How GPS works?

Introduction

Global positioning system (GPS) is a space-based navigation system owned by the US government and operated by the US Air Force. It is a global navigation satellite system which  provides relocation and time information to GPS receivers on Earth or anywhere in the world because it has the capacity to transmit signals over long distances.

 

GPS technology

 

The Global Positioning System does not require users to transmit data, and operates independently of the network. These technologies can increase the usefulness of your global location information. It can provides important positioning capabilities for military, commercial and commercial users around the world.

Detecting satellites

The GPS concept is mainly based on the known location of time and the special satellite. The satellites carry very accurate atomic clocks that are synchronized with each other and with the ground clock. The exact time changes that are kept on the ground are corrected daily. In the same way, satellite positions are known very accurately. The satellite positioning system receiver also has a clock, but is not synchronized in real time and less stable, and satellite positioning satellites continuously transmit their current time and position.

 

GPS satelite

 

Mostly all receivers have a track algorithm, sometimes referred to as a combinatoric of a set of satellite measurements collected at different times, taking advantage of the fact that consecutive receiver locations are close to each other. After a number of measurements have been made, the tracker predicts the receiver position corresponding to the next set of satellite measurements. When new measures are considered, the recipient uses a weighting scheme to join new measurements with the prediction of follow-up. In general, a tracker can:

  • Improve receiver position and time
  • Rejecting inappropriate measures
  • Estimation of receiver speed and direction

Advantages

  • GPS technology provides tracking information and helps predict natural disasters.
  • Some law enforcement agencies have used GPS devices to monitor vehicles and persons suspected of criminal activity.
  • Devices that use GPS receive real-time updates that allow them to monitor traffic and redirect them to a faster, more efficient route.
  • GPS has slowly replaced traditional land surveying techniques with the federal highway administration for more accurate surveying.

Disadvantages

  • Although GPS receivers have become very accurate over the last two years, they still need a line of sight to lock the satellites.
  • There is always an attempt to enter data while driving and dividing the attention between the road and the SPF is a disaster recipe.
  • Most GPS receivers display a start-up screen that warns against key operation while driving.

Applications

  • Navigation: GPS allows us to navigate on water, air or land. It allows aircraft to land in the mountains and medically helps helicopters save valuable time by taking the best and shortest route.
  • Schedule: Each satellite is equipped with an extremely precise atomic clock. That’s why we can call the synchronization of our watches.
  • Tracking: This has been used with wireless communications to track criminals. The suspect agrees to keep the GPS receiver and the transmission device with him all the time.

Leave a Reply

Your email address will not be published. Required fields are marked *