source:4G GPS Tracker release time:2024-04-13 Hits: Popular:realtime gps tracker online
????The advantages of GPS use
????1. Global positioning. The number of GPS satellites is large and evenly distributed, ensuring that at least four GPS satellites can be observed at any time anywhere on the Earth, ensuring the realization of global all-weather continuous navigation and positioning services (except for thunder and lightning should not be observed).
????2, high positioning accuracy. GPS relative positioning accuracy within 50km can reach 10-6m, 100-500km can reach 10-7m, 1000km can reach 10-9m. In 300-1500m engineering precision positioning, the plane position error of the solution is less than 1mm when observed for more than 1 hour. Compared with the side length measured by the ME-5000 electromagnetic wave rangefinder, the side length difference is up to 0.5mm, and the calibration error is 0.3mm.
????3. Short observation time. With the continuous improvement of the GPS system, relatively static positioning within 20km takes only 15-20 minutes; When the distance between each mobile station and the reference station is less than 15KM, the observation time of the mobile station is only 1-2 minutes. When real-time dynamic positioning mode is adopted, each station observation takes only a few seconds.
????4, no need to see between the stations. GPS survey only requires the station to be open, do not require the station to be visible to each other, so it is no longer necessary to build a tower.
????5, the instrument is easy to operate. With the continuous improvement of GPS receiver, the degree of automation of GPS measurement is getting higher and higher, and some have tended to be "silly".
????6, can provide global unified three-dimensional geocentric coordinates. GPS leveling can meet the accuracy of level 4, in addition, GPS positioning is calculated in the global unified WGS-84 coordinate system, so the measurement results of different locations around the world are interrelated.
????7. Strong adaptability. GPS is more adaptable and requires very little of the environment. Such as deserts, mountain tops, isolated islands and so on.
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