them,” Lisa Kauke, BEAM deputy program manager at Bigelow Aerospace, said during today’s teleconference. “The longer they’re packed, the more they’re compressed, and then it takes a little while for the shape to return.” This interpretation is bolstered by the fact that BEAM continued to expand overnight Thursday into Friday morning, even though no more air was being pumped in, Crusan said.

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Rosetta finds organic compounds at Comet 67P/C-G

12:18 pm

Rosetta’s scientists have detected the amino acid glycine as well as other organic molecules in the atmosphere of Comet 67P/C-G.

Glycine is very hard to detect due to its non-reactive nature: it sublimates at slightly below 150°C, meaning that little is released as gas from the comet’s surface or subsurface due to its cold temperatures. “We see a strong correlation of glycine to dust, suggesting that it is probably released from the grains’ icy mantles once they have warmed up in the coma, perhaps together with other volatiles,” says Altwegg. At the same time, the researchers also detected the organic molecules methylamine and ethylamine, which are precursors to forming glycine. Unlike other amino acids, glycine is the only one that has been shown to be able to form without liquid water. “The simultaneous presence of methylamine and ethylamine, and the correlation between dust and glycine, also hints at how the glycine was formed”, says Altwegg.

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New Horizons’ best Pluto close-up

11:29 am

Pitted nitrogen ice plains on Pluto

The New Horizons science team has released the highest resolution image across Pluto’s face, taken by the spacecraft during its flyby last year.

This mosaic strip, extending across the hemisphere that faced the New Horizons spacecraft as it flew past Pluto on July 14, 2015, now includes all of the highest-resolution images taken by the NASA probe. With a resolution of about 260 feet (80 meters) per pixel, the mosaic affords New Horizons scientists and the public the best opportunity to examine the fine details of the various types of terrain the mosaic covers, and determine the processes that formed and shaped them.

The view extends from the “limb” of Pluto at the top of the strip, almost to the “terminator” (or day/night line) in the southeast of the encounter hemisphere, seen at the bottom of the strip. The width of the strip ranges from more than 55 miles (90 kilometers) at its northern end to about 45 miles (75 kilometers) at its southern end. The perspective changes greatly along the strip: at its northern end, the view looks out horizontally across the surface, while at its southern end, the view looks straight down onto the surface.

Go to the full image, go to its top, center your browser on the image, and then pan down slowly to see it in all its glory. The image above is cropped from about two-thirds of the way down, about when the terrain is transitioning from what they call cellular nitrogen ice plains to pitted non-cellular nitrogen ice plains. It includes what looks like a cluster of cave pits on the left.

They have also provided a video which does the same as panning down yourself, but adds a scale and labeling.

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Microsoft and Facebook to lay Atlantic cable

8:33 am

Microsoft and Facebook have announced plans to lay a trans-Atlantic communications cable from Virginia to Spain.

Running from Virginia Beach, Virgina to Bilbao, Spain, MAREA (which is Spanish for “tide”), it will be the first cable to connect the US to southern Europe, over a distance of 6,600 km (4,100 miles). From Blibao, it will connect to network hubs in Europe, Africa, the Middle East and Asia, with the goal of improving speed and reliability. For Microsoft this means improvements for users of its cloud services, such as Bing, Office 365, Skype, Xbox Live, and Microsoft Azure, while for Facebook it means improvements for users of its eponymous social network.

I find this story very puzzling. The whole reason communication satellites exist is because they have historically been far cheaper to build and launch with far greater capacity than ocean cables. Thus, the decision of these companies to go with an undersea cable instead of satellites suggests that something has changed in that equation, though I can’t see what. Have undersea cables improved so much that they have a bigger capacity than satellites, so much bigger that it compensates for the higher cost of installation and maintenance?

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Planetary Resources has raised $21 million

10:44 am

The competition heats up: Planetary Resources, the company that claims its goal is to mine asteroids, has raised $21 million to build and launch an Earth resources satellite.

They plan to create a 10-satellite constellation to provide this data commercially.

While everything this company is doing will eventually make asteroid mining easier and more effective, nothing they are doing now has anything to do with mining asteroids. Their first project was to build a prototype orbiting telescope to look for asteroids. This second project will sell data about the Earth.

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Bigelow’s ISS module expansion halted

8:46 am

Engineers called a halt today to the expansion of Bigelow’s BEAM module on ISS when the procedure did not go as planned.

Originally, the plan was to use air from tanks located inside BEAM to inflate these bladders, however analysis showed that this could cause expansion to occur too fast and potentially place damagingly high loads on the ISS in the process, so instead the air will be supplied from the station in a more controlled manner. It was not actually known precisely how the inflation dynamics would occur, as it has only ever been done twice before (Genesis I and II), neither of which were viewable from external cameras such as those found on the ISS.

This proved to be a learning curve, as after two hours of adding a few seconds of air into the module, only the width expanded, as opposed to the length. Mission controllers decided it would be best to defer operations for the day to allow them to evaluate the next steps.

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Antares static engine test scheduled

4:30 pm

The 30-second static fire engine test of the Antares first stage and new Russian engine has now been scheduled for May 31.

The window for the engine test, or hot fire, is 5 p.m. to 8:15 p.m. EDT. Backup test dates run through June 5. Completion of the test will be noted on the Wallops’ Facebook and Twitter sites. During the test, the upgraded Antares dual RD-181 rocket engines will fire for 30 seconds at maximum 100% power (thrust) while the first stage of the test rocket will be held down on the pad. The hot fire will demonstrate the readiness of the rocket’s first stage and the launch pad fueling systems to support upcoming flights.

If all goes well, they hope to launch Antares with a Cygnus capsule in early July.

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Iridium announces its own alternative to GPS

3:46 pm

The competition heats up: Iridium has announced the availability of its own location technology comparable to GPS and using the company’s constellation of satellites.

Iridium Communications Inc. has introduced its Satellite Time and Location (STL) service, an alternative or complement to traditional indoor and outdoor location-based technologies, and declared it ready for use. STL’s position, navigation and timing (PNT) technology is deployed through Iridium’s 66 cross-linked, low-earth orbit satellite constellation. Through Iridium satellites and in GNSS receivers, STL technology can work to verify GPS, GLONASS, Galileo and other navigation services, and also can serve as an alternative for those services when GPS signals are degraded or unavailable. STL also can provide an alternative source of time when testing GPS signals.

Essentially, for practically nothing, using satellites and technology already in orbit, they have created their own system that can both compete and complement the expensive government-built GPS systems.

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House committee reshapes NASA budget

8:53 am

The House appropriations committee has outlined its recommendations for NASA’s 2017 budget.

Like the Senate the House is pushing more money for SLS and is demanding NASA use it to fly two missions to Europa in the early 2020s (likely delaying SLS’s first manned mission), In addition, the House wants NASA to abandon any plans for an asteroid mission and instead go back to the Moon. They also pumped up the planetary program, and express reservations about the manned commercial program.

Finally, in a wonderful example of congressional micro-managing, the committee ordered NASA to begin work on flying an interstellar mission to Alpha Centauri by the 100th anniversary of Apollo 11.

While some of the changes the committee is recommending (increasing planetary research funding for example) make sense, the overall priorities of Congress continue to appear to me to be misplaced. Their continuing emphasis on SLS while questioning commercial space illustrates their focus on pork rather than actual accomplishments. And their continuing effort to micromanage many NASA missions does not bode well for the success of those missions.

There is one takeaway from this House budget recommendation that most news sources are missing: The first manned flight of Orion is almost certainly not flying in 2021. I have seen numerous indicators in the past four months suggesting that NASA is going to delay it, and this budget recommendation’s insistence that NASA use SLS to fly Europa missions in 2022 and 2024 almost guarantees that delay.

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More weird Pluto geology

9:13 am

fretted terrain

Cool image time! The New Horizons science team has released an image taken during the spacecraft’s fly-by of Pluto in July 2015 showing what they are calling “fretted terrain”.

The image above is a cropped reduced section of that image. It shows the strange transition zone between the higher elevation bright areas and the lower dark plains. As they note,

New Horizons scientists haven’t seen this type of terrain anywhere else on Pluto; in fact, it’s rare terrain across the solar system – the only other well-known example of such being Noctis Labyrinthus on Mars. The distinct interconnected valley network was likely formed by extensional fracturing of Pluto’s surface. The valleys separating the blocks may then have been widened by movement of nitrogen ice glaciers, or flowing liquids, or possibly by ice sublimation at the block margins.

In other words, they really don’t know what is going on.

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United Kingdom cancels spaceport competition

8:29 am

The competition heats up: The United Kingdom has cancelled its spaceport competition to chose one spaceport and instead has announced it will allow any one of the competing locations to operate if they can want and can meet some licensing requirements.

In other words, instead of the government dictating one location as the nation’s spaceport, it will allow different locations to compete for the space launch business.

The link has few details, though a closer look at subject of the British space effort can be found here.

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India test flies its first spaceplane prototype

8:15 am

The competition heats up: India this morning successfully completed a test flight of its first spaceplane engineering prototype.

After a 90sec burn, the booster delivered the RLV-TD to the proper altitude before separating from the prototype and destructively fall back to Earth in the Bay of Bengal. Meanwhile, the RLV-TD continued on, falling back into Earth’s atmosphere at hypersonic velocity. During this hypersonic test, the RLV-TD pitched its nose up relative to the horizon and direction of travel – just as the Space Shuttles did during atmospheric entry. This allowed engineers to gather valuable in-flight data surrounding the performance of the vehicle’s thermal protection system (600 heat-resistant tiles and a carbon-carbon nose), its aerodynamic characteristics during hypersonic flight, and inform the overall design of the eventual full-scale RLV.

The prototype was designed to test the flight characteristics of the spaceplane, not its landing capabilities. If all went as planned, it would have glided horizontally into the ocean, as if it was landing on a runway, but then sink.

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