| Topic: |
Science > Physics |
| User: |
"Sam Wormley" |
| Date: |
03 Sep 2004 08:28:32 AM |
| Object: |
NIST unveils smallest atomic clock |
Ref: http://physicsweb.org/article/news/8/9/2
NIST unveils smallest atomic clock
3 September 2004
The precision of atomic clocks could soon be available in handheld
devices such as cell phones, radios and GPS receivers thanks to a
breakthrough at the US National Institute of Standards and Technology
(NIST) in Boulder, Colorado. By exploiting microfabrication technology,
researchers at NIST have made the world's smallest atomic clock.
Measuring about the same size as a grain of rice, the inner workings of
the clock are about 100 times smaller than current designs and consume
less than 75 mW of electrical power (App. Phys. Lett. 85 1460).
See: http://physicsweb.org/article/news/8/9/2
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| User: "" |
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| Title: Re: NIST unveils smallest atomic clock |
03 Sep 2004 10:14:51 AM |
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Sam Wormley <swormley1@mchsi.com> wrote:
Ref: http://physicsweb.org/article/news/8/9/2
NIST unveils smallest atomic clock
3 September 2004
The precision of atomic clocks could soon be available in handheld
devices such as cell phones, radios and GPS receivers thanks to a
breakthrough at the US National Institute of Standards and Technology
(NIST) in Boulder, Colorado. By exploiting microfabrication technology,
researchers at NIST have made the world's smallest atomic clock.
Measuring about the same size as a grain of rice, the inner workings of
the clock are about 100 times smaller than current designs and consume
less than 75 mW of electrical power (App. Phys. Lett. 85 1460).
See: http://physicsweb.org/article/news/8/9/2
Isn't the time precision of a cell phone that of the sent signal which
could be as precise as an atomic clock if anyone wanted to bother? What use
is time to microseconds on a cell phone?
Of what possible use is time to microseconds in a radio?
Isn't the time precision of GPS already that of atomic clocks and isn't
that part of the reason GPS exists?
In any case, to be used as a clock this thing still has to by syncronized
with UTC, which takes a lot more hardware, such as a GPS receiver at
least.
Why not call this thing what it is, a precise and stable oscillator and
frequency reference?
Sounds like a solution in search of a problem.
--
Jim Pennino
Remove -spam-sux to reply.
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| User: "Ken Muldrew" |
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| Title: Re: NIST unveils smallest atomic clock |
03 Sep 2004 12:54:14 PM |
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wrote:
Why not call this thing what it is, a precise and stable oscillator and
frequency reference?
Sounds like a solution in search of a problem.
They could throw it in a wristwatch. That might make more sense than
all those fancy electronic gadgets.
Ken Muldrew
kmuldrezw@ucalgazry.ca
(remove all letters after y in the alphabet)
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| User: "" |
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| Title: Re: NIST unveils smallest atomic clock |
03 Sep 2004 01:14:50 PM |
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Ken Muldrew <kmuldrezw@ucalgazry.ca> wrote:
jimp@specsol-spam-sux.com wrote:
Why not call this thing what it is, a precise and stable oscillator and
frequency reference?
Sounds like a solution in search of a problem.
They could throw it in a wristwatch. That might make more sense than
all those fancy electronic gadgets.
Ken Muldrew
kmuldrezw@ucalgazry.ca
(remove all letters after y in the alphabet)
Egregious overkill; a good crystal is more than good enough for a watch,
but nobody would pay the price for a watch with a good crystal.
The only practical application that comes to mind is a reference for
test equipment.
--
Jim Pennino
Remove -spam-sux to reply.
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| User: "tj Frazir" |
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| Title: Re: Giant unveils smallest atomic GPS |
03 Sep 2004 06:42:49 PM |
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the sigless just got smaller .
It wount be a shirt pocket idem because the matchbox clock got shrunk
..
Now I can put a sigless GPS in anything.
COOL,,,Ill get sigless in glasses .
The cam fits in pen , the clock fits in the end.
I can float a ball in a vaccuume and watch the angle the earth turns and
watch its rotoation with a rotating clock even smaller now.
The pen is the chip its self.
a chamber in a drop with a vaccume inside where a molicule floats in
very thin air with a pice of metel inside.
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| User: "" |
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| Title: Re: Giant unveils smallest atomic GPS |
03 Sep 2004 07:08:01 PM |
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tj Frazir <GravityPhysics@webtv.net> wrote:
nothing
The crazy loon is just babbling again.
--
Jim Pennino
Remove -spam-sux to reply.
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| User: "Morituri-Max" |
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| Title: Re: Giant unveils smallest atomic GPS |
03 Sep 2004 11:21:39 PM |
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tj Frazir wrote:
the sigless just got smaller .
child child child... sigh.. run along now before you hurt yourself.
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