Modern technology has brought lots of possibilities and innovations that aid our daily living to be better and convenient. One of these is the GPS or Global Positioning System. This is also called NavStar that was first built and used by the US military since 1995. This is used for improved navigation and coverage. But how does it work accurately to achieve excellent and accurate coverage? Let’s find it out!
GPS may use a lot of complex technology, yet it has a simple concept. A GPS receiver gets its signal from GPS satellites. These satellites will then transmit the signal at the exact time it was sent. We can identify the distance between a satellite and GPS by subtracting the time of transmission. The GPS receiver can also identify the exact position of satellites in the sky as the transmission has finished. Also, there are three dimensions of satellite position, which are the north, east, and altitude.
Below are some points on how and why a GPS works accurately.
- GPS satellites have their own two atomic clocks in which it carries onboard. These clocks are guaranteed synchronized with the help of the Master Control Station. Then, each signal from the GPS satellites carry lots of information such as:
- Precise orbit information or satellite ephemeris
- GPS time
- GPS Almanac: error correction, state of the constellation, and satellite identification
- GPS signals are then transmitted in two different frequencies. The first one is the LI C/A or also called a coarse acquisition carrier. This is widely used by civilian GPS receivers. On the other hand, the L2 P/Y or also called the precise carrier is used for allied military connections, especially the United States. Both of these frequencies have their own and transmit a pseudo-random noise or unique PRN code to each satellite. Another thing, this PRN code that comes from multiple satellites is used to determine positions and received by the GPS.
Using GPS provides a lot of benefits, aside from a faster and convenient connection. Mainly, its goal and purpose are to establish an effective means of acquiring and disseminating information to any part of the world. With this, any information can be spread out within a matter of seconds or minutes, depending on the distance between the sender and receiver. However, this is not all of that. GPS can also help in other ways, such as in navigation.
Vehicles nowadays can install a GPS tracker, which can be used in navigating a specific place to drive. This helps the driver to avoid getting lost when sending a passenger or when picking up. As a result, it helped in a faster way of getting and sending a passenger from one place to another. Another thing, GPS can also help in navigating lost people or products. For example, a child got lost while playing in the park.
Good thing, there is a GPS tracker that can be installed on a mobile phone to easily locate the child. In terms of a thing, the same method can be used. It can also help in the crime investigation sector. The authority can use GPS to locate a suspect and to capture it.
Above all of this, the reason why this works accurately and effectively is the excellent technology applied to it. Modern technology has brought lots of improvements and continuously works out to provide more developments to its processes and functions. In this way, our world can become better and much more convenient to live in.
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