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NASA Extends Rover Occupation of Mars

iocat writes "Reuters reporting that NASA is extending the Rover missions on Mars by another five months. However, they point out that while the rovers look poised to greatly exceed their planned life cycle, they could basically die at any time. Still, it will be cool to see a little more exploration."

50 of 206 comments (clear)

  1. Almost first post by Pi_0's+don't+shower · · Score: 4, Interesting

    I wonder how much terrain these rovers can explore in 5 months, or if they're basically useless because of range limitations?

    1. Re:Almost first post by Jott42 · · Score: 5, Informative

      If memory serves me, they have a range of 30-75 meters /day, after the recent sofware upgrade. Which would give a maximum distance of over 11km, given that they dont find anything interesting on they way and starts investigating it.

    2. Re:Almost first post by AKAImBatman · · Score: 4, Interesting

      The difficulty is in their solar panels. Eventually they collect so much dust that they don't generate enough power. Also, the rovers stay very still at night to conserve power.

      Interestingly enough, the engineers nearly had an RTG working for the Rovers. Unfortunately, the outcry about Cassini pretty much killed that. It's too bad, because with an RTG, the power source would outlast the rest of the components by some 50 years!

    3. Re:Almost first post by Mal-2 · · Score: 5, Interesting

      Even with range limitations they're hardly useless. Both rovers landed in relatively fertile areas for exploration, and Opportunity would have still been a big success even if it proved unable to leave the crater it landed in. The main thing that comes to my mind is to find the edges of the ancient ocean and explore there -- partly because tidepools on Earth are teeming with life, and partly because shallow water means fossils (if present) won't be buried very deep. I noticed very early on that the rocks Opportunity was looking at looked an awful lot like tidepool rocks, at least ones from the eastern Pacific shore (the only ones I've seen firsthand). I knew there was good reason for NASA to be REALLY damn sure before announcing there was a lot of water on Mars at one time, but I pretty well was convinced as soon as I saw those distinctive wormholed rocks.

      However, it looks like their lifespan will be determined by a few factors, some of which are within human control and some which are not:

      1. Dust storms. Seems to me one good one would pretty well take a rover out of service from dust buildup on the panels alone.

      2. Equipment failure, particularly the "always on and draining power" type. One has already made Opportunity a little bit gimpy, but I doubt a single such failure would be fatal. Cumulatively, several would just be too much to bear.

      3. Shorter and/or darker Martian days as the seasons and distance from the sun change. This won't take out a rover outright of course, but they could compound the prior two problems. At least these events are predictable.

      4. The Martian Defense System finally tracks the rovers down and explodes them. Turns out the reason they didn't shoot the first time is they thought it was just another shipment of punching balloons for their nitrous oxide-fueled nightlife. Once they realize we sent ROVERS and not RAVERS, they're going to be mighty pissed off.

      Mal-2

      --
      How is the Riemann zeta function like Trump rallies? Both have an endless number of trivial zeros.
    4. Re:Almost first post by snake_dad · · Score: 2, Informative

      Opportunity already drove 100 meters in one day. Ofcourse the terrain on Meridiani is completely different compared to Gusev.

      --
      karma capped .sig seeking available Slashdot poster for long-term relationship.
    5. Re:Almost first post by Sgs-Cruz · · Score: 5, Informative

      For those who, like me, aren't astrophysicists and had to look up an RTG, it's a Radioisotope Thermoelectric Generator. Basically a nuclear power source for the rover.

      --

      Karma: pi (Mostly due to circular reasoning in posts).

    6. Re:Almost first post by AKAImBatman · · Score: 3, Informative

      The problem is RTG could contaiminate the planet.

      No, it wouldn't. Not any more than the rover itself. There's millions of tons of radioactive material impacting every planet in the solar system each year. A pound of Plutonium-238 won't make a lick of difference. Besides, it's not like the stuff leaks like radiator fluid or something. It's just a hot rock that sits in the center of its container.

    7. Re:Almost first post by AKAImBatman · · Score: 4, Interesting

      Keep in mind that RTGs are passive devices, not reactors. As such, the radiation dosage will never exceed that of a pound of Plutonium-238. Plutonium-238 gives off a significant amount of radiation (half life of 87 years), but it's all Alpha particles. Since the Pu-238 is emitting Alpha particles, the radiation tends not to even make it through a piece of paper, much less the indestructible casing they pack these things in. Besides, the heat generated by the Alpha particles is what gives the RTG power. Doesn't make a whole lot of sense to let your power escape. :-)

      I'm still waiting for the first mission where they use SRGs (Stirling Radioisotope Generators). Those little stirling engines are far more efficient than the heat differential of RTGs. If the tech works out, it could even be a boon for lower powered devices on Earth. I figure that a tiny SRG with about 5-10 grams of Pu-238 or Sr-90 could power your cell phone for 50 years. A laptop (depending on the design) could be powered by 100-600 grams.

    8. Re:Almost first post by gnuman99 · · Score: 2, Insightful

      OMG!! Yes, I want a fukcing Sr-90 in cell phones!!!

      Look on the fucking periodic table. Sr-90 is almost chemically the same as calcium. So yeah, put it in my cell phone. Then your kinds will have it in their bones!!! I guess leukemia is a type of flu in your world.

      Sr-90 is one of the *worst* contaminants. google Same thing for iodine-131

      You already have to use steel that was forged before WWII to make high sensitivity radiation detectors. But that's not a problem, lets fuck up the planet (ie. us) so we can talk on the cell phone for 50 years!!!!!!

      Use RTG in a very limited way for science, esp. for space probes where power is scarce. DO NOT USE IT IN A CELL PHONE!!!

  2. It's NOT "occupation". by Dark+Lord+Seth · · Score: 5, Funny

    It's "liberation" instead, people.

    1. Re:It's NOT "occupation". by Anonymous Coward · · Score: 4, Funny

      Not Troll, +1 Funny.

      Especially funny when you consider that the Martian Defences were reallllllly good at taking out bogies until NASA pulled an unprecedented 3 for 3, 100% success on their landers.

      Continue the liberation of Mars! Soon it will look just like Earth, scattered bits and pieces of long-range weapo^Wmetal everywhere.

      All we need is some smog and we can call it home!

    2. Re:It's NOT "occupation". by flewp · · Score: 2, Funny

      You mean Roverlords.

      --
      WWJD.... for a Klondike bar?
    3. Re:It's NOT "occupation". by snake_dad · · Score: 2, Insightful
      Viking lander 1: success
      Viking lander 2: success
      Pathfinder: success
      Polar Lander: fail
      Spirit: success
      Opportunity: success

      What am I missing here?

      --
      karma capped .sig seeking available Slashdot poster for long-term relationship.
  3. Occupation? by pldms · · Score: 4, Funny

    It's an occupation of Mars now? I thought the were just tourists.

    --
    Slashdot looked deep within my soul and assigned
    me a number based on the order in which I joined
  4. Hope they didn't skimp on construction. by PIPBoy3000 · · Score: 4, Funny

    "However, while Spirit is past its 'warranty', we look forward to continued discoveries by both rovers in the months ahead."

    Maybe they should have gotten that rust-proof coating after all.

  5. unmanned missions by Stargoat · · Score: 3, Insightful

    Unmanned missions are great. Humans can run out of food and air, and get tired and homesick. Robots can run basically forever, until something breaks or they run out of juice. If these things prove 1/50 as durable as Galileo did, they'll provide science more than we ever could have hoped for.

    --
    Hoist Number One and Number Six.
    1. Re:unmanned missions by morcheeba · · Score: 4, Interesting

      I hate to argue with your logic, but here goes:

      Robots can run basically forever, until something breaks or they run out of juice.
      Somehow running out of this consumable is better than a human running out of their consumables (food and air)? If you want to be accurate, there are mechanisms for both to regenerate these consumables -- solar cells and plants.

      One unique thing about people (besides their intelligence) is their self-healing characteristics ... if a robot gets a little hole in a hydraulic tube, it'll leak until it's empty. A human would clot that blood and carry on. If a human breaks a leg, you can bet they'd figure out a way to complete the mission with just one leg... I wouldn't give a robot those odds, even if they lost only one of six legs.

      But, I agree.. unmanned missions are great, just for totally different reasons: low cost and hence, the ability to many missions to many different areas, each with new instruments designed to test theorys proposed by the results of previous missions. A human mission would blow the whole budget with just one trip.

    2. Re:unmanned missions by anzha · · Score: 5, Informative

      If these things prove 1/50 as durable as Galileo did

      If I may extract something I read from a post on Usenet a few years ago by a real astronomer (Frank Crary) about Galileo:

      JPL and NASA say that Galileo accomplished 80% of its science goals, and they got that number (as I understand it) by going through the list of science goals, giving each a yes/no value, and dividing the number of yes's by the number of items. Usually, it isn't that simple. There is, ``yes, but not as well as we wanted'',``definitely yes, but we could have done better'', ``no but we still got some good data along those lines'', etc. Nor were all the goals of equal value, although you could argue endlessly about which were worth more than others. Then you get into the never-never land of things that were not on that list. I'm fairly sure that magnetometer data on the existence of an ocean on Europa wasn't on the list, and I'm quite sure that similar data on an ocean within Callisto definitely wasn't (just to use one example I'm familiar with.) Often, when you observe something, you discover something you did not expect to find. In several cases, Galileo has done that. Would there have been more unexpected discoveries if the high gain antenna had opened? Yes, definitely. But how many and how important? How can you attach a number to something like that? I would say that Galileo is a success, but not a complete success, and that the sum total of the scientific results is between 50 and 100% of what it might have achieved. I don't know, and I don't even know how to figure out, where between 50 and 100% the ``real'' value is.

      That's from here.

      Two notes.

      First being that Galileo didn't provide more science than we hoped for. In many ways, it provided a lot less than we hoped for. I'm not calling it a failure, BTW.

      Secondly, be careful whatcha say online...it might come back to haunt ya years down the line. ;)

      --
      Do you know why the road less traveled by is littered with the bones of the unwary?
  6. Wow by Auckerman · · Score: 4, Funny

    Who would have thought they would extend it again this soon after extending it the first time?

    --

    Burn Hollywood Burn
  7. Excellent! by qualico · · Score: 4, Interesting

    Its always good for future missions if the current ones exceed expectations.

    Looking at Mars, now a distant orange glow in the sky, it amazes me that we have intelligence there.

    Good job NASA.

  8. NASA Press release 4/8 by morcheeba · · Score: 5, Informative

    This was posted on JPL's rover site on Thursday. It's got a lot more info.

  9. Occupation? by The_K4 · · Score: 2, Insightful

    The durration of their "Occupation" isn't changing. They are there to die and be buried in dust. Their operation limetime has been extended!

  10. Duplicate? by WayneConrad · · Score: 2, Informative

    For more comments, see this article from the 11th.

  11. Free MARS! by xmorg · · Score: 2, Funny

    End the occoupation of mars! We are the ALIENS HERE, violating the privacy of our neighbors by sending back constant images of their sacred homeland. this calus discregard for intergalactice rights is appauling!!!

  12. Rivers? by Unnngh! · · Score: 2, Funny
    From the article:

    NASA said it would spend $15 million more to keep the rivers exploring the planet's surface through September.

    A bit optimistic about the discovery of water on Mars, aren't we?

  13. Oh? by Ensign+Regis · · Score: 2, Funny

    Were we planning to send them back at some point?

  14. wouldnt it make sense by kaltkalt · · Score: 3, Insightful

    wouldn't it make sense to initially plan the mission for as long as the rovers remain operational, however long that may be?

    --

    Stupid people make stupid things profitable.
  15. occupation by mikeg22 · · Score: 2, Funny

    I wonder how long until the native get restless, and we get the Martian equivalent of Al'Sadr resisting the occupation?

  16. Re:Why? Because it is inexpensive. by David+Hume · · Score: 4, Insightful

    Why? Did they decide to extend the mission because people love following it and want to keep it going? Or are they extending it because they haven't found anything "big" to report on yet?


    I expect at least part of the reason is because it is inexpensive. According to the Reuters report, "NASA said it would spend $15 million more to keep the rivers exploring the planet's surface through September." Can you think of a more cost-effective way for NASA to spend that money?

  17. Let's hear it again for JPL by Steve+the+Rocket+Sci · · Score: 5, Interesting

    Pasadena's Jet Propulsion Laboratory (JPL) has done it again, it would seem. When the Voyager 1 and 2 missions were launched in 1977, they estimated that they would only last until the encounter with Saturn roughly four years later. Now, in 2004, they are still returning useful data, at a distance of over 90 AU from the Sun (in comparison, Pluto is only 40 AU from it). Sure, they had their problems during the mission, but it looks like Spirit and Opportunity may share a similar quality construction. It's definite that they won't last 27 years, but with how well they are functioning, I think the only limit will be the Martian dust collecting on their solar panels. When they Next Generation Rover lands on Mars in the latter part of this decade, it will hopefully use nuclear power, and overcome this obstacle.

    1. Re:Let's hear it again for JPL by m11533 · · Score: 2, Interesting

      Rather than going nuclear, maybe there is an ingenious way to clear the dust off their solar panels, thus extending their useful lifespan indefinitely. I can't imagine there isn't a solution to that problem... maybe something as "simple" as the ability to rotate the panels into a 90-degree position and then shake. Sure seems much simpler than engineering a nuclear based solution.

    2. Re:Let's hear it again for JPL by silentbozo · · Score: 3, Interesting

      Actually, the nuclear based solution IS the simplest. It's nothing more than a small mass of isotope, a thermocouple, and a pair of wires. It's certainly simpler than a pair of solar panels, or the gyrations you'd need to go through to get rid of the dust coating (electrostatic attraction probably is the factor here.) The Voyager series of probes use these radioisotope-powered thermocouples, and look how long their active life has been.

    3. Re:Let's hear it again for JPL by El_Smack · · Score: 3, Funny

      I think the only limit will be the Martian dust collecting on their solar panels.

      Maybe NASA can cut a deal with the DOJ to go easy on Martha Stewart in return for her help on this. If anyone could find a simple, yet attractive solution it's her. Recycle the impact ballons into attractive doilies for the panels or something.

      Or even better, get the Anal Retentive Carpenter from SNL to make a nice "Solar Panel Cozy" for it.

      --


      There are 01 kinds of cars in the world. The General Lee, and everything else.
    4. Re:Let's hear it again for JPL by jwbing · · Score: 2, Interesting

      I remember reading about NASA contemplating some sort of 'blower' device be installed on the rovers. It was cancelled as it would have added more complexity and weight to the system. NASA determined it would be cheaper just to increase the dimensions of the solar panels, thus providing more juice for when they start to get dusty.

  18. manned missions by kippy · · Score: 3, Insightful

    Unmanned missions are great.

    So Are manned ones in the right context like Mars.

    Humans can run out of food and air, and get tired and homesick.

    On Mars humans can make their own air water and food provided a power source like a portable nuclear reactor and the air and ground around them. It's called living in-situ. As long as you don't send flakes, the homesickness isn't an issue. They're allowed to sleep and would have more waking time than the rovers so I wouldn't worry about them getting "tired".

    Robots can run basically forever, until something breaks or they run out of juice.

    You just contradicted yourself there.

    If these things prove 1/50 as durable as Galileo did, they'll provide science more than we ever could have hoped for.

    Perhaps but humans on the surface would have been able to work faster and smarter these probes. Galileo was well suited to its mission and a human would not have been. In the case of Mars, humans are much better suited.

  19. Software Issues by QuantumFTL · · Score: 5, Informative

    All the scientists here at JPL are very happy to see that we'll be getting more science, however one of the issues is that we're going to be moving to a less efficient planning cycle, planning for two days per rover at a time. Also it will all be being done on earth time, which is nice for scientists, however it means things have to be planned very far in advance.

    Also one of the problems we are experiencing is that a lot of the mission software was originally designed to only run at JPL on our computing environment, and is very difficult to take back to home institutions because it is so specialized.

    I'm currently working on making the Science Activity Planner (the tool used by all scientists to do high level planning before they start sequencing) work collaboratively over the web. It's exciting because we're dramatically increasing the amount of people who can participate in high level planning. You can grab the public version, called Maestro, here.

    One of the other challenges is the bandwidth and latency associated with transfering autogenerated data products (imagery etc) to all of our satalite institutions. I'm currently working on ways to reduce the necessary bandwidth but without lossy compression there's only so much one can do.

    Anyways, this part of the mission will test out a paradigm known as "Distributed Mission Operations". You can download a paper written by my supervisor about how this was used on Pathfinder here.

    Future mars missions will last far too long to bring scientists away from their home institutions and pay for temporary housing etc (which is a significant cost). Scientists want to be with their collegues and families during the long periods of exploration.

    Hopefully this will prove that it is both feasible and desireable. There are several studies going on about this, but I'm not aware of any relevant links.

    Cheers,
    Justin Wick
    Science Activity Planner Developer
    Mars Exploration Rovers

    1. Re:Software Issues by kitzilla · · Score: 4, Funny
      Justin, who names the rocks? You guys are clearly having too much fun in that department.

      How about letting Slashdotters name one? C'mon -- nobody will notice. It's just us geeks here.

      From a future JPL release:

      The rover Opportunity started sol 365 this morning with a quick brush-off of the rock known as "Linux Rules." Later today, Opportunity will turn its attention to another feature, a dull-looking boulder called "SCO Drools."

      --
      This is my post. There are many others like it. If you don't like what you read here, go try one of the others.
    2. Re:Software Issues by QuantumFTL · · Score: 3, Interesting

      Justin, who names the rocks? You guys are clearly having too much fun in that department.

      Actually, my friend Merideth considers herself to be the feature-naming goddess for Spirit, so if /.ers will reply to this post with possible names, I'll put in one of the highest moderated ones for consideration.

      No promises though :)

      Cheers,
      Justin

    3. Re:Software Issues by Dirtside · · Score: 2, Interesting

      Well, given the forum, here's some ideas:

      - Beowulf
      - Soviet Russia
      - Natalie
      - Dupe (if you find two adjacent rocks that are extremely similar)
      - Profit
      - Overlord

      I think that covers the bulk of common /. humor. :)

      --
      "Destroy science and religion. Science would re-emerge exactly the same; but not religion." - Penn Jillette, paraphrased
  20. When they do fail ... by dnamaners · · Score: 2, Funny

    I wonder what could be done with them when they do fail?

    my top picks in no particular order:
    1.) Auction them off on Ebay (like that channel drill) and make the buyer pick em up. that may help finace the manned mars mission goal ... Russions pickup worlds most expensive a door stop...

    2.) Call AAA for a tow, membership has its rewards.

    3.) File insurance clames on the loss. Perhaps NASA could cite water damage.

    4.) But probably the best use, 3 words, "interstellar p0rn server". Lets "spread" our culture among the stars. That of course would require NASA still be able to upload a "firm ware" upgrade.

    *brain is: [ ] in, [ X ] out to lunch, [ ] gone home for the day

  21. excessive lifetimes by Dr.+Mojura · · Score: 3, Funny

    while the rovers look poised to greatly exceed their planned life cycle, they could basically die at any time.

    Kinda like Dick Clark?

    --
    "Nothing exists except atoms and empty space; everything else is opinion." - Democritus
  22. Is anyone else as amazed by these things as I am? by BRSQUIRRL · · Score: 3, Insightful

    Every day or so, I head over to this site to check out the latest images. Some of the high-res color photos look like something I could have shot with my digital camera out in the desert somewhere, but then I remember: they were taken on ANOTHER FREAKING PLANET. It really is a amazing thing to be alive to see. The folks at NASA and the JPL should be proud of themselves.

  23. Re:You must mean "dust-proof coating" by isaac · · Score: 2, Informative
    You must mean "dust-proof coating". Given that there is no water on Mars and almost no oxygen, rust would not be much of a problem.

    Actually, Mars is red precisely because of rust - iron oxide. Quite a bit of the dust, particularly the hematite-bearing stuff at the Opportunity site, is composed of iron oxides - the dust is rust!

    Incidentally, it's suspected that the reason there's not significant molecular oxygen in the Martian atmosphere is precisely because it's been locked up in the iron-rich surface.

    -Isaac

    --
    I am not a lawyer, and this is not legal advice. For Entertainment Purposes Only.
  24. Drones by westies-from-hell · · Score: 2, Funny

    Why do I have these mental images of Huey and Dewey wandering around, planting trees...?

    --
    "Just because you're a genius doesn't make you a smart guy!" -- Narrator, Powerpuff Girls
  25. Re:So why not have wipers on the panels? by AKAImBatman · · Score: 2, Interesting

    This is an old discussion, so I would recommend you do a search to fully answer your question. Basically though, it came down to several facts:

    1. The dust would most likely be statically charged.
    2. Wipers would tend to damage the panels.
    3. The extreme environment is slowly degrading the panels anyway.

  26. Good - maybe they will run out of songs then by Pvt_Waldo · · Score: 4, Funny

    Personally I'm sort of tired of all the "cute" stuff. Like the wakup music and the rock names.

    It's like reading a wedding announcement or something. "And the chief scientist wore a stunning black outfit, and his research maids wore matching green shirts with long sleeves rolled up. Custom pencils were used by all. The guests were delighted to see palm pilots made available for everyone, each customized with a charming orange Mars theme!"

  27. Rock Names! by efuseekay · · Score: 2, Interesting

    Here is my list (they are even slightly descriptive)

    1. First Post
    2. Troll
    3. Hot Grits
    4. The Insensitive Clod
    5. Anonymous Coward

    --
    Mode (3) smart-aleck mode. Press * to return to main menu.
  28. Mozilla! by njchick · · Score: 3, Interesting

    Mozilla is red like Mars. Mozilla is strong like a rock. Scientists know Mozilla. Mozilla will go to Mars, and followers of Mammon will cower in horror :-)

  29. Won't kill you next to the skin... by Goonie · · Score: 2, Interesting
    According to the Wikipedia, plutonium emits alpha particles, which can't penetrate the skin. You have to swallow the stuff for it to kill you.

    However, you wouldn't exactly want it lying around and getting thrown in landfills, either, so I can't imagine it being used in consumer products any time soon. At least Pu-238 can't be used in nuclear weapons (a big enough piece of the stuff to make a bomb out of would be too hot to be stable).

    --

    Any sufficiently advanced technology is indistinguishable from a rigged demo
    --Andy Finkel (J. Klass?)
  30. Name a rock, 'Tux' by Megaport · · Score: 5, Interesting
    Actually, my friend Merideth considers herself to be the feature-naming goddess for Spirit, so if /.ers will reply to this post with possible names, I'll put in one of the highest moderated ones for consideration.

    Hi Justin,
    How about we get the ball rolling by naming a rock 'Tux', after the Linux mascot penguin?

    --
    # grep slashdot access.log | grep html | sort | uniq | wc -l 2604