By Clement A. Ogaja
Utilized GPS for Engineers and venture Managers introduces civil engineers specifically people who are now not already authorized surveyors to the elemental rules of world positioning know-how (GPS). This publication covers GPS fundamentals, together with positioning and measuring rules, innovations to enhance accuracy, and an research of inexpensive as opposed to high-precision structures. next chapters clarify the concerns for choosing and imposing a GPS method after which show particular functions of GPS in numerous engineering events, together with tracking the healthiness of buildings, robotics and computing device keep watch over, maritime operations, fabric monitoring in huge development websites, web site regulate and layout, and tracking geohazards. This ebook might be important for all civil engineers attracted to making the most of using GPS applied sciences.
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Extra info for Applied GPS for Engineers and Project Managers
Source: NOAA. thick tree canopies, cars, ships, and bridges. Instead, these objects deflect them, causing the signals to arrive at the receiver via multiple paths (Fig. 2-17). The reflected signals will interfere with the signals that are received via a direct path. The reflected signal travels for a longer time instead of traveling a direct signal path. As a result, this causes the receiver position to be calculated incorrectly, with the position shifting in the direction of the multipath source.
Receiver Clock Bias Similar to the satellite clock bias, the receiver clock bias is an offset between the receiver clock time and true GPS time. Due to the fact that GPS receivers are usu- GPS POSITIONING AND MEASUREMENT PRINCIPLES Lost Signal (Diffradon) GPS antenna Signal,. - Figure 2-17. Multipath. ally equipped with relatively inexpensive clocks, the receiver clock bias is very large compared to the satellite clock bias. GPS time is based on highly accurate atomic clocks, while GPS receivers contain inexpensive clocks similar to those in common digital watches.
Figure 2-17. Multipath. ally equipped with relatively inexpensive clocks, the receiver clock bias is very large compared to the satellite clock bias. GPS time is based on highly accurate atomic clocks, while GPS receivers contain inexpensive clocks similar to those in common digital watches. 012345). The slight difference between the two, as a result of rounding off, is due to the poorer precision of the receiver clock. Despite being a small discrepancy, it often results in an error of up to 1 m.
Applied GPS for Engineers and Project Managers by Clement A. Ogaja