GPS to be Globe Positioning System. GPS is used everywhere. You can see GPS in your car, mobile phones, and smartwatches. GPS is a beneficial feature and helps you go from one location to another. What is GPS? what is the meaning of GPS? A complete Guide, if you want to know more about GPS and its features, history you can read the article.
What is GPS? And Working on GPS.
What is GPS used for? The GPS is also called the Global Positioning System that receives the data from the Satellite and provides us the location, velocity, and time for traveling on land, sea, and air.
The satellite system consists of 24 satellites in the Earth Orbits, each orbit with 4 satellites, moving13000 miles at a speed of 8700 km above the Earth.
We only need three satellites to provide the location, but the fourth one is there to give the information from the other satellites. The fourth Satellite also provides the altitude.
Three Elements of GPS
GPS is made of three different parts, also called the segments that work together to give the exact location information.
The segments of GPS are:
- Space (Satellites) – The Satellites move around the Earth, providing the signals to users on a geographical map and time of the day.
- Ground Control or Ground Segment – The Ground Control Segment consists of Earth monitor stations, master stations and the ground antenna. Control activities like tracking and operating the Satellite from the Earth and monitoring transmission. There are monitoring devices almost in every continent of the world, like Asia and Australia.
- User Devices – It receives the data from the Satellite and provides the data on the user devices like smartwatches, smartphones, and other devices.
How Does the Technology of GPS work?
It works with a technique called trilateration. This technique engaged in calculating location, and elevation. It collects signals from the Satellite to provide location information. Another technique that is used is known as triangulation which is used to measure only angles, not the distances.
Working of GPS
Satellites moving around the Earth send the signals to be read by the GPS device, situated on Earth’s surface or near the Earth’s surface. To calculate the location provided by the Satellite, a GPS device is used to read the signals of at least four satellites.
Each Satellite in orbit moves around the Earth twice a day, and each Satellite sends its own unique signal. At any moment, a device can read the signals from six satellites.
The satellite that revolves within orbit moves around Earth sends a signal picked next to any GPS device. The GPS device engaged sending distance from the device to the satellite. It only shows information about distance, velocity, and time from a satellite. And cannot provide information about the angles the location of GPS device could be anywhere in the world.
Satellite creates circle accompanied by radius, and signal sent to GPS device. When Satellite sends a signal to the GPS device, the location is narrowed Where the circle intersects. The signal of the third Satellite confirms the device’s location as the device is at this location with the signals of all three satellites.
You heard from many people that we are living in a 3-dimensional world, Which means that the satellite is used to make a sphere, not a circle. The interaction between these three squares produces two new points of interaction. With the moving of the Satellite, the radius of the Satellite keeps changing, and with the changing radius, new spheres are being produced. We use this data combined with date and velocity to calculate the distance for our destination.
Uses of the GPS are?
It is a potent and handy tool used by many organizations and industries. For example, pilots, scientists, boat captain workers in mining and agricultural businesses use daily. Its information is also used in preparing surveys, maps, taking good time computation, navigation. GPS works in all places at all times and in any weather conditions.
Five significant GPS uses are:
- Location – GPS used for determining a perfect location or position on the map.
- Navigation – GPS also used for navigation purposes like going from one location to another.
- Tracking – Tracking helps us on monitoring any object or personal movement on the map.
- Mapping – GPS used for creating maps of the world.
- Timing – It makes it possible to take exact time measurements.
Some examples of GPS use.
- Emergency Response – During the time of emergency or at the time of natural disasters. It is engaged for mapping and predicting weather conditions, telematics is busy in the middle of sending data for emergency services, for example, vehicle crashes, it reduces response time.
- Entertainment – It is also used for entertainment purposes, for playing games as Pokemon go and geocaching.
- Health and Fitness – It is also used in Smartwatches and fitness trackers can track health and fitness.
- Construction, mining and off-road trucking – GPS and also used for constructing any building or taking exact time and measurements.
- Transportation – GPS device used in many industries like agriculture, autonomous vehicles, military, mobile communication industry, security, and fishing. Telematics used to help the driver, safety, route Optimisation, fuel efficiency, and compliance.
Accuracy of GPS
Its accuracy depends on many things such as the number of satellites, weather conditions, the urban area, and more.
Factors causing low GPS accuracy.
Physical Obstructions: Its accuracy can be low because of the large masses like mountains, buildings, trees, and more cutting the signal from the Satellite to the GPS.
Atmospheric Effect: Atmospheric effects can also have low GPS accuracies like heavy storms, solar storms, heavy rain, or other bad weather condition.
Numerical miscalculations: There might some numerical calculations that device hardware is not designed to these specifications.
Artificial interference: This error includes GPS jamming devices.
GPS accuracy is supposed to be higher in the areas where there are no tall buildings or any blocked signals this is called urban Dinon when any device is surrounded by large buildings for trees, for example, the device is in Downtown or Toronto in this situation the satellite signal is first blocked and then bounce from any building where it is finally read by the device this can also result in miscalculations.
What is the history of GPS?
Humans have been using Navigation for thousands of years with the help of the Sun moon stars. GPS was an invention of the 20th century that is possible with the help of the space age Technology.
In the year 1983, the Government of US-made GPS publicly available. But they were keeping control of all the available data. By the end of the 20th century, the companies and the general public had not gained full access to use GPS commonly.
What do you mean by global navigation satellite system (GNSS)?
Global Navigation satellite means that a satellite must be with full Global coverage it is also considered to a fully Navigation satellite system. As with the end of 2020, we have two fully operational Global Navigation satellite systems. First, the US satellite. Navigation signal timing and ranging are known as NAVSTAR, and second Russia’sRussia’s Global Navigation satellite system is known as GLONASS. The NAVSTAR Satellite consists of 32 satellites by the US, and it is known as the best and most widely utilized satellite system. The GLONASS consist of 24 satellites.
Other countries are also in the race to get a fully Global Navigation satellite system, for example. The EU Is also working on a fully Global Navigation satellite system. China is also building a fully powered Global Navigation satellite system with available 35 satellites. Japan and India are also in the race to build an entirely Navigation satellite system. India is building a regional Navigation satellite system (IRNSS).
GNSS Devices vs. GPS Devices
GPS receiver knew subset device of GNSS receivers. This server is capable of only reading information from satellites that are in the GPS satellite network. At the same time, the other GNSS receiver can get information from GPS and GLONASS.
GNSS server has 60 satellites. At the same time, any other device needs only three satellites to determine the location and velocity. For the most significant number of satellites, accuracy going to be improved. GNSS devices can see more satellites than devices, which helps in improving device accuracy.
A more significant number of satellites giving information to the GPS receiver enables the receiver to calculate the location with greater accuracy. More satellites give a better and higher chance of fixing when the receiver has calculated the location.
Drawbacks of GNSS receiver.
The GNSS service is more expensive than the GPS service. GNSS receiver uses high bandwidth than the GPS receiver. This means that you cannot use GPS radio frequency components like antenna filters, amplifiers. These components are not going to work for GNSS receivers. It may result in a Greater cost. The power consumption of the GNSS receiver is higher than the GPS receivers because it connects two or more satellites than the receivers and runs calculations to provide location.
Future of GPS
Countries are trying to make improvements in their GPS systems. Efforts are taken worldwide to increase the accuracy of systems and improve reliability and capability.
GNSS receivers are becoming smaller, more accurate, and very efficient. GNSS technology is going to become cheaper, like GPS technology.
Scientists and other workers are working on new technology to use in the control of natural disasters and analyze the early events like an earthquake, volcanic eruption, or Avalanche. In the period of covid-19, the scientists will use cell phone location data to slow down the spread of the virus. And with the launch of new and better satellites will also improve the accuracy, and improve navigation abilities.
The next-gen satellite comes up with better signal protection, decreased signal jamming, and more ability to cover all other dead zones.
NASA will use a powerful satellite to provide better efficiency in time for astronauts going on deep space Journeys.
The future version of GPS is likely to be better, accurate, and effective for personal and business use.