NASA Scientists Get Custom 24h39m-per-day Watches 553
blair1q writes "In order to more easily keep solar time on Mars, (or maybe just as a lark) JPL has ordered specially-modified mechanical watches for the Mars Exploration Rover Mission. One wonders why these literal rocket scientists didn't just get a software programmable Linux or PalmOS based wrist-computer and hack together a Mars-time display application into it?"
Useless, but... (Score:5, Funny)
Totally, completely useless. A complete waste of money.
When will they be available to the public? And how much? I want one.
Re:Useless, but... (Score:5, Funny)
Your tax $$ at work.
Re:Useless, but... (Score:4, Informative)
http://executivejewelers.com/mars/
Comes up quite high with relevant Google searches...
Re:Useless, but... (Score:3, Insightful)
Re:Useless, but... (Score:2, Interesting)
Great fun, allows you to prepare for the day Earth goes under and we all move to Mars, and you can start taking 1$ a pop for every person who wants to know what time it is!
Hmm, would normal Earthling solar watches still work? Might set one out of business.
Re:Useless, but... (Score:4, Funny)
How's it go?
As a Martian, I for one welcome our new Earthling overlords!
Re:Useless, but... (Score:2, Funny)
Re:Useless, but... (Score:3, Funny)
Soon... (Score:3, Informative)
If I had a spare couple of grand (they'd have to cost at least that, given they're custom-modified mechanical watches), I'd seriously consider one.
Re:Soon... (Score:5, Insightful)
o These are collectible items available only to NASA Mars project members (for now)
o The creation of these watches took a lot of skull-sweat on the manufacturer's part and is a great accomplishment for him
o It's a team-building device
o It's a Neat Hack(TM) - RTFA.
--That said, I wonder how these watches will hold up over time (pun intended.) IANAWatch Expert but somehow I doubt the length of a Martian second is the same as ours. A more accurate way of keeping time IMHO would be to keep the length of the second the same, and add 39 minutes worth per 24h: an "extended" 12h +19:30m watch face if you like, maybe with a colored "pie slice" for the extra time period - instead of losing seconds. FTA: ( "Past the glass cases of what looks like an ordinary jewelry store is a workshop where watches are losing 39 minutes a day." )
--But like I said, *I* don't have the skill to do this in the 1st place, and maybe he will do a rev
Re:Soon... (Score:3, Informative)
Re:Soon... (Score:3, Informative)
I see what you MEANT to say, but the nit-picker in me is taking over.
A second is our made up period of time, so it's always relative, and will be the same (on Mars, Pluto, Alpha Century).
But if you mean a "second" as 1/86400th of a day (a full rotation of the planet divided into 24 equal hours). Then yes, it's not the same.
1/86400th of the day on Earth would be 1 Earth Second.
1/86400th of the day on Mars would be 1.0274 Earth S
Re:Useless, but... (Score:5, Informative)
21 Jewels, my guess a ETA 2824. (Score:3, Interesting)
Nothing wrong with either but but I'd assume they'd go for a faster beat 25 jewel ETA 2824 or 2892 (which is also 21 jewels but watches with this movt useally retail for a lot more than US$150, even though wholesale the movt is a lot cheaper than what people think)
Re:Useless, but... (Score:4, Informative)
Tell me about it! My toy lust is in overdrive (Score:2)
At the very least, they should finagle a way to get one for Zubrin.
Me? I'm founding a company right now, cobber. Money is kinda scarce at the moment. I'll just have to hope to pick one up later.
*sigh*
Rustin
Re:Useless, but... (Score:3, Informative)
In the FA:
Re:Useless, but... (Score:3, Insightful)
Re:Useless, but... (Score:3, Informative)
Because that suggestion is stupid.
Re:Useless, but... (Score:5, Informative)
Re:Useless, but... (Score:3, Informative)
1. The part about NASA spending millions of dollars to develop the Space Pen. NASA *didn't* develop it, a private company did.
2. The part about NASA wasting taxpayer dollars on the Space Pen. NASA didn't spend very much to acquire those that they did use from the manufacturer, so no waste of taxpayer dollars here.
3. The part about the Russians using pencils, but NASA only using an expensive Space Pen. NASA used pencils too, as well as inexpensive felt tip markers.
So, in short, pretty much all
Re:Useless, but... (Score:4, Informative)
Re:Useless, but... (Score:5, Informative)
Claim: NASA spent millions of dollars developing an "astronaut pen" which would work in outer space while the Soviets solved the same problem by simply using pencils. [snopes.com]
Status: False.
Re:Useless, but... (Score:3, Informative)
Really? I could've sworn it was capillary action.
Pencils = graphite shavings floating around and getting into instrumentation = bad and not used (regular pens should work fine in outer space)
Re:Useless, but... (Score:3, Interesting)
Get the Mars module from CPAN.
Didn't do what you suggested.... (Score:5, Funny)
Because its faster strapping on a watch that works already rather than spending a bunch of hours making the linux solution work...
I remember the good ole days.... (Score:3, Informative)
Re:Didn't do what you suggested.... (Score:5, Interesting)
Forget faster, it's much more elegant. I would take a mechnical watch over a digital, PDA-on-my-arm miracle of technology anyday. I enjoy my mechnical watches, the precision that went into their design.
A good watch is a thing that tickles geeks because it's intricate, precise, mathematical and interesting. You deal with gears and springs in the watchworks....
I have a crystal-backed watch, you can see the mechanism running and it's simply beautiful to watch it as it winds down, ticking off the time in the process.
Puh! (Score:5, Funny)
Re:Puh! (correction) (Score:2)
I need to stop posting while drunk.
Re:Puh! (Score:4, Funny)
Duraking apparently employs someone who knows English. Dinacell isn't so lucky:
"No mercury added... Helps protect our enviroment"
"Dinacell Battrbies"
"Do not charge the batter that hasn't been used up or throw it into fire"
"Do not use it with common (carbolic) batter."
"According to the use way of equipments to install the batter."
And my favorite:
"Do not decompose the batter."
I bought a package of each for posterity.
Comment removed (Score:5, Informative)
Great! (Score:5, Funny)
Now I just need a watch to keep track of that other irregular period
*duck*
Re:Great! (Score:5, Funny)
Because (Score:3, Insightful)
Remember this time people, (Score:2, Funny)
Just a guess... (Score:2)
from the article:
"Garo gets to say, "I told you so" to those who said it couldn't be done."
This IS a hack (Score:5, Interesting)
Mad props to Mr. Anserlian!
Re:This IS a hack, no, it's a clever kludge (Score:4, Informative)
The formula for the oscillation time is
T = 2*pi*sqrt(J/k)
with
J = moment of inertia
k = the spring constant.
It looks like the watches have added weight on de balance wheel. He did a naice job but it is not earth (or mars) shattering.
Nyh
Re:This IS a hack, no, it's a clever kludge (Score:3, Informative)
More precisely, they rely on a mass oscillating under the influence of a spring. That mass (and its associated moment of inertia) st
MARS Attacks (Score:2)
This hit me. While MARS watches are a cool-nerdy thing, it is also indicitave of a secondary pattern--humans mentally divergent behavior to avoid Earthly situations, and instead focus their heads way up past the bombs and pollution into the clouds.
Now when MARS attacks we'll know what time it is.
Survey says... (Score:5, Funny)
Two wonder why these literal rocket scientists need to know what time it is here anyhow...
Three wonder why these literal rocket scientists don't just have really big clocks on the wall, like at the airport...
And four of us want to know why they can't just hire a booth babe to walk around and tell them what time it is... :)
again with the linux.... (Score:5, Insightful)
because mechanical watches are much cooler and act as a souvenir of the project. next, why don't you go ask astronauts to trade in their mission patches for a linux box with the logo as the desktop background. don't expect to be popular with them.
Re:again with the linux.... (Score:3, Interesting)
I remember how, in the late 80's how it was the coolest thing to have a digital wrist watch. They were a -lot- more expensive than an analog watch of similar quality.
Now, digital watches are fairly dirt cheap. Sure, the newer ones are a bit more expensive, and they're always having some new, cool features, but...
They're nowhere near as expensive as, say, a high-quality Rolex. Not only th
Re:again with the linux.... (Score:5, Informative)
N.B.: Among watch afficionadoes, Rolex is something of a joke, mostly because they don't keep time nearly as well as equivalently-priced watches from less-widely-marketed makers (International Watch Co. [www.iwc.ch], Breitling [breitling.com], et al), and partly because of the enormous number of counterfeit [iq-enterprises.com] Rolexen [com.com] in the wild [www.nzz.ch].
And, in case anyone's wondering, the original Moon watch is the Omega Speedmaster Professional [213.120.97.87].
Re:again with the linux.... (Score:4, Interesting)
When was the last time you saw someone desperately tweaking their carbuerator to get their car started? Or pumping the gas, flooding the engine, and turning it over for an eternity trying to clear it? You turn the key and it goes.
Don't even get me started on old, mechanically controlled automatic transmissions. These collections of flywheels, springs, valves, gaskets, and hydraulic clutches are practically works of art.. The result? A lousy transmission which breaks all the time. My friend and I drove an '85 K-5 Blazer (4x4) to Mexico and went thru two automatic transmissions in one trip, I shit you not. The first replacement didn't work, and ended up partially shredding itself. To its credit, AAMCO replaced it free of charge.
Of course, electronic ignition and computerized fuel injection allow spark plugs to go 100,000 miles or more. Did I mention that modern emission standards would be impossible without them? My current car only needs its oil changed every 10,000 miles, for goodness sake.
Re:again with the linux.... (Score:3, Insightful)
It's time for a non-Earth based time standard (Score:2, Interesting)
Re:It's time for a non-Earth based time standard (Score:4, Funny)
Re:It's time for a non-Earth based time standard (Score:2, Insightful)
Another word on standardization: what would you standardize
Re:It's time for a non-Earth based time standard (Score:5, Funny)
I'm still wondering how they will account for such things as time standing still for Joshua.
Re:It's time for a non-Earth based time standard (Score:2)
Let's see... today I show up at 10:32, tomorrow it's 43:16
Linux watches?! (Score:5, Insightful)
Why must everything on Slashdot be Linux-based?! If they were going to make a watch on a different time system to normal then wouldnt it make more sense to just build a slightly different watch? Analogue you just add a few more teeth to the gears and digital shouldn't be too hard to alter. Putting Linux on a watch is just silly.
Re:Linux watches?! (Score:5, Interesting)
Not to knock Linux or anything, but if the problem statement is "I want a watch to keep track of Martian time on my wrist wherever I go", the answer is a custom circuit in a digital watch (probably an extra capacitor or two), or a slightly larger gear in a mechanical watch. I think it's pretty obvious that you can write a Javascript Mars clock for your computer in about 5 minutes. I'd like to assume that NASA already came up with that idea.
Java Watches! (Score:3, Informative)
Done and done [nasa.gov].
There is a palm version out there, too, though, IMHO, it doesn't work all that well. Or, more accurately, it doesn't meet the standard set by this program.
Re:Linux watches?! (Score:2, Funny)
So I would find the unbiased news where now?
No, one does not (Score:5, Interesting)
It is always such a relief to know that Slashdot readers know more about Astronauts should do and use than NASA engineers.
Maybe that was a bit harsh, but have you ever seen a sophisticated piece of consume electronics, such as a Palm Pilot or laptop, taken along with astronauts on their missions?
Electronics in space have to be able to handle conditions that your favorite PDA engineers did not exactly have in mind--even on an astronauts wrist. Notice that the watch is not even digital, and that if you think about it, it is probably not because the Engineers didn't read The Hitchhiker's Guide.
Re:No, one does not (Score:2)
Re:No, one does not (Score:2)
I'm sure PDAs are reliable enough when they are used on mother earth.
/greger
Re:No, one does not (Score:5, Informative)
http://www.icmfg.com/
A standard Tera Firma digital watch crystal frequency is 32.768 kHz.
They are listed here.
http://www.icmfg.com/surfacemount_crystals.html
It would be a small task to get custom crystals made for the Martian day from them for your watch. You may need SMD tools to change it.
At the bottom of the page gives informatin for ordering non standard frequencies.
IMPORTANT: When ordering any non-standard crystals, please specify series or parallel resonance. If parallel, the load capacitance (CL) needs to be specifed in picofarads___ pF. All specifications are subject to change without notice.
Digital watch design (Score:5, Informative)
Hacking a digital watch is nontrivial, especially if you have the same size and power consumption requirements as the original watch. The power budget of digital watches is austere, to say the least; typical drain of the entire watch, including oscillator, divider chain, and display driver, is 500 nA at 1.5 V, or 750 nW (a nanowatt is one billionth of a Watt).
Watches use 32.768 kHz AT-strip (tuning fork-style) quartz crystals (like these [ecliptek.com]) as a compromise between size and low power consumption. The smaller the size of a crystal operating in a given mode of oscillation, the higher the frequency of oscillation. However, the power consumption of a digital switching circuit increases directly with the switching frequency (it is P (Watts) = CV^2f, where C is the capacitance of the switching device in Farads, V is the difference in volts between a logical 1 and a logical 0, and f is the frequency of switching in Hz). Having a higher oscillation frequency requires a longer frequency divider to divide the oscillator's output down to the required 1 Hz output, which raises the power consumption of the divider (mostly due to the higher switching frequency of the first few stages).
Having the crystal oscillate at a binary multiple of the desired output (32768 = 2^15) makes the divider circuits especially simple (15 divide-by-two stages in series). Having a non-binary multiple would require more switching circuitry and add to power consumption.
To hack such a system to Mars time would require either changing the crystal frequency or the divider string. Changing the divider string would require modifying the watch chip, a design task that would be relatively simple, digital design tools being what they are, but expensive and time-consuming, since a new IC mask set would have to be generated and a new lot of chips run through the fab--say, $250k and 3-6 months, if you started today. Not very desirable if you're a JPL guy funding this out of your own pocket (which is how this was done).
The alternative is to modify the crystal frequency. AT-strip tuning-fork watch crystals are cheap because they're made in a lithographic manner not dissimilar to that of IC production--a mask is made, resist is printed over a quartz blank, the blank is etched, etc. This produces nearly-identical parts in bulk, making them cheap. This is different from the standard AT-cut crystals with which most amateurs are familiar; AT-cut crystals are individually cut and polished to frequency. Since AT-strip crystals are made in bulk, one cannot get a small lot of them inexpensively, as one can AT-cut crystals; the manufacturer must make a new mask set for the new frequency, a relatively expensive task if one will only purchase, say, a hundred crystals. Modifying the crystal frequency is less expensive than making a new watch chip; however, neither option is suitable for the volumes and price points the JPL guys were trying to hit. Ergo, the mechanical watch.
Re:No, one does not (Score:2)
The fuel-burn calculations for certain kinds of Space Shuttle orbiter maneuvering are performed on (old) HP scientific programmable calculators on the shuttles while in flight (unless they've upgraded in the last few years).
I bet my Palm V could handle launch conditions no sweat.
Re:No, one does not (Score:2)
Yes, laptops, they run Windows, and you can read about the scheduled reboots here [spaceref.com] in the status reports.
HGttG (Score:2)
Why you ask? (Score:5, Interesting)
1. Generally speaking digital watches are fugly. There's no Movado Digital Watch for a reason.
2. Commitment. This watch will ALWAYS run ~24h39m. You can give it to your grandkids. Your crap-ass programmable digital watch won't make it that far. Also, it can be made back into a 24h watch. There are no digital watch family heirlooms.
3. A mechanical watch is a thing of craftsmanship and beauty. A watch running Windows or Linux is cute for maybe 10 minutes then its a watch that does so many other things that they forgot the "tells time" part.
Re:Why you ask? (Score:2)
Are these the fugly digital watches [reussilles.com] you had in mind?
These are not astronaut launches (Score:2)
Anymore Information? (Score:2)
Re:Anymore Information? (Score:5, Interesting)
The long version is written up here [jardinescustom.com] . The short version is: A handicapped friend had an unusual and extraordinary need. We met up with a master gunsmith who was so fascinated by this new challenge he'd never had before that he swept us to the head of the line despite having weeks of backlog and spent a weekend machining this unique one-off item for us. Oh and then, because "you couldn't afford to pay what this actually cost," refused to accept money for it.
We're (pretty much) all geeks here. We're all attracted to that challenge, to that thing we've never done before. I know I'm much more likely to do something for free (or at least below market rates) if it's interesting and unusual than if it's yet another damned system administration task. I know I'm not alone in our field, and my experience suggests that masters of the more mechanical arts are often similar in their attraction to the unusual job. Especially given the small number of people who'd be worthy of having such a watch, and the fact that this isn't being asked for for-profit, I would't be surprised if this guy cut them a break on it if NASA wasn't paying.
Re:Anymore Information? (Score:3, Interesting)
I saw in From the Earth to the Moon that the team leader of Apollo 12 bought his 2 crewmembers and himself matching Corvettes!!! So as you can see, NASA people are very internally-generous
Because.... (Score:4, Insightful)
Some of the mechanical watches with complications, like a perpetual calendar (keeps track of day, date and even leap year so you never have to reset the date) that has a wheel that revolves once every four years, are truly engineering marvels. Then there are tourbillons, repeaters, etc...all great feats of skill. I would buy one of these watches just for the skill involved in designing and testing it.
I would think slashdotters would understand doing something fairly "out there" just for the sake of doing it. And these are very useful. Granted useful for a small number of users, but useful nonetheless.
Now, how about a Beowulf cluster of Timex Sinclairs?
'Cuz Digital Sucks? (Score:3, Interesting)
I think that as geeks, we all (well, most of us -- I don't have arms, you insensitive clod!) go through the phase where we want that digital watch that has EVERYTHING. It should have at least two different clocks! And a stopwatch! And two timers! And, umm, a calculator. While we're at it, throw a little game in there (I seem to recall one of my first watches had a Simon Says game). Hell, these days, you can get a watch with a USB connection.
Nothing wrong with that, mind you, but at some point some of us change our preferences. Maybe it's because I spend my time on computers 85% of my waking hours, but I've become fond of such things as writing letters with a fountain pen on some nice vellum paper -- Coinciding with my preference for simple, elegant analog watches. This watch on my wrist can't do much -- it tells the time, and the date, and actually has an alarm, but that's about it. It won't tell me what time it is in Hong Kong and it's not heavy enough to kill someone with blunt trauma like those big Citizens. But you know what? I like it. It's light, it's thin, and it looks pretty on my wrist.
I don't mean to suggest there's some sort of 'maturity' that causes some of us to like analog watches -- liking analog watches isn't better than liking digital watches, just different. It's not the height of efficiency, but
If I could afford it and I had the same problem, I'd have gone for mechanical watches too. I'd buy one of these, but I'd feel like a total poseur.
Re: (Score:2)
Because (Score:2)
Hacking the physical world is much more l33t?
Great Think Geek gift (Score:3, Interesting)
What's the matter boss? (Score:2)
Ben
they'll still be working odd hours here on earth (Score:2)
Too... Many.... Links!!! (Score:2, Funny)
Head... about... to... EXPLODE!!! [mit.edu]
What about calendars? (Score:5, Interesting)
Now, with the Mars day being slightly longer than the Earth day and there are watches to match this, how do they reckon the days there? Here on Earth there is the system of Julian Days, which serves well for Earth-bound day-counting and marking dates of interesting events. This, like the UTC clock, seems to be very Earth-centric.
So are anyone contemplating a Martian calendar, or some kind of linear numbering of Mars Days, so there will be a logical date for when the various Rovers and others have landed, and other interesting events?
For all I know, such a calendar may already exist, but all I have seen of it has been various science-fiction books.
Re:What about calendars? (Score:3, Insightful)
http://mars.complete-isp.com/time/zubrin.html [complete-isp.com]
NASA has an Applet [nasa.gov] showing the current time on Mars.
Offtopic - NASA is really embracing Java lately. At least parts of the control and visualising software for the current mission uses Java, including Java 3D [sun.com]. Java not ready for user interfaces eh?
They also certainly seem to be considering Java and Linux [sdtimes.com] for future missions and have built a concept vehicle using it [findarticles.com]. The SD times article is very preachy, and I
Re:What about calendars? (Score:3, Informative)
Indeed. The software we used to command both rovers during cruise is written in Java (I wrote it!); we're using the same software to command them on the surface as well. (The surface commanding is actually done with an integrated mix of software -- my half is in Java; the other half, the 3-D visualization stu
collectables (Score:3, Insightful)
Because in 10 years, a PalmOS watch is just a clucky, very outdated piece of plastic, while these will be collectable, a nice reminder for the team members who took part, and, well, basically cool. I say 'well done' since this was obviously oganised by a couple of the guys in their spare time.
Since these are eventually going to be sold to the public I'd hope the team all get their's engraved and/or made unique in some way.
Beagle 2 (Score:3, Funny)
Ah, these would be the limitied edition 'Beagle 2' watches.
Because sometime high tech isn't the solution. (Score:3, Interesting)
Besides which, modifying mechanical watches is a cool hack, although old school. Maybe you kids wouldn't approve, but guys like the TMRRC would want one so they could take it apart and do it themselves.
More disconcerting is the quote from the article;
One hopes the amazement is on the part of the JPL staffer, and not on the part of the master watchmaker. Such accuracy used to be commonplace on all but the cheapest mechanical watches. Or maybe since most market watches (as opposed to chronometers) are marketed for fashion rather than accuracy nowadays, it is astounding for a modern watch.Next week's ThinkGeek Ad... (Score:3, Funny)
360 degree Panorama (Score:3)
Hamilton Levitt-Mentzer Mars Clock (Score:3, Interesting)
It's a fascinating timepiece, with a 16-inch diameter, a 24-hour face and almost 400 working parts. It could even keep track of the difference in calendar measurements between earth and Mars.
However, apparently only two of these clocks were ever built. One is at the Smithsonian Institution and the other resides at the National Watch and Clock Museum [nawcc.org] (and the clock seems to be visible on this page [nawcc.org]).
Other ideas for Martian timekeeping... (Score:5, Interesting)
All clocks stop at midnight, wait 40 minutes, then tick over to 00:01
(Yes, there are practicality and "yes, but *WHAT'S the TIME*??!?" issues, but I still reckon it'd be cool)
Oh Man! I didn't realise! (Score:3, Funny)
I could have just told her it was a Mars Watch, but instead I get it "fixed" to show plain old boring GMT. Darn.
There could be a rational reason for the watches (Score:3, Informative)
It's all simple politics... (Score:3, Funny)
They're rocket scientists. (Score:4, Insightful)
Maybe it's because they've got better things to do with their time?
Why not? My question is "why?". (Score:3, Insightful)
Because that would be pointless?
All they had to do was change a few gear ratios instead of actually figuring out how to use linux, or getting an SDK for PalmOS, then actually writing the program and hope there's no bugs in it.
They're rocket scientists... not script kiddies who lavish in anything that is related to linux. (Go ahead, call me a troll... you know it's true)
The real question should be why they even needed to do it. It's not like knowing the time on mars is a huge deal.
Accuracy (Score:3, Informative)
Keep in mind that these guys need much more precision than your average joe, kinda like the railmen back in the day. It's not like they can tell the rover to get up at eleven-thirty-ish, wander over to that dune and shoot us back an e-mail. If they're a few seconds off they'll end up talking to the elvis-face instead of the mars rover.
Why not just use a palmtop computer? (Score:3, Insightful)
Because they're keepsakes. Besides, mechanical watches are durable. When the hero sets the bomb that collapses the mouth of the only cave that leads to the underworld in which the Martians are preparing their invasion force, you can be damned sure that he'll be glad he's got a watch that survived all those pulse weapons and electric torture lassos and whatnot, so that he's quite sure he's got three seconds to blast off before the whole planet goes Kaboom!.
Or whatever.
More importantly, they're collectables. All the astronauts are given hardware that they get to take home after the mission as a keepsake. I mean, if these guys are going to make the only form of travel more dangerous than ValuJet for like three months each way without peanuts solely for the sake of our curiosity, then we can god damned well buy them a watch.
Why not a palm pilot application? (Score:3, Insightful)
Re:do the right thing (Score:5, Funny)
Re:Um, because they're rocket scientists (Score:2)
They're not watchmakers either since JPL has ordered specially-modified mechanical watches. Since they were also presumably ordering some custom software, this should have been in the list.
Re:Are they still taking orders? (Score:3, Informative)
You can have one! Just not yet, and who knows at what cost...
After he accommodates all rover team members who wish to own a custom-made Mars watch, he will market his patented rarity to the public.
Re:How about a 24 (0x18) hour watch? (Score:2)
I have no idea what watch you are talking about. But if they count from 1 to 24 on for the hours, as opposed to 0 to 23 and they have a symbol for both 1 and 0, then the implied digit is simple. A number between 1 and 24 in binary always begins with a one, so you can leave it off. ''(1) '0'(2) '1'(3) '00'(4) '01'(5) etc etc
This is idea is also used to save a bit in IEEE floating point, where the special strings of all zeros and all zeros except for