A Little Technology Humor (SPOT)

[V1]

I was reading the details in my SPOT user manual. In the Operation
Conditions And Climate section, it lists multiple potential issues,
including:

- If you exceed 700 mph (Mach 1) GPS accuracy degrades

Ahhh, OK - I'll keep that in mind ....
- Frank

[CLewis95]

On Dec 20, 9:56*pm, V1 > wrote:
> I was reading the details in my SPOT user manual. In the Operation
> Conditions And Climate section, it lists multiple potential issues,
> including:
>
> - If you exceed 700 mph (Mach 1) GPS accuracy degrades
>
> Ahhh, OK - I'll keep that in mind ....
> - Frank

Thanks for pointing that out Frank! ... that explains some of the
problems I've been having! :)

Curt - 95
Genesis 2
SGS 1-26B

[Matt Herron Jr.]

On Dec 20, 9:08*pm, CLewis95 > wrote:
> On Dec 20, 9:56*pm, V1 > wrote:
>
> > I was reading the details in my SPOT user manual. In the Operation
> > Conditions And Climate section, it lists multiple potential issues,
> > including:
>
> > - If you exceed 700 mph (Mach 1) GPS accuracy degrades
>
> > Ahhh, OK - I'll keep that in mind ....
> > - Frank
>
> Thanks for pointing that out Frank! ... that explains some of the
> problems I've been having! :)
>
> Curt - 95
> Genesis 2
> SGS 1-26B

I notice a slight red shift in the color of the sky when I fly with
water...

[Francisco De Almeida[_2_]]

>I notice a slight red shift in the color of the sky when I fly with
>water...
>

You fly while looking backwards?

[Grider Pirate]

On Dec 20, 7:56*pm, V1 > wrote:
> I was reading the details in my SPOT user manual. In the Operation
> Conditions And Climate section, it lists multiple potential issues,
> including:
>
> - If you exceed 700 mph (Mach 1) GPS accuracy degrades
>
> Ahhh, OK - I'll keep that in mind ....
> - Frank

Which explains why MY tracks are so incredibly precise!

[[email protected]]

On Dec 21, 2:31*am, "Matt Herron Jr." > wrote:
> On Dec 20, 9:08*pm, CLewis95 > wrote:
>
>
>
>
>
> > On Dec 20, 9:56*pm, V1 > wrote:
>
> > > I was reading the details in my SPOT user manual. In the Operation
> > > Conditions And Climate section, it lists multiple potential issues,
> > > including:
>
> > > - If you exceed 700 mph (Mach 1) GPS accuracy degrades
>
> > > Ahhh, OK - I'll keep that in mind ....
> > > - Frank
>
> > Thanks for pointing that out Frank! ... that explains some of the
> > problems I've been having! :)
>
> > Curt - 95
> > Genesis 2
> > SGS 1-26B
>
> I notice a slight red shift in the color of the sky when I fly with
> water...- Hide quoted text -
>
> - Show quoted text -

Ah- the dreaded red mist. Usually happens to me when I think I might
win. Not afflicted with it all
that much.
UH

[Matt Herron Jr.]

On Dec 21, 2:09*am, Francisco De Almeida > wrote:
> >I notice a slight red shift in the color of the sky when I fly with
> >water...
>
> You fly while looking backwards?

No, actually, it happens as I approach the speed of light.

[Bruce Hoult]

On Dec 22, 7:47*pm, "Matt Herron Jr." > wrote:
> On Dec 21, 2:09*am, Francisco De Almeida > wrote:
>
> > >I notice a slight red shift in the color of the sky when I fly with
> > >water...
>
> > You fly while looking backwards?
>
> No, actually, it happens as I approach the speed of light.

Which is why you meant blue shift, yes?

[Grider Pirate]

>
> No, actually, it happens as I approach the speed of light.
While looking aft.

[Darryl Ramm]

On Dec 22, 7:50*am, Grider Pirate > wrote:
> > No, actually, it happens as I approach the speed of light.
>
> While looking aft.

Matt may be confused or just maybe he is showing off. A relativistic
glider pilot facing forward (and looking around a bit)will observe a
combination of red and blue shift.

Classical Doppler effect is of course inline to the direction of
relative motion. So blue shift going towards and redshift going away.
But relativistic Doppler will redshift objects even those with no line
of motion towards/away form you. The overall red shift/blue shift
shapes into a cone with things to the side of you red shifted as well.
There is a nice 2D animation of the relativistic Doppler cone at
http://en.wikipedia.org/wiki/Relativistic_Doppler_effect.

BTW I hear the new ClearNav vario includes corrections for
relativistic Doppler effects (but no word yet if it will actually talk
to any PDA based soaring software).


Darryl

[Bob Whelan[_3_]]

> On Dec 22, 7:50 am, Grider > wrote:
>>> No, actually, it happens as I approach the speed of light.
>>
>> While looking aft.
>

Ahh...so what's wrong with checking your 6-O'clock all the time? If I've
understood George Moffat correctly, someone *could* be catching up to you
regardless of how well you imagine you're doing!

This time of year, maybe even Rudolph and Santa...

Bob W.

[Richard[_9_]]

On Dec 22, 10:52*am, Darryl Ramm > wrote:
> On Dec 22, 7:50*am, Grider Pirate > wrote:
>
> > > No, actually, it happens as I approach the speed of light.
>
> > While looking aft.
>
> Matt may be confused or just maybe he is showing off. A relativistic
> glider pilot facing forward (and looking around a bit)will observe a
> combination of red and blue shift.
>
> Classical Doppler effect is of course inline to the direction of
> relative motion. So blue shift going towards and redshift going away.
> But relativistic Doppler will redshift objects even those with no line
> of motion towards/away form you. The overall red shift/blue shift
> shapes into a cone with things to the side of you red shifted as well.
> There is a nice 2D animation of the relativistic Doppler cone athttp://en..wikipedia.org/wiki/Relativistic_Doppler_effect.
>
> BTW I hear the new ClearNav vario includes corrections for
> relativistic Doppler effects (but no word yet if it will actually talk
> to any PDA based soaring software).
>
> Darryl


A couple of things come to mind.

Euler's equations

Our world has three spatial dimensions (up-down, left-right, fore-aft)
and one time dimension. In general, the Euler equations have a time-
dependent continuity equation for conservation of mass and three time-
dependent conservation of momentum equations. At the top of the
figure, we show a simplified, two-dimensional, steady form of the
Euler equations. There are two independent variables in the problem,
the x and y coordinates of some domain. There are four dependent
variables, the pressure p, density r, and two components of the
velocity vector; the u component is in the x direction, and the v
component is in the y direction. All of the dependent variables are
functions of both x and y. The differential equations are therefore
partial differential equations and not ordinary differential equations
that you study in a beginning calculus class.


The second more apt sailboat racing term

LTO (lightning tack to oblivion)

Richard
www.craggyaero.com

[Matt Herron Jr.]

On Dec 22, 10:52*am, Darryl Ramm > wrote:
> On Dec 22, 7:50*am, Grider Pirate > wrote:
>
> > > No, actually, it happens as I approach the speed of light.
>
> > While looking aft.
>
> Matt may be confused or just maybe he is showing off. A relativistic
> glider pilot facing forward (and looking around a bit)will observe a
> combination of red and blue shift.
>
> Classical Doppler effect is of course inline to the direction of
> relative motion. So blue shift going towards and redshift going away.
> But relativistic Doppler will redshift objects even those with no line
> of motion towards/away form you. The overall red shift/blue shift
> shapes into a cone with things to the side of you red shifted as well.
> There is a nice 2D animation of the relativistic Doppler cone athttp://en..wikipedia.org/wiki/Relativistic_Doppler_effect.
>
> BTW I hear the new ClearNav vario includes corrections for
> relativistic Doppler effects (but no word yet if it will actually talk
> to any PDA based soaring software).
>
> Darryl

Darryl,

Sadly, I am just confused. It was the glider in front of me shifting
blue, not the sky. So he must have been pulling away from me, yes?

[Andy[_1_]]

On Dec 22, 5:35*pm, "Matt Herron Jr." > wrote:
> On Dec 22, 10:52*am, Darryl Ramm > wrote:
>
>
>
> > On Dec 22, 7:50*am, Grider Pirate > wrote:
>
> > > > No, actually, it happens as I approach the speed of light.
>
> > > While looking aft.
>
> > Matt may be confused or just maybe he is showing off. A relativistic
> > glider pilot facing forward (and looking around a bit)will observe a
> > combination of red and blue shift.
>
> > Classical Doppler effect is of course inline to the direction of
> > relative motion. So blue shift going towards and redshift going away.
> > But relativistic Doppler will redshift objects even those with no line
> > of motion towards/away form you. The overall red shift/blue shift
> > shapes into a cone with things to the side of you red shifted as well.
> > There is a nice 2D animation of the relativistic Doppler cone athttp://en.wikipedia.org/wiki/Relativistic_Doppler_effect.
>
> > BTW I hear the new ClearNav vario includes corrections for
> > relativistic Doppler effects (but no word yet if it will actually talk
> > to any PDA based soaring software).
>
> > Darryl
>
> Darryl,
>
> Sadly, I am just confused. *It was the glider in front of me shifting
> blue, not the sky. *So he must have been pulling away from me, yes?

Just another reason to fly with Sun Tigers. I got my own color shift
even when I fly slow thanks very much!

Andy

[Darryl Ramm]

On Dec 22, 4:35*pm, "Matt Herron Jr." > wrote:
> On Dec 22, 10:52*am, Darryl Ramm > wrote:
>
>
>
> > On Dec 22, 7:50*am, Grider Pirate > wrote:
>
> > > > No, actually, it happens as I approach the speed of light.
>
> > > While looking aft.
>
> > Matt may be confused or just maybe he is showing off. A relativistic
> > glider pilot facing forward (and looking around a bit)will observe a
> > combination of red and blue shift.
>
> > Classical Doppler effect is of course inline to the direction of
> > relative motion. So blue shift going towards and redshift going away.
> > But relativistic Doppler will redshift objects even those with no line
> > of motion towards/away form you. The overall red shift/blue shift
> > shapes into a cone with things to the side of you red shifted as well.
> > There is a nice 2D animation of the relativistic Doppler cone athttp://en.wikipedia.org/wiki/Relativistic_Doppler_effect.
>
> > BTW I hear the new ClearNav vario includes corrections for
> > relativistic Doppler effects (but no word yet if it will actually talk
> > to any PDA based soaring software).
>
> > Darryl
>
> Darryl,
>
> Sadly, I am just confused. *It was the glider in front of me shifting
> blue, not the sky. *So he must have been pulling away from me, yes?

Yes. But I've never observed this when flying. Those fast moving
gliders just tend to disappear. One second I'm in a thermal with Ray
Gimmey then... poof gone. I suspect he is using wormholes.

Darryl

Darryl

[Richard[_9_]]

On Dec 22, 4:58*pm, Darryl Ramm > wrote:
> On Dec 22, 4:35*pm, "Matt Herron Jr." > wrote:
>
>
>
>
>
> > On Dec 22, 10:52*am, Darryl Ramm > wrote:
>
> > > On Dec 22, 7:50*am, Grider Pirate > wrote:
>
> > > > > No, actually, it happens as I approach the speed of light.
>
> > > > While looking aft.
>
> > > Matt may be confused or just maybe he is showing off. A relativistic
> > > glider pilot facing forward (and looking around a bit)will observe a
> > > combination of red and blue shift.
>
> > > Classical Doppler effect is of course inline to the direction of
> > > relative motion. So blue shift going towards and redshift going away.
> > > But relativistic Doppler will redshift objects even those with no line
> > > of motion towards/away form you. The overall red shift/blue shift
> > > shapes into a cone with things to the side of you red shifted as well..
> > > There is a nice 2D animation of the relativistic Doppler cone athttp://en.wikipedia.org/wiki/Relativistic_Doppler_effect.
>
> > > BTW I hear the new ClearNav vario includes corrections for
> > > relativistic Doppler effects (but no word yet if it will actually talk
> > > to any PDA based soaring software).
>
> > > Darryl
>
> > Darryl,
>
> > Sadly, I am just confused. *It was the glider in front of me shifting
> > blue, not the sky. *So he must have been pulling away from me, yes?
>
> Yes. But I've never observed this when flying. Those fast moving
> gliders just tend to disappear. One second I'm in a thermal with Ray
> Gimmey then... poof gone. I suspect he is using wormholes.
>
> Darryl
>
> Darryl- Hide quoted text -
>
> - Show quoted text -

He is using worm holes your using LTOs

Richard

[shkdriver]

So, in addition to red and blue shifts,
In relativistic terms,
Time really does fly when I'm having fun! (to my perception)
I.E. the faster I fly, My flight time appears to take longer (to an observer) than it seems to me!

Merry Christmas!!
Scott W.