Re: [LEAPSECS] DUT1 = 0

2022-07-14 Thread Daniel R. Tobias 
On 6 Jul 2022 at 15:38, Billy Croan wrote:

> I'd love to know, if there was some physics student on this list, how
> much energy would it consume to physically alter the earth's rotation
> instead of using leap seconds.  Yeah, moving the world sounds like a
> de-facto 'can't be done' scenario.

Superman did it in his1978 movie. Somehow that turned back time and 
brought Lois Lane back from death.

-- 
== Dan ==
Dan's Mail Format Site: http://mailformat.dan.info/
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Re: [LEAPSECS] DUT1 = 0

2022-07-11 Thread Billy Croan 
Indeed.  I much enjoyed reading the translation I was able to find called
"Topsy-Turvy".  My first Verne novel.

https://gutenberg.org/ebooks/10547

Everyone, remember to shut off your phones when you're coding!

On Fri, Jul 8, 2022 at 3:52 PM Richard Clark s  wrote:

> Members of the list may find some amusement in 'Sans dessus dessous'
> by Jules Verne.
> English translations have appeared under the titles 'The Purchase of
> the North Pole' and
> 'The Earth Turned Upside Down'. It relates the further schemes and
> adventures of the leaders
> of the Baltimore Gun Club. Their activities would certainly be of
> interest to the IERS.
>
> Richard
>
> On Thu, Jul 7, 2022 at 1:30 AM Brooks Harris  wrote:
> >
> > THE PLANET INSIDE
> > Scientists are probing the secrets of the inner core—and learning how it
> might have saved life on Earth
> >
> https://www.science.org/content/article/scientists-probing-secrets-earths-inner-core-saved-life-planet
> >
> > An accelerating high-latitude jet in Earth’s core
> > https://eprints.whiterose.ac.uk/108112/1/accepted_version.pdf
> >
> > Measurement of diurnal and semidiurnal rotational variations and tidal
> parameters of Earth
> >
> https://www.researchgate.net/publication/4681204_Measurement_of_diurnal_and_semidiurnal_rotational_variations_and_tidal_parameters_of_Earth
> >
> > Ocean and atmospheric tides standards (used for EIGEN gravity field
> modeling)
> >
> https://iers-conventions.obspm.fr/content/supporting_material/chapter6/BIPM_ocean_tides_2007.pdf
> >
> > "Prediction is difficult, especially about the future."
> >
> > -Brooks
> >
> >
> > On 2022-07-06 4:38 PM, Billy Croan wrote:
> >
> > Interesting that the reversal in direction for the first time in two
> decades (maybe more?) is continuing.
> >
> > I wonder if they will announce the cause of these adjustments.  i.e. a
> specific hurricane or earthquake or interstellar solar radiation?
> >
> > IERS' website leaves much to be desired.
> >
> > I'd love to know, if there was some physics student on this list, how
> much energy would it consume to physically alter the earth's rotation
> instead of using leap seconds.  Yeah, moving the world sounds like a
> de-facto 'can't be done' scenario.
> >
> > But we're talking an extremely small difference in rotation over the
> course of ten years.  If all aircraft landed (and used their brakes) in the
> same direction, would that impart a measurable spin over the course of a
> decade?  Could a few large gyros, operating continuously for a decade, even
> out the spin?  Would their energy cost over that time be more than the cost
> of the software bugs that leap seconds effervesce?
> >
> > On Wed, Jul 6, 2022 at 2:09 PM John Sauter via LEAPSECS <
> leapsecs@leapsecond.com> wrote:
> >>
> >> I hope everyone noticed that the IERS issued Bulletin D 142 today,
> >> which raises DUT1 from -0.1 to 0 as of July 28.  I attach the bulletin
> >> and my chart of values of DUT1.  I predict a negative leap second
> >> around the end of this decade.
> >> John Sauter (john_sau...@systemeyescomputerstore.com)
> >> --
> >> get my PGP public key with gpg --locate-external-keys
> >> john_sau...@systemeyescomputerstore.com
> >>
> >> ___
> >> LEAPSECS mailing list
> >> LEAPSECS@leapsecond.com
> >> https://pairlist6.pair.net/mailman/listinfo/leapsecs
> >
> >
> > ___
> > LEAPSECS mailing list
> > LEAPSECS@leapsecond.com
> > https://pairlist6.pair.net/mailman/listinfo/leapsecs
> ___
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> LEAPSECS@leapsecond.com
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Re: [LEAPSECS] DUT1 = 0

2022-07-08 Thread Richard Clark s 
Members of the list may find some amusement in 'Sans dessus dessous'
by Jules Verne.
English translations have appeared under the titles 'The Purchase of
the North Pole' and
'The Earth Turned Upside Down'. It relates the further schemes and
adventures of the leaders
of the Baltimore Gun Club. Their activities would certainly be of
interest to the IERS.

Richard

On Thu, Jul 7, 2022 at 1:30 AM Brooks Harris  wrote:
>
> THE PLANET INSIDE
> Scientists are probing the secrets of the inner core—and learning how it 
> might have saved life on Earth
> https://www.science.org/content/article/scientists-probing-secrets-earths-inner-core-saved-life-planet
>
> An accelerating high-latitude jet in Earth’s core
> https://eprints.whiterose.ac.uk/108112/1/accepted_version.pdf
>
> Measurement of diurnal and semidiurnal rotational variations and tidal 
> parameters of Earth
> https://www.researchgate.net/publication/4681204_Measurement_of_diurnal_and_semidiurnal_rotational_variations_and_tidal_parameters_of_Earth
>
> Ocean and atmospheric tides standards (used for EIGEN gravity field modeling)
> https://iers-conventions.obspm.fr/content/supporting_material/chapter6/BIPM_ocean_tides_2007.pdf
>
> "Prediction is difficult, especially about the future."
>
> -Brooks
>
>
> On 2022-07-06 4:38 PM, Billy Croan wrote:
>
> Interesting that the reversal in direction for the first time in two decades 
> (maybe more?) is continuing.
>
> I wonder if they will announce the cause of these adjustments.  i.e. a 
> specific hurricane or earthquake or interstellar solar radiation?
>
> IERS' website leaves much to be desired.
>
> I'd love to know, if there was some physics student on this list, how much 
> energy would it consume to physically alter the earth's rotation instead of 
> using leap seconds.  Yeah, moving the world sounds like a de-facto 'can't be 
> done' scenario.
>
> But we're talking an extremely small difference in rotation over the course 
> of ten years.  If all aircraft landed (and used their brakes) in the same 
> direction, would that impart a measurable spin over the course of a decade?  
> Could a few large gyros, operating continuously for a decade, even out the 
> spin?  Would their energy cost over that time be more than the cost of the 
> software bugs that leap seconds effervesce?
>
> On Wed, Jul 6, 2022 at 2:09 PM John Sauter via LEAPSECS 
>  wrote:
>>
>> I hope everyone noticed that the IERS issued Bulletin D 142 today,
>> which raises DUT1 from -0.1 to 0 as of July 28.  I attach the bulletin
>> and my chart of values of DUT1.  I predict a negative leap second
>> around the end of this decade.
>> John Sauter (john_sau...@systemeyescomputerstore.com)
>> --
>> get my PGP public key with gpg --locate-external-keys
>> john_sau...@systemeyescomputerstore.com
>>
>> ___
>> LEAPSECS mailing list
>> LEAPSECS@leapsecond.com
>> https://pairlist6.pair.net/mailman/listinfo/leapsecs
>
>
> ___
> LEAPSECS mailing list
> LEAPSECS@leapsecond.com
> https://pairlist6.pair.net/mailman/listinfo/leapsecs
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Re: [LEAPSECS] DUT1 = 0

2022-07-06 Thread Brooks Harris 

THE PLANET INSIDE
Scientists are probing the secrets of the inner core---and learning how 
it might have saved life on Earth

https://www.science.org/content/article/scientists-probing-secrets-earths-inner-core-saved-life-planet

An accelerating high-latitude jet in Earth's core
https://eprints.whiterose.ac.uk/108112/1/accepted_version.pdf

Measurement of diurnal and semidiurnal rotational variations and tidal 
parameters of Earth

https://www.researchgate.net/publication/4681204_Measurement_of_diurnal_and_semidiurnal_rotational_variations_and_tidal_parameters_of_Earth

Ocean and atmospheric tides standards (used for EIGEN gravity field 
modeling)

https://iers-conventions.obspm.fr/content/supporting_material/chapter6/BIPM_ocean_tides_2007.pdf

"Prediction is difficult, especially about the future."

-Brooks


On 2022-07-06 4:38 PM, Billy Croan wrote:
Interesting that the reversal in direction for the first time in two 
decades (maybe more?) is continuing.


I wonder if they will announce the cause of these adjustments.  i.e. a 
specific hurricane or earthquake or interstellar solar radiation?


IERS' website leaves much to be desired.

I'd love to know, if there was some physics student on this list, how 
much energy would it consume to physically alter the earth's rotation 
instead of using leap seconds.  Yeah, moving the world sounds like a 
de-facto 'can't be done' scenario.


But we're talking an extremely small difference in rotation over the 
course of ten years.  If all aircraft landed (and used their brakes) 
in the same direction, would that impart a measurable spin over the 
course of a decade?  Could a few large gyros, operating continuously 
for a decade, even out the spin?  Would their energy cost over that 
time be more than the cost of the software bugs that leap seconds 
effervesce?


On Wed, Jul 6, 2022 at 2:09 PM John Sauter via LEAPSECS 
mailto:leapsecs@leapsecond.com>> wrote:


I hope everyone noticed that the IERS issued Bulletin D 142 today,
which raises DUT1 from -0.1 to 0 as of July 28.  I attach the bulletin
and my chart of values of DUT1.  I predict a negative leap second
around the end of this decade.
John Sauter (john_sau...@systemeyescomputerstore.com
)
-- 
get my PGP public key with gpg --locate-external-keys

john_sau...@systemeyescomputerstore.com


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Re: [LEAPSECS] DUT1 = 0

2022-07-06 Thread Billy Croan 
Interesting that the reversal in direction for the first time in two
decades (maybe more?) is continuing.

I wonder if they will announce the cause of these adjustments.  i.e. a
specific hurricane or earthquake or interstellar solar radiation?

IERS' website leaves much to be desired.

I'd love to know, if there was some physics student on this list, how much
energy would it consume to physically alter the earth's rotation instead of
using leap seconds.  Yeah, moving the world sounds like a de-facto 'can't
be done' scenario.

But we're talking an extremely small difference in rotation over the course
of ten years.  If all aircraft landed (and used their brakes) in the same
direction, would that impart a measurable spin over the course of a
decade?  Could a few large gyros, operating continuously for a decade, even
out the spin?  Would their energy cost over that time be more than the cost
of the software bugs that leap seconds effervesce?

On Wed, Jul 6, 2022 at 2:09 PM John Sauter via LEAPSECS <
leapsecs@leapsecond.com> wrote:

> I hope everyone noticed that the IERS issued Bulletin D 142 today,
> which raises DUT1 from -0.1 to 0 as of July 28.  I attach the bulletin
> and my chart of values of DUT1.  I predict a negative leap second
> around the end of this decade.
> John Sauter (john_sau...@systemeyescomputerstore.com)
> --
> get my PGP public key with gpg --locate-external-keys
> john_sau...@systemeyescomputerstore.com
>
> ___
> LEAPSECS mailing list
> LEAPSECS@leapsecond.com
> https://pairlist6.pair.net/mailman/listinfo/leapsecs
>
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[LEAPSECS] DUT1 = 0

2022-07-06 Thread John Sauter via LEAPSECS 
I hope everyone noticed that the IERS issued Bulletin D 142 today,
which raises DUT1 from -0.1 to 0 as of July 28.  I attach the bulletin
and my chart of values of DUT1.  I predict a negative leap second
around the end of this decade.
John Sauter (john_sau...@systemeyescomputerstore.com)
-- 
get my PGP public key with gpg --locate-external-keys
john_sau...@systemeyescomputerstore.com

  INTERNATIONAL   EARTH   ROTATION AND REFERENCE SYSTEMS  SERVICE   (IERS) 
SERVICE INTERNATIONAL DE LA ROTATION  TERRESTRE ET DES SYSTEMES DE REFERENCE


SERVICE DE LA ROTATION TERRESTRE
OBSERVATOIRE DE PARIS   
61, Av. de l'Observatoire 
75014 PARIS (France)
Tel. 33 (0) 1 40 51 23 35  
http://iers.obspm.fr
email: services.i...@obspm.fr  Paris,  6 July 2022

   Bulletin D 142


 

   ANNOUNCEMENT OF DUT1


From the

  28 July 2022, 0h UTC

until further notice, the value of DUT1 to be disseminated with the 
time signals will be


  DUT1 = 0.0 s
  

Bulletin D 143 should be issued in 2023
 
 
  
To unsubscribe: 
http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html 
 

 


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