Hoe werkt GPS ?

Duration: 8 minutes and 36 seconds

Country: Netherlands

Language: Dutch

License: Public Domain

Genre: Documentary

Views: 767 (10 embedded)

Posted by: iahpostmes on Feb 27, 2008

Uitzending van het Progamma "Die sendung mit der Maus" van de WDR. De meest heldere uitleg die je maar kunt bedenken over hoe GPS nu eigenlijk werkt. Broadcast 29-04-2007

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Today I have an appointment with the television
I get into my car .......
and because I am the proud owner of a new navigation system ....
I just type the address where I need ..............
Cologne, Nordrhein Westfalen .... ..... the street ......
Apellhofplatz .... the WDR
I choose the shortest route .... so ....
and now the computer calculates the correct route
I put the belt .... and here we go
"Go left about 90 meters"
The friendly voice from the machine tells me now that I have left to save.
in the Schlossstrasse
and then
it goes straight
and right on the Dusseldorferstrasse
true .... very ......
and continuing the
..... And here he tells what direction I need to eliminate ......
"After 50 meters turn right"
.... And the voice says I should go right to the Muhlemerbrucke
.... And while I drive across the Rhine moves the pointer over the card with
But how does it work with that computer in the car ...
how the system knows where I am?
The computer is stored in a card as you can see here
and because you can not see the computer but I do like the navigation myself am .....
I have the card ..... ok ...... I went to Egon Strasse
that is my starting point
from there I wanted to ...... Appelhof the square where the WDR is ...
The Appelhof Platz is somewhere in the city .... that I need to find
there ... there is Appelhof Platz ....
that's my goal
and now I only find the way that I should drive
I just write that
As before,
left deflect the Schloßstraße.
Then right,
in the DusseldorferstraBe.
Then right over the bridge Müllheimer.
And so on, and so on ....
Once again ....
Do I have links to Apollo Flat, and then park because I've reached my destination.
I have a thick package of index cards, with the way I should ride.
In the computer, the navigation system is exactly the same thing happens.
Who has a long list, with the way I should ride.
First Left deflect the SchlossstraBe.
I did.
Then ...
Right deflect the DusseldorferstraBe.
And then right over the bridge Mülheimer.
And exactly that is also in the computer of the navigation system.
But how does he know where I am today?
I can read street signs, but what the computer can read?
How does he know where I stand?
The computer will help.
From very far from over.
This is our earth, natural model.
And in the middle of germany, my car, even in model.
And where is the help ......?
That's the help!
Ofja a part of it ....
This is a satellite
Many of these satellites are flying around the Earth.
And help navigation satellites.
Its so ....
On earth, the car navigation system, and far above the earth's satellite.
And they sent a satellite signal, and the navigation system captures the signal.
Like a radio station, only a navigation system.
And this signal from the computer calculates the navigation system, which is the distance between the satellite and the car.
That is about this spring.
The problem is that you still do not know where you are on earth.
Then there are many places on earth, which is exactly the same range of the satellite have.
This whole group, these countries are equally far away from the satellite.
Therefore there is a second satellite.
And here it is true that the computer knows exactly how far it is between the vehicle and the satellite.
And here it is again the same as the first satellite, many points on the earth where the network where the satellite is away.
But there are now two points where these circles are taken, they intersect.
that means the car can here at the first point or the second point.
Now to find out where the car really is.
Is there third satellite.
And it happens again exactly the same, the car knows exactly how far away the satellite is removed from the car.
And here they are again many points where the range of the satellite.
But on the whole world but a point where these circles are taken, and precisely that point is where the car is located.
And this fourth satellite is for verification, that all calculations are correct.
By satellite 1, 2, 3 and 4, the computer knows where the car is now located.
And here at this navigation system, there is a message that you can recognize the four satellites.
And those are the figures, the computer calculates it.
Those are exactly the same coordinates as where I am.
Here on the bridge
And when I drive, so do the numbers.
As I drive on the bridge
And these figures, that change, also have a special name, geographical coordinates.
What is it now?
If you now take a good look at a globe you can see the black lines.
There are lines that run vertical and horizontal lines that run.
And where two lines to take you call a geographic coordinate.
It's like Battle, there is a letter and a row number row.
And if I would like to say I put a pin on B3 and everyone knows where I've put the ship.
And exactly describes a geographic coordinate, a point on the earth.
But now back to the navigation.
I have a tape and automat.
Now I paste straight stripes of tape on the machine.
So if this is true in the computer of the navigation on each street maps are also provided geographic coordinates.
The satellites transmit a signal, this signal is collected by computer, which calculates the geographic coordinates exactly.
Therefore, he always knows what street you are.
And as the car moves, the computer calculates.
And these calculations are exact number.
And as a navigation system helps us to find a place
In my case, the WDR on Appelhof Platz
But where's the entrance?
But you also have a bit of the eyes open!

Hoe werkt GPS ?

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