How Does GPS Account for Asymmetric Geometry on Earth's Surface?

In summary, the Global Positioning System calculates a height above the Earth's barycentre and converts it to a height based on a chosen spheroid model and map grid. This is necessary to account for the irregular surface of the Earth and allows for more accurate results with the use of Differential GPS.
  • #1
Loren Booda
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4
How does the Global Positioning System compensate for mapping the irregular surface of the Earth relative to its center of mass?
 
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  • #2
If I understand what you are asking, it doesn't - it gives a lat, long, and altitude above msl (so the model of Earth it has is smooth and based on msl). If the surface of the Earth happens to be at that altitude, great. If not...hope you have wings...
 
  • #3
Inherently it calculates a height above the Earth barycentre, essentially a distance below it's orbit.
It then converts that to a height based on whichever spheroid model you selected (for GPS=WGS84), then if you have selected a particular map grid (eg OSGB) it converts the height into the mean sea level for the default for that coordinate system.
This is all necessary to deal with bumps - the coast of the Britain is several metres below sea level according to WGS84.
 
  • #4
In order to get better results you can use Differential GPS (DGPS).
 

FAQ: How Does GPS Account for Asymmetric Geometry on Earth's Surface?

What is GPS in asymmetric geometry?

GPS in asymmetric geometry is a method of using the Global Positioning System (GPS) to determine the position of an object in situations where the geometry of the GPS satellites is uneven or irregular.

Why is GPS in asymmetric geometry important?

GPS in asymmetric geometry is important because it allows for more accurate positioning in situations where traditional GPS methods may not work as well. This can be particularly useful in urban environments with tall buildings or in mountainous regions with uneven terrain.

How does GPS in asymmetric geometry work?

GPS in asymmetric geometry uses mathematical algorithms to calculate the position of an object based on the time delay of signals from multiple GPS satellites. These algorithms take into account the varying geometry of the satellites in order to provide a more accurate position.

What are the limitations of GPS in asymmetric geometry?

GPS in asymmetric geometry may not work well in areas with limited satellite coverage or in situations where there are obstructions such as tall buildings or dense vegetation. It also requires a high level of technical expertise and sophisticated equipment.

What are the potential applications of GPS in asymmetric geometry?

GPS in asymmetric geometry has many potential applications, including navigation and mapping in urban environments, precision agriculture, and disaster response and recovery. It can also be used in combination with other technologies, such as drones, for more accurate positioning and tracking.

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