Tag: Mars

India begins tests of larger rocket engine

8:45 am

The competition heats up: Indian engineers have successfully completed their first tests of a new more powerful upper stage engine for their biggest launch rocket.

Taking a big step forward in the development of bigger and more powerful locally-built rocket engines, the Liquid Propulsion Systems Centre (LPSC) on Monday successfully conducted the first ‘cold flow test’ on the CE-20 cryogenic engine, which will power the upper stage of the Geosynchronous Satellite Launch Vehicle-Mk III (GSLV-Mk III). “It’s a milestone,” LPSC director Dr K Sivan told ‘Express’ here on Tuesday, confirming that the test had gone as planned at the LPSC facility in Mahendragiri, Tamil Nadu. The first ‘hot test’ – where the engine will be fired for a few seconds- will be performed in three weeks’ time, Sivan said.

In a cold test, the propellants are not ignited. On Monday, the fuel, Liquid Hydrogen (LH2), and the oxidiser, Liquid Oxygen (LOX), were injected into the chambers for the checking of various parameters.

In related news, Mangalyaan has taken another global view of Mars.

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Mars orbiters survive comet fly-by

9:56 pm

Press releases from science teams for Mars Reconnaissance Orbiter, MAVEN, and Mars Odyssey confirm that all three spacecraft are functioning properly after Comet Siding Spring’s fly-by of Mars today.

All three spacecraft also did observations of the fly-by, the data of which will take a few days to download. Stay tuned.

Update: Europe’s Mars Express and India’s Mangalyaan orbiters are also reported to have escaped damage during the fly-by.

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The X-37B goes to Mars

12:24 pm

After 675 days in space, the Air Force’s reusable X-37B mini-shuttle successfully returned to Earth today, completing its second flight in space.

There has been a lot of speculation about the secret payloads that the two X-37B’s have carried into space. The Air Force has been very tight-lipped about this, though they have said this:

“The primary objectives of the X-37B are twofold: reusable spacecraft technologies for America’s future in space, and operating experiments which can be returned to, and examined, on Earth,” Air Force officials wrote in on online X-37B fact sheet. “Technologies being tested in the program include advanced guidance, navigation and control; thermal protection systems; avionics; high-temperature structures and seals; conformal reusable insulation, lightweight electromechanical flight systems; and autonomous orbital flight, re-entry and landing,” they added.

The obvious advantage of the X-37B is that it allows the Air Force to test these new technologies in space, then bring them back to Earth for detailed analysis.

However, I think the most important engineering knowledge gained from this flight will not be from the payload, but from the X-37B itself.
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First results back from the U.S. MAVEN Mars probe

9:13 am

Scientists have released the first results from NASA’s MAVEN probe orbiting Mars, designed to study that planet’s upper atmosphere.

As expected, the spacecraft has quickly found evidence of the Martian atmosphere leaking away into space.

Hydrogen appears to be leaving the planet’s atmosphere in clumps and streams that reach about 10 Mars radii into space, said Mike Chaffin, a MAVEN scientist also at the University of Colorado, who discussed the results at a 14 October news briefing. The hydrogen comes from water vapour that breaks apart in the upper atmosphere; because hydrogen is so much lighter than oxygen, it escapes into space relatively easily. “That’s effectively removing water from the Martian atmosphere,” says Chaffin.

Other images show oxygen and carbon drifting away from the planet, although these heavier atoms cluster closer to Mars than hydrogen. Deep within the atmosphere, oxygen forms ozone molecules that accumulate near Mars’s south pole.

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Mangalyaan’s first global images of Mars

8:49 am

Indian engineers have released the first global images taken by Mangalyaan.

As MOM’s orbit is highly elliptical, reaching from 262 miles (periareon — closest approach) to 47,841 miles (apoareon — farthest extent), we can expect a lot more global views from Mars’ newest satellite, providing us with a beautiful global perspective of a planet that currently has seven robotic missions (from three different space agencies) exploring it.

These images suggest that a dust storm is beginning to stir on the Martian surface.

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Mangalyaan sends its first Mars pictures

9:15 am

Mangalyaan's first image of Mars

Indian engineers have posted Mangalyaan’s first image on the spacecraft’s Facebook and Twitter accounts, as well as presented the photo to their nation’s leader.

My first reaction when I looked at the image above was an immediate flashback to 1969, when the American probes Mariner 6 and Mariner 7 flew past Mars, taking images of its cratered southern hemisphere and thus making scientists think for several years that Mars was not much different than the Moon. The Indian image is of about the same quality, and shows lots of moon-like craters.

Image if this was the first close-up image of Mars anyone had ever seen. It would be very easy to assume that Mars is pockmarked with craters everywhere, just like the Moon.

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Why India’s Mars probe was so cheap

5:32 pm

Alan Boyle has some interesting thoughts on why it cost India so little, less than the budget of the movie Gravity, to build and send its probe Mangalyaan to Mars.

The $74 million Mars Orbiter Mission, also known by the acronym MOM or the Hindi word Mangalyaan (“Mars-Craft”), didn’t just cost less than the $100 million Hollywood blockbuster starring Sandra Bullock. The price tag is a mere one-ninth of the cost of NASA’s $671 million Maven mission, which also put its spacecraft into Mars orbit this week. The differential definitely hints at a new paradigm for space exploration — one that’s taking hold not only in Bangalore, but around the world. At the same time, it hints at the dramatically different objectives for MOM and Maven, and the dramatically different environments in which those missions took shape.

Read it all. It gives us a hint at the future of space exploration.

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Success for India’s Mars Orbiter Mission

8:33 am

The competition heats up: On Wednesday morning India’s Mars orbiter Mangalyaan successfully fired its engines and attained Mars orbit.

More here.

There are probably three dozen stories in the India press today extolling this success. And there should be. As described in detail in the second link above, India did this mission smart, simple, and fast, showing everyone else that a science mission doesn’t have to take a decade and a billion dollars to be get built.

I expect that this success will quickly lead to the Indian manned flight tests their space agency ISRO has been advocating for the past few years.

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MAVEN enters Mars orbit

7:25 pm

Upon completion of its engine burn this evening at 10:10 pm (eastern), MAVEN successfully entered Mars orbit.

Stephen Clark’s status updates on Spaceflight Now were accurate, informative, and right on the money. The live telecast on NASA-TV was confusing, idiotic, distracting, and uninformed. They never once announced when the engine burn had started, ignored the reactions of the people in the control room when they cheered some important event, and spent a lot of time discussing facts that were irrelevant to this event, which is “Will MAVEN achieve orbit!?” Worst of all, the male “anchor” was clearly ignorant of the mission while the female “anchor” spoke in a sing-song manner as if her audience were kindergarten toddlers who needed careful herding. All in all, it was embarrassing to watch.

They did manage to shut up just in time to catch the announcement from mission control that telemetry had confirmed that MAVEN had reached orbit. They then went back to chattering about irrelevant stuff. As I said, embarrassing.

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The competition in space continues to heat up

9:10 am

Two news stories today indicate that things are going to get increasingly interesting in the exploration of space in the coming years.

First there is this story from Joe Abbott of the Waco Tribune, who routinely reports on SpaceX news because their McGregor test facility is nearby. In it Abbott reports that SpaceX has scheduled its next Dragon supply mission to ISS for no early than September 20.

This news item however is not Abbott’s most interesting news. He also notes several twitter reports coming out a commercial satellite conference in Paris that indicate that SpaceX has closed 9 deals, including several more for its as yet unflown Falcon Heavy.

But even that is not the most interesting news. Abbott also reports that a replacement for the destroyed Falcon 9R test vehicle will be shipped to McGregor for testing in less than two months. Considering how long it takes governments to build and fly test vehicles, getting this replacement in shape for flight mere months after the failure a few weeks ago is quite impressive.

But even that was not Abbott’s most interesting SpaceX news item. » Read more

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Curiosity to begin climbing

12:29 pm

Scientists have decided to begin Curiosity’s climb of Mount Sharp immediately rather than continue a planned traverse along the base of the mountain prior to heading uphill.

Curiosity’s trek up the mountain will begin with an examination of the mountain’s lower slopes. The rover is starting this process at an entry point near an outcrop called Pahrump Hills, rather than continuing on to the previously-planned, further entry point known as Murray Buttes. Both entry points lay along a boundary where the southern base layer of the mountain meets crater-floor deposits washed down from the crater’s northern rim.

The issues with Curiosity’s wheels also played a part in this decision.

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Review panel approves extensions for seven planetary missions.

5:19 pm

In approving extensions of seven NASA planetary missions, a review panel concluded that the Curiosity rover wasn’t doing the best it could, and that the project scientist didn’t work hard enough to change their minds.

The Mars Science Laboratory’s Curiosity rover landed on the red planet in August 2012. Equipped with a drill to gather surface samples and spectroscopy equipment to analyze the samples, the rover has collected and analyzed five surface specimens so far and, according to the extended mission proposal just approved by NASA, would analyze another eight over the next two years. That is “a poor science return for such a large investment in a flagship mission,” a 15-person senior review panel chaired by Clive Neal, a geologist at the University of Notre Dame in South Bend, Indiana, wrote in a report published Sept. 3.

The report also chided John Grotzinger, the lead Curiosity project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California, for neglecting to show up in person during a Mars-focused senior review panel meeting in May. “This left the panel with the impression that the [Curiosity] team felt they were too big to fail,” the senior review panel wrote.

This sounds like a pissing war between scientists. Grotzinger didn’t give them the required deference so they slammed him. No matter happened, however, we know they weren’t going to cancel Curiosity’s funds.

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Opportunity to get a reboot

9:32 am

Because of an increasing number of computer resets on the Mars rover Opportunity, engineers plan to reformat the rover’s computer.

The resets, including a dozen this month, interfere with the rover’s planned science activities, even though recovery from each incident is completed within a day or two.

Flash memory retains data even when power is off. It is the type used for storing photos and songs on smart phones or digital cameras, among many other uses. Individual cells within a flash memory sector can wear out from repeated use. Reformatting clears the memory while identifying bad cells and flagging them to be avoided.

Obviously there is a risk, though small, that this action will not work and the mission will end here. Stay tuned.

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A problem with drilling on Mars

9:07 am

In drilling a new hole while scientists considered Curiosity’s future route to Mount Sharp, the drill cut off operations prematurely.

Engineers think that the rock might have shifted during drilling, causing the robot rover to abort. They have ordered the rover to take a lot of pictures of the situation so they can figure out what happened.

I should note that engineers take a large risk every time they use Curiosity’s drill, as the design of the rover’s electrical system is such that the drill might short everything out while it operates. Thus, when I see a story about a problem with any drilling operation, I become very concerned. In this case, however, it appears to not be a problem with the rover itself.

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Curiosity retreats from Hidden Valley

3:27 pm

Finding its sandy floor slipperier than expected, engineers have backed Curiosity out of Hidden Valley to drill some holes while they reassess the rover’s route.

The rover’s wheels slipped more in Hidden Valley’s sand than the team had expected based on experience with one of the mission’s test rovers driven on sand dunes in California. The valley is about the length of a football field and does not offer any navigable exits other than at the northeastern and southwestern ends. “We need to gain a better understanding of the interaction between the wheels and Martian sand ripples, and Hidden Valley is not a good location for experimenting,” said Curiosity Project Manager Jim Erickson of JPL. …

Curiosity reversed course and drove out of Hidden Valley northeastward. On the way toward gaining a good viewpoint to assess a possible alternative route north of the valley, it passed over the pale paving stones on the ramp again. Where a rover wheel cracked one of the rocks, it exposed bright interior material, possibly from mineral veins.

More and more, the journey to Mount Sharp appears to be increasingly adventurous for the rover.

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The next U.S. Mars rover will try to make and store oxygen

9:59 am

Of the seven science instruments proposed for the next U.S. Mars rover, scheduled for a 2020 launch date, MOXIE test the engineering to produce and store oxygen, pulled from the Martian atmosphere.

Developed in partnership with NASA’s Jet Propulsion Laboratory, it’s based on the fact that the Martian atmosphere, though extremely thin, is composed of 96 percent carbon dioxide, which means its a vast potential source of oxygen for future explorers and settlers. Essentially, MOXIE is a fuel cell in reverse. Instead of generating electricity by using oxygen to burn a fuel, it uses a process called solid oxide electrolysis , where electricity is employed to split carbon dioxide into oxygen and carbon monoxide.

This process would see Martian air pumped into the unit through a dust filter and pressurized before being passed into a fuel cell. At high temperatures, some ceramic oxides act as oxygen ion conductors. In the fuel cell, a thin, non-porous disc of this ceramic separates two porous electrodes. One electrode acts as the cathode and the other as the anode. Carbon dioxide passes through the cathode and when it comes into contact with the ceramic, the interaction of electricity and the ceramic causes the carbon dioxide to split into oxygen and carbon monoxide. The oxygen and the carbon monoxide are then separated and the oxygen stored.

What makes this unusual is that NASA has actually dedicated one science instrument to engineering research, not pure science. The agency does not do this much anymore, but such research is essential if the U.S. is going to someday send humans to other planets.

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ExoMars will likely miss 2018 launch date

9:06 am

Because of technical and financial issues the European/Russian ExoMars rover mission is expected to miss its 2018 launch window.

The main reason for the delay would be the ExoMars’ brand-new landing system, which is designed to safely take the rover through a fiery descent in the Martian atmosphere and then softly land it on the surface of the Red Planet.

In addition to its late development start, the landing system has a complicated share of responsibilities between Russia and Europe, which greatly slows down the work. For example, the overall landing system is being developed by NPO Lavochkin in Moscow, while its parachute system will be provided by Europe. Many other aspects of the mission are similarly intertwined.

To further complicate matters, NPO Lavochkin, which traditionally builds all Russian planetary probes, but also some of the highly classified military satellites, is notorious for its Soviet-style secrecy. As a result, it is harder for the two sides to coordinate the work, Europeans sources said. Finally, the translation of documents between Russian and English further delays the work on the project.

The program is also significantly over budget.

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Commercial communications satellites for Mars?

8:03 am

The competition heats up? NASA is considering a different commercial approach for providing communications to and from its Mars probes.

The purpose of NASA’s request for information, or RFI, released July 23 “is to explore new business models for how NASA might sustain Mars relay infrastructure, consisting of orbiters capable of providing standardized telecommunication services for rovers and landers on the Martian surface, in the Martian atmosphere, or in Mars orbit,” according to a posting on the Federal Business Opportunities website.

According to the post, NASA will use information it receives from respondents to inform its future Mars exploration strategies, but the agency has not decided to pursue a commercial interplanetary telecom initiative. “We are looking to broaden participation in the exploration of Mars to include new models for government and commercial partnerships,” said John Grunsfeld, associate administrator of NASA’s science mission directorate, in a statement. “Depending on the outcome, the new model could be a vital component in future science missions and the path for humans to Mars.” [emphasis mine]

It is important to highlight the fact that NASA has not yet made a decision on this issue. The best thing the agency could do, in my opinion, would be to step back, design nothing, but let private companies bid on providing the service. The expertise at many of the private satellite companies providing communications efficiently and inexpensively to private customers worldwide would easily provide NASA better communications at Mars for less money.

In other words, like manned flight and cargo delivery to ISS, NASA should simply become a customer, and let private companies build and own the products that NASA buys.

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Protecting the Mars orbiters from comet flyby

4:10 pm

Engineers are repositioning the American spacecraft orbiting Mars so that they will be better protected by the planet when Comet Siding Spring flies past on October 19.

The comet’s nucleus will miss Mars by about 82,000 miles (132,000 kilometers), shedding material hurtling at about 35 miles (56 kilometers) per second, relative to Mars and Mars-orbiting spacecraft. At that velocity, even the smallest particle — estimated to be about one-fiftieth of an inch (half a millimeter) across — could cause significant damage to a spacecraft.

NASA currently operates two Mars orbiters, with a third on its way and expected to arrive in Martian orbit just a month before the comet flyby. Teams operating the orbiters plan to have all spacecraft positioned on the opposite side of the Red Planet when the comet is most likely to pass by.

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The UAE wants to go to Mars

9:31 am

The competition heats up: The United Arab Emirates (UAE) announced today that it is creating a space agency to build and launch an unmanned mission to Mars by 2021.

The announcement included this statement by his Highness Sheikh Mohammed bin Rashid Al Maktoum, Vice-President and Prime Minister of the UAE and Ruler of Dubai:

Despite all the tensions and the conflicts across the Middle East, we have proved today how positive a contribution the Arab people can make to humanity through great achievements, given the right circumstances and ingredients. Our region is a region of civilisation. Our destiny is, once again, to explore, to create, to build and to civilise. We chose the epic challenge of reaching Mars because epic challenges inspire us and motivate us. The moment we stop taking on such challenges is the moment we stop moving forward.

I wish them luck, since building spaceships and exploring the heavens is a far better occupation that trying to kill Jews. I remain skeptical however. They will have to show real achievement before I will believe this is something more than a simple feel-good public relations stunt by the UAE’s leaders.

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Curiosity’s journey continues

9:00 am

After more than a full Martian year, Curiosity has finally traveled beyond the area of its initial landing zone.

The 1-ton Curiosity rover has now cruised out of its landing ellipse, the area — about 4 miles wide by 12 miles long (7 by 20 kilometers) — regarded as safe ground for its August 2012 touchdown within Mars’ huge Gale Crater, NASA officials said.

The interesting factoid from this article is how much smaller this landing zone was for Curiosity compared to all other previous landers, illustrating how the technology has advanced during the last four decades since Viking.

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