NASA's Sensor Web

ddtstudio writes "PC Mag has a story about the Sensor Web: 'a cutting-edge application of networked sensor technology currently on the fast track at NASA's Jet Propulsion Laboratory (JPL).' Not only a new way to test tech, but also perhaps a pervasive and inexpensive way to explore remote places such as Antarctica -- or Mars."

Comments

Interesting technology

[mjmalone]

Yet another new development from NASA that could have a huge impact on daily life. If these devices were strategically located worldwide it seems like much more accurate weather pattern predictions could be made. Low cost weather stations that can communicate back to a central node could automatigically predict and track weather patterns around the globe. Maybe one day we will actually be able to rely on the local weather forcasts!

Re:Interesting technology

[demonbug]

Yet another new development from NASA that could have a huge impact on daily life. If these devices were strategically located worldwide it seems like much more accurate weather pattern predictions could be made. Low cost weather stations that can communicate back to a central node could automatigically predict and track weather patterns around the globe.

We can already track weather patterns all over the planet. The trouble is that this does not really solve the problem of predicting what will happen in the future - there are simply too many unkown factors affecting weather patterns for us to understand how and why they do what they do at this point. This isn't to say that a worldwide network of these semsors wouldn't be helpful, I just don't think they would solve the problems we have - satellites already give us a lot of worldwide data, but our weather forecasts beyond a few days out are still pretty unreliable (and often over much shorter time periods). If we want better weather forecasting we need to put more effort into figuring out all the factors that affect weather, which will probably require huge leaps in processing power over what is currently available - many of the world's most powerful supercomputers are already used for atmospheric modelling.

Re:Interesting technology

[windows]

This technology isn't as useful in meteorology as it might first seem. Knowing what happens on the ground is only part of the picture.

At least in severe weather, what's going on above the surface is very important. For example, it's important to know if there's wind shear. This is winds moving in significantly different directions or at different speeds at different levels, which leads to rotation. It's very important to severe storms. And it's also very important to know if there's any inversions, such as the cap. For those who don't know, the cap is a layer of warm stable air aloft. When warm rising air in an updraft hits a strong cap, it tends to stop rising, which kills thunderstorm development. If there's a moderate cap, some storms will break through, and if other ingredients are in place, storms can occur. Since the weaker storms can't break through the cap, the energy is saved for powerful ones. A moderate cap is particularly conducive to severe weather. If there's a weak cap or no cap, then the energy is used up quickly and not saved for the most powerful storms.

My point in all of this is knowing what's going on in the upper air is critical to forecasting, and this technology simply won't help you there.

Re:Interesting technology

[mpthompson]

Sensor webs are not used so much for predicting weather as they are for inexpensively recording a fairly wide range of environmental conditions at a resolution (temporal, geographic, etc.) far greater than can be achieved by satellite monitoring.

For instance, a sensor web could be spread over a 100 square mile area around a waste dump to help determine the regional impact of high carbon dioxide concentrations and other gasses leaching into the surrounding environment on a seasonal basis.

Or, another type of sensor web could be setup in a metropolitan area to measure the impact of environmental pollution laws and programs before and after they are implemented. For instance, in the San Francisco Bay Area, does a "spare the air" marketing campaign have a material impact on air quality within a few hours of being broadcast? Or, would other types of campaigns to achieve the same goals be more effective. It seems that an appropriately configured sensor web could provide firm data to answer such difficult questions.

Predicting rain next week is a very small aspect to the overall benefit of developing low-cost, commodity sensors that can be deployed in the manner described in the article. The exciting part is the technology is standardized, inexpensive, redundant, and easy to configure to continuously measure the specific aspects of an environment at whatever resolution is required.

Re:Interesting technology

[Slayk]

The applications in studying severe weather situations with technology like this are astounding. With severe weather, such as tornadoes, it is almost impossible to have a moblie doppler setup near the storm. If a small RADAR system were to be attached to a node such as this (though the cost and size of such an idea may prohibit an idea like this with current technology), and the dispersal rate was large enough, then environmental data never before seen of tornadic activity could be captured and relayed to the NOAA.

The biggest current bar to giving a bigger warning lead time to tornadoes is the lack of raw data on the vortex and the variables affecting it. This could prove very handy in studying that, and much better than the current system of chasing storms and praying to get close at the right time.

Re:Interesting technology

[ruprechtjones]

C' mon, we already learned about this in Jurassic Park. My theory is, kill that butterfly in Tahiti and there will be no tornados in Kansas this year. Problem solved.

traffic applications

[spamchang]

i was thinking you could set up a network of these at traffic intersections to determine the optimal stoplight pattern. but has anything already solved that?

Re:traffic applications

[DrMrLordX]

Hell, why not put a sensor web in a major metropolitan sewer system? Who knows what you'd turn up . . .

Pizza time!!!

Re:traffic applications

[phthisic]

IANATE (I am not a Traffic Engineer), but I am the son of one. As somebody already replied to you, they have loops under the asphalt at most intersections. They're basically big metal detectors (which always made me want to try to degaus someone's car so they wouldn't trip the signals). They're hooked into signal boxes on the corners and sometimes into central monitoring and control centers. They are used primarily to control signals rather than modeling traffic flow for study purposes (for that they mostly use a pneumatic tube running across the road which trips a counter). Signals can be operated by either loops, timers, or a combination of the two -- often times that varies by day, for instance a light at a crossroad may be timed during the day, but, at night, may be set to change only if someone pulls up to the loop. This is one reason why it pisses me off when someone stops ten feet before the stopbar (just before which the loops are generally located) -- that and it just seems like a stupid-ass thing to do.

As far as optimal stoplight pattern, that's a tricky issue. In many cases, lights are timed or operated by loops such that overall average vehicle travel time is greater than it could be, simply because studies have shown that driver satisfaction is increased if travel on major roads is less impeded by signals, even at the expense of greater delays on side roads. It's a matter of perception. So the 'optimal stoplight pattern' is a combination of decreasing average vehicle travel time and accomdating drivers' faulty perceptions of what is optimal.

As is often the case with human interaction with technology, the technology here is well-studied and well-tuned. The problems mostly lie with human perceptions, reaction time, errors, etc. For instance, the average time between when a signal turns green and when the first driver begins to move is 3 seconds. That also pisses me off. I drive a stick and I'm gone in a second.

Also, having said all that about the technology being up to speed, I have to qualify it. The states set up regulations on signals, including their timing and such, but it is up to the government which owns the signal to implement the policies. In many cities there is no central signal administration and signals operate independantly or in small networks which means poorer coordination of traffic. Also, city traffic engineers are not always Traffic Engineers but often electrical or other engineers. No doubt they are fine electrical engineers, but you wouldn't necessarily want one designing bridges, nor managing traffic.

So the answer to your question is that the problem is not with the modeling or the engineering, but rather with the implementation.

NASA's Web Sensoring

[Anonymous Coward]

NASA's sensoring the web!?!?!?

Quick, call the EFF!!! ;-)

They need to be more outspoken

[mao che minh]

Is it just me, or does NASA tend to drop bomb shells on the public out of the blue? Rarely are NASAs projects made *largely* public during progress, but rather only at fruition.

NASA might win more more public approval if they loudly proclaimed their endeavours while they worked on them. As it stands, only their failures get much notice.

Re:They need to be more outspoken

[Slayk]

Well, I understand how good PR can affect the funding (or lack thereof) of NASA, they are scientists at heart. Scientists tend to have a habit of being very quiet about their work for the most part. Perhaps it comes from the focus on the project, or the desire to avoid exposing an idea that failed in experimentation, but that is the way they are. Personally, I would rather NASA devote their budget to doing the work they currently do, rather than wasting time with pleasing the public.

Re:They need to be more outspoken

[mao che minh]

Let's face it though, pleasing the public and sparking it's interest makes you money, and makes it more likely that people will approve your funding "just because". When you are dealing with things that are obscure to the public but are in reality highly critical, winning public approval should be a top priority. Just hire a few really good PR people, that's all.

Re:They need to be more outspoken

[toughluck]

You make an excellent point. I would hope that NASA spens their time/budget doing their work instead of pleasing the public. However I also would think that its probably better that they don't try to let the public know about everything they do. I am willing to bet they try so many different angles at a project that a good precentage of the puclic would not agree with (maybe even not understand) all of them. Its easier to make the masses see that you have done something, than it is to make them see why you had todo those 50 other things wrong to get that one thing right.

Re:They need to be more outspoken

[segment]

Maybe these bombshells could be to sway the attention away from the past failures they've had, or perhaps to divert attention from some bombshell about to be dropped with that last shuttle crash. It could be NASA is just trying to maintain a favorable disposition with the general public since congress has drastically slashed their budget for the past decade+

Re:They need to be more outspoken

[mattkime]

Isn't that the way we want it to work? "Today NASA received transmissions from what appears to be intelligent lifeforms! Scientists are working around the clock to decode their communications which appear to be mostly grunts and whistles."

....two weeks later...

"Sorry, it was a hip hop video transmission that bounced off the moon and back to earth."

Just say no to Sensorship

[CraigoFL]

I don't care whether it's NASA, libraries, Homeland Security, or the Chinese government, media sensorship is wrong; it hurts everyone's freedom when you sensor the web.

Bad spellers of the world untie!

Yet another reason for IPV6

[under_score]

These things should have Internet presense, of course. Otherwise what are they really good for? Given the sort of things they might be used for, I can see 4 billion IP addresses being used up real quick! And putting them on the Internet seems like a really small step from what is described in the article (I didn't follow the rest of the links... maybe they are already doing this?).

If this sort of thing becomes ubiquitous, they could be really useful for a lot of things that we don't tend to like: e.g. surveillance.

Go There Yourself

[Brad the Informer]

This would be a misapplication of technology to use it to explore Antarctica. Dammit, I paid over $7K each for myself and my wife to go to there!

If you want to see it, see it the way God intended; from the deck of a ship with very, very strong hull plating.

(By the way, it's all water, rocks, sea lions and penguins.)

sensorweb@home anybody?

[mpthompson]

This is pretty neat stuff. Perhaps NASA could sponsor a type of sensorweb@home project where these pods could be purchased at a fairly low cost by tech geeks around the world and deployed wherever -- like dandelion seeds spread into the wind. If it had an 802.11b transceiver and wasn't too expensive I would be willing to put such a pod on a post in my backyard, record it's location and let it communicate it's data over my wireless network to a central data repository on the Internet. Most pods would tend to be concentrated in populated areas, but surely many would find their ways into remote locations as well.

If such a sensorweb@home program were successful with 10,000's of pods deployed, a vast quantity of environmental data could be collected on a global scale at a relatively low cost. Such a global network could provide greater context for data captured by planned regional sensor webs or the data could be filtered to create virtual sensor webs for testing hypothesis without the effort and expense of deploying an actual sensor web.

Do others think that people would participate in such a project that would provide any direct benefit to the participants? Downloading and installing seti@home is one thing, actually purchasing and installing a sensor pod is another.

Re:sensorweb@home anybody?

[Orion2]

I doubt that this would make any sense, since you couldn't use it in any decent way. When you collect data, you need to make it comparable. You usually achieve this by making sure that the environmental parameters of sensors are either the same or have a known offset from each other, so that you can correct the measurements of those. Take the example of measuring temperature with a web of sensors. You wouldn't know where all the people installed theirs - over concrete ground, in the shadow, inside or outside of the house, in the woods, next to an airconditioning air outlet and so on. With other measurements it's even more complicated.

Sensorship?

[swankypimp]

Geez, I first read the headline as "NASA Censors Web" and figured it was some juicy YRO story.

NOTE TO SELF: Do not drink heavily and browse Slashdot at the same time. When your judgment is so impaired that the grinning Tux icon starts looking sexy, it's time to put the cognac down.

Rocket Science

[Anonymous Coward]

The article quotes Kevin A. Delin, the leader of the JPL Sensor Webs Project, as saying, "Or the Sensor Web might be able to tell that up the hill the soil gets more dry because water tends to run downhill."

I tend to agree. I learned this about 28 years ago, playing in the backyard with a garden hose.

I'm currently working on a grant regarding my theory that branches tend to grow up and roots tend to grow down.

My next project will be on my theory that lousy engineers tend to flow upwards toward management.

What's With This Quote?

[zpiderz]

"Part of the problem with searching for life on Mars," Delin continues, "is that the conditions for life aren't always present. We know from earth that sometimes the air temperature gets just right and you go into the sunlight, liquid water forms, and all of a sudden things bloom very quickly. It's hard to be there for that kind of event unless you put in place a sort of continual virtual presence. That's what the Sensor Web on Mars will be."

Ok, to me this quote seems to not make sense. Do they expect life on Mars to suddenly appear at some moment and have their sensors catch it and then it dies? If you believe in evolution, it takes LOTS of time for life to appear and many, many years of ideal conditions. Yes, there might be life on mars (some bacteria can survive extreme temperatures and conditions. we know that) but if it exists it should have been because the conditions were just right for many years not because all of a sudden it was the perfect temperature and conditions for bacteria to grow. IMOHO, This article makes it sound like life on Mars is going to suddenly appear and we want to catch it. It's not like the Mars climate has changed in thousands (millions?) of years.

On the other hand, this technology does have great potential for use on Earth. Maybe we should focus on that first.

- Mod the drunk guy up!

Reverse that...

[Transcendent]

Not only a new way to test tech, but also perhaps a pervasive and inexpensive way to explore remote places such as Antarctica -- or Mars.

Like many others, you seem to reverse the implementation of this technology in your head. It's primary purpose is not to "test tech", and the possibility of exploring remote places is above just a simple "perhaps". If you read the article you would realise that:

One of our first applications for a Sensor Web has been to put one in remote regions of Antarctica.

You, like many others, are continually making the mistake that all this new and grand technology is made for "tech", computing, and advances in video hardware so you can get a couple more FPS's out of your favorite first-person-shooter.... You need to see the real importance behind the technology.

//begin comical dialog

Scientist: We just developed a communication system that will allow us to instantly transfer data to and from satellites no matter what their distance is, with no data loss! Now we'll be able to control robots on Mars and even planets in other solar systems in real-time!

Computer Geek: Woah! Imagine the ping rates I'll get when playing Unreal online! ::insert l33t0r talk::

//end dialog

*cough* skynet *cough*

[Peterius]

*cough* skynet *cough*