Alrashid Cyber Mall, is Designed and hosted by Nova Stars Informations Services, Memeber of The Saudi Network, Trade and business informations and links to Saudi Arabia, Arabian gulf and middle east area.

Quran, Arabic and English
Nova Stars Elecronics

 
Saudi Arabia, Trade and business informations and links to Saudi Arabia, Arabian gulf and middle east area.
Member of
The Saudi Network, Trade and business informations and links to Saudi Arabia, Arabian gulf and middle east area.
Saudi Arabia Trade and Business Directory
Nova Stars Information Services, Trade and business informations and links to Saudi arabia, arabian gulf and middle east area.
Special Communication Systems
Home Table of Content Search Company Profile Nova Blogs

How GPS Works, Step 3: Getting perfect timing

How GPS Works, Step 3: Getting perfect timing

 

 

All About GPS
timingB.gif (15860 bytes)

If you don't have time here's a quick summary:

Extra Measurement Cures Timing Offset

If our receiver's clocks were perfect, then all our satellite ranges would intersect at a single point (which is our position). But with imperfect clocks, a fourth measurement, done as a cross-check, will NOT intersect with the first three.

So the receiver's computer says "Uh-oh! there is a discrepancy in my measurements. I must not be perfectly synced with universal time."

Since any offset from universal time will affect all of our measurements, the receiver looks for a single correction factor that it can subtract from all its timing measurements that would cause them all to intersect at a single point.

That correction brings the receiver's clock back into sync with universal time, and bingo! - you've got atomic accuracy time right in the palm of your hand.

Once it has that correction it applies to all the rest of its measurements and now we've got precise positioning.

One consequence of this principle is that any decent GPS receiver will need to have at least four channels so that it can make the four measurements simultaneously.

With the pseudo-random code as a rock solid timing sync pulse, and this extra measurement trick to get us perfectly synced to universal time, we have got everything we need to measure our distance to a satellite in space.

But for the triangulation to work we not only need to know distance, we also need to know exactly where the satellites are.

In the next section we'll see how we accomplish that.

Continue

 

 

 

Car rentals in over 6000 locations worldwide

 

 

 

Home Up

Best Hotel Reservation

In Saudi Arabia & World Wide

Saudi Arabia
 Alrashid Cyber Mall, member of The Saudi Network, Trade and business informations and links to Saudi arabia, arabian gulf and middle east area.
Shopping in Saudi Arabia

Send E-mail to TSN@The-Saudi.Net with questions or comments about The Saudi Network.
1001 Arabian Network, Alrashid Cyber Mall and The Saudi Network are members of Nova* Stars* Information Services
The Saudi Network, Trade and business information and links to
Saudi Arabia, Arabian Gulf and Middle East Area.

morocco, libya, lebanon, kuwait, jordan, iraq, egypt, bahrain, algeria, yemen, uae, tunisia, syria, sudan, qatar, palestine, oman

We are Looking for Business Sponsorship or Marketing Partnership