Global Positioning Systems: Worksheet

C. Bourdarias, O. Robin, F. Rodriguez

1. Technical aspects

A Navigation System typically gives you _________, _________ and _________. For that, _____ satellites are necessary.

Clock mistakes can happen during a fast _________. To refine accuracy, you can use the _________ GPS, or _________ recievers.

What is the altitude of the 24 GPS satellites ? (tick the right answer):

2. Applications

With 2 points, you _________ (BONUS!) have a vector. If you give a point of _________, the reciever can calculate many things.
If you have a winding trip, you can place _________, or even upload _________ in the reciever.

Geodesic recievers are a lot more precise, but also very _________ (_________ euros).

3. Alternatives to Americal GPS and future

The US Department of Defense can typically decide to _________ completely the GPS at any moment, or to _________ precision.
GPS has some technical limitations and does not provide a service _________.

GLONASS was created by the _________ Army. There are only 5 or 6 working satellites remaining, because they do not have enough _________ to maintain them.

Galileo has no military purposes. It only has _________ purposes. It is developped by the UE in close cooperation with the _________ _________ _________. Galileo includes an _________ message, so that you can detect errors.

GLONASS stands for (tick the right answer):