Tag: opportunity

Close encounter with a dust devil

10:14 am

dust devil near Opportunity

Cool image time! On March 31st, as the Mars rover Opportunity took an image of the tracks it left behind as it attempted to climb the steepest slope it has yet attempted, it unexpectedly captured a nearby dust devil. The image to the right is a cropped version of that image

Be sure and take a look at the original image. Not only is the dust devil clearly imaged, showing it to be intense enough that it casts a shadow, the image gives a very good sense of the steepness of that slope. It is not surprising that Opportunity had problems getting up that hill, and eventually had to retreat because it couldn’t get to its target rock formation.

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Opportunity takes a spin

9:36 am

In attempting several times this past week to climb the steepest ever tried by a rover on Mars and failing, Opportunity has moved on to a new less challenging target.

The rover’s tilt hit 32 degrees on March 10 while Opportunity was making its closest approach to an intended target near the crest of “Knudsen Ridge.”

Engineers anticipated that Opportunity’s six aluminum wheels would slip quite a bit during the uphill push, so they commanded many more wheel rotations than would usually be needed to travel the intended distance. Results from the drive were received in the next relayed radio report from the rover: The wheels did turn enough to have carried the rover about 66 feet (20 meters) if there had been no slippage, but slippage was so great the vehicle progressed only about 3.5 inches (9 centimeters). This was the third attempt to reach the target and came up a few inches short.

The rover team reached a tough decision to skip that target and move on.

Having operated thirteen years longer than originally planned, the science and engineering team that operates the Mars rover Opportunity are increasingly willing to try more risky things. For example, the valley the rover is in, called Marathon Valley, is actually an east-west slice through the rim of 14-mile-wide Endeavour Crater. Traveling into that slice towards the crater’s interior is a far riskier trip than ever dreamed of by Opportunity’s designs more than a decade ago.

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Watch Opportunity’s full journey on Mars, in 8 minutes

9:54 am

The science team for the Mars rover Opportunity have released an 8-minute movie compiled from the rover’s hazard-avoidance cameras. Enjoy!

One comment: There is a long stretch of territory south of Albuquerque, New Mexico called Jornada de Muerto, which means “Journey of Death” in English. It gets its name from its lack of water or life. This video makes that stretch of land look like a water park, strongly highlighting the utter barrenness of the Martian surface.

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Opportunity enters Marathon Valley

3:19 pm

Opportunity at the mouth of Marathon Valley

For the John Batchelor Show tonight John and I taped this afternoon a two-segment interview with geologist Bill Farrand, who is part of the science team for Opportunity. The image above shows Opportunity’s recent travels as well as its next target. (Click on the image for the full resolution image.) Assuming the rover’s memory problems don’t get worse and Congress decides to reverse the decision of the Obama administration to end all funding for Opportunity, the scientists hope to take the rover east into Marathon Valley, a very distinct break in the rim of Endeavour Crater.

Whether they will continue east into the crater itself Bill could not say. Some scientists have been pushing for that eventual goal, while others would prefer to do more research along the rim.

What is interesting about Marathon Valley is that it takes the rover deep into the crater’s rim. Previously Opportunity has been limited to exploring the rim’s outer edges, since the rim itself is generally too rugged for the rover to traverse.

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Opportunity has another brief memory loss

8:14 pm

Less than a week after engineers had rebooted the rover’s memory and thus thought they had solved its flash memory problems, Opportunity has had another brief bout of amnesia.

They didn’t loss any data, and the event was much smaller than the problems that had shut down use of the memory banks in December. Nonetheless, they do not know what caused it.

Accumulative problems like this are what will likely end Opportunity’s life. It appears we might be seeing the arrival of old age in the rover.

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Opportunity’s flash memory reformatted successfully

10:15 am

A three month old flash memory problem on the Mars rover Opportunity has finally been fixed by reformatting the rover’s memory banks.

Since the problem came up in December they have been operating the rover without any flash memory, essentially running it on the equivalent of its ram memory. This fix allows them to once again store data on the rover and gives them more flexibility of operation.

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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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Budget issues continue to threaten a number of successfully functioning science spacecraft, including Opportunity on Mars and Lunar Reconnaissance Orbiter circling the Moon.

9:51 am

Penny wise, pound foolish: Budget issues continue to threaten a number of successfully functioning science spacecraft, including Opportunity on Mars and Lunar Reconnaissance Orbiter circling the Moon.

Don’t be surprised if NASA announces soon that they are shutting down these spacecraft so they can save some money. Or as the article notes, “Money not spent on these extended missions will probably slide into [the Science Mission Directorate’s] Black Hole of Funding (the James Webb Space Telescope) or be dissipated on new paperwork, committee meetings and concept studies.”

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The Obama administration budget proposal for NASA includes shutting down Opportunity in 2015.

8:16 pm

Penny wise pound foolish: The Obama administration budget proposal for NASA included shutting down Opportunity in 2015.

This is very stupid. It costs about a billion dollars to build a rover and get it to Mars. And that’s assuming everything works. Opportunity is already there and functioning flawlessly at a fraction of that cost. Rather than cutting Opportunity, NASA should consider cutting the new rover mission so that the money could be used for other planetary exploration, such as a mission to Titan.

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Orbital images from Mars Reconnaissance Orbiter have confirmed that the mysterious rock that appeared near Opportunity was not ejecta from a nearby meteorite impact.

2:29 pm

Orbital images from Mars Reconnaissance Orbiter have confirmed that the mysterious rock that appeared near Opportunity was not ejecta from a nearby meteorite impact.

The scientists theorized that there was a very remote chance that a nearby impact has thrown the rock into place, but the images show nothing nearby. Moreover, if there had been an impact we probably would have seen more rocks raining down all around. The images are further confirmation that the rock was kicked up by the rover itself as it rolled along.

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In celebration of the tenth anniversary of Opportunity’s landing on Mars, the journal Science publishes a special section of the newest findings from Mars.

1:03 pm

In celebration of the tenth anniversary of Opportunity’s landing on Mars, the journal Science has published a special section of the newest findings from Mars.

The main conclusion of all this research is that Mars was once potentially habitable, though there is no evidence so far to show that anything actually inhabited it. The data obtained however is now giving scientists clues on the best places to look for the remains of that ancient life, should it exist.

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A donut-sized rock suddenly appears in front of the Mars rover Opportunity.

10:18 am

A donut-sized rock suddenly appears in front of the Mars rover Opportunity.

NASA announced the discovery of the rock at an event at Caltech in Pasadena this past Thursday night, dubbing the rock “Pinnacle Island.” “It’s about the size of a jelly doughnut,” NASA Mars Exploration Rover lead scientist Steve Squyres told Discovery News. “It was a total surprise, we were like ‘wait a second, that wasn’t there before, it can’t be right. Oh my god! It wasn’t there before!’ We were absolutely startled.”

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A map of Opportunity’s journey on Mars as it approaches its tenth anniversary since landing on January 25, 2004.

4:17 pm

A map of Opportunity’s journey on Mars as it approaches its tenth anniversary since landing on January 25, 2004.

The map gives some nice perspective of just how far the rover has traveled in the past decade, as well as the increasing scale of the geological features it has observed. Opportunity began inside tiny Eagle Crater, moved on to larger Endurance Crater, then to the even bigger Victoria Crater, and now to the truly massive Endeavour Crator, 14 miles in diameter.

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In celebration of the 10th anniversary of the launch of Opportunity, Mars Reconnaissance Orbiter took its photograph.

8:58 am

In celebration of the 10th anniversary of the launch of Opportunity, Mars Reconnaissance Orbiter took its photograph.

The image was not merely for PR. It also provides the scientists operating Opportunity some good information about the region the rover is exploring, thus helping them plan out its further adventures on the surface of Mars.

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Opportunity, now moving to another target 1.5 miles away, has found evidence of drinkable water on Mars.

3:05 pm

Opportunity, now moving to another target 1.5 miles away, has found evidence that some of the water on Mars was once drinkable.

Before trekking off last month, Opportunity used a grinder to scrape away the top layer of a light-colored rock for a peek inside. The rock was so lumpy and covered with crud that it took the rover several tries to crack open its secrets. Unlike other rocks that Opportunity inspected during the past nine years, the latest told a different story: It contained clay minerals, a sign that water coursed through it, and formed in an environment that might have been suitable for microbes. Previous rock studies by Opportunity pointed to a watery past on Mars, but scientists said the water was acidic.

“This is water you can drink,” said mission chief scientist Steve Squyres of Cornell University.

More details here, noting that this water comes from an earlier time on Mars, when the planet’s environment was more benign.

So the rover has now sampled both sides of the momentous planetary transition from a wet, benign environment more than 4 billion years ago to a colder, drier, harsher one since then

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The Mars rover Opportunity has now traveled farther than any other American rover, including the Apollo 17 rover on the Moon.

4:15 pm

The Mars rover Opportunity has now traveled farther than any other American rover, including the Apollo 17 rover on the Moon.

The team operating NASA’s Mars Exploration Rover Opportunity received confirmation in a transmission from Mars today that the rover drove 263 feet (80 meters) on Thursday, bringing Opportunity’s total odometry since landing on Mars in January 2004 to 22.220 statute miles (35.760 kilometers). … The international record for driving distance on another world is still held by the Soviet Union’s remote-controlled Lunokhod 2 rover, which traveled 23 miles (37 kilometers) on the surface of Earth’s moon in 1973.

We have to once again remind ourselves that the roving part of Opportunity’s mission was originally only supposed to last 90 days, not 9 years.

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Opportunity went into safe mode during the communications pause in April when the Sun was between Mars and the Earth.

8:29 am

Opportunity went into safe mode during the communications pause in April when the Sun was between Mars and the Earth.

Mission controllers for Opportunity, which landed on Mars in January 2004, first learned of the issue on Saturday (April 27). On that day, the rover got back in touch after a nearly three-week communication moratorium caused by an unfavorable planetary alignment called a Mars solar conjunction, in which Mars and Earth are on opposite sides of the sun. The Opportunity rover apparently put itself into standby on April 22 after sensing a problem during a routine camera check, mission managers said.

It sounds like this is a recoverable problem and the rover will be back in operation momentarily. Stay tuned.

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