Types of Global Positioning System Surveys

GPS surveying includes static, kinematic, and real-time kinematic methods, each tailored for specific applications.

Static GPS surveying involves placing one receiver at a known point and another at a point of interest to collect highly accurate data across kilometers. 

By repeatedly observing satellite ranges, it achieves centimeter-level relative accuracy, making it ideal for control surveys requiring extreme precision. 

Observation times range from 30 minutes to an hour, depending on receiver quality, atmospheric conditions, and satellite geometry. 

Kinematic GPS surveying collects position data while in motion, making it suitable for applications like tracking vehicles or conducting topographic mapping. 

It is commonly used for ship positioning during depth soundings or tracking aircraft during aerial surveys. 

When the moving receiver briefly pauses, it achieves accuracy comparable to static GPS but requires a continuous satellite lock, limiting its use in obstructed areas like forests or between tall buildings.

Real-time kinematic GPS uses a base station and rover system to provide real-time differential corrections, achieving centimeter-level accuracy. 

This method has revolutionized large-scale mapping and engineering layouts by instantly delivering precise data.