Applied GPS for Engineers and Project Managers by Clement A. Ogaja

By Clement A. Ogaja

Utilized GPS for Engineers and undertaking Managers introduces civil engineers in particular people who are no longer already approved surveyors to the basic ideas of world positioning expertise (GPS). This publication covers GPS fundamentals, together with positioning and measuring ideas, recommendations to enhance accuracy, and an research of reasonably cheap as opposed to high-precision platforms. next chapters clarify the issues for choosing and enforcing a GPS procedure after which show particular functions of GPS in quite a few engineering events, together with tracking the overall healthiness of buildings, robotics and computer keep an eye on, maritime operations, fabric monitoring in huge development websites, web site keep watch over and layout, and tracking geohazards. This e-book could be invaluable for all civil engineers drawn to making the most of using GPS applied sciences.

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For height measurements, it plays the role of level equipment but its measurements are based on the ellipsoid rather than the geoid, as with a traditional level. Carrier Phase Techniques Table 3-2 provides an overview of the carrier phase techniques that are in use today. It is important to note the following definitions when using the table: Postpocessing: measurements are taken in the field and processed later in the office. Real time: measurements are taken and processed in the field and coordinate results are available or visible at the time of the measurements.

Relative positioning can further be divided into two classes depending on the measurements used, namely, pseudorange-based differential positioning (code phase DGPS) and carrier phase-based differential positioning (carrier phase DGPS). In code phase DGPS, the estimation of the range error for each satellite is carried out at the reference station. The estimated range errors (or corrections to the measurements) are broadcast to the users by an appropriate communication link (Parkinson and Enge 1996).

With the launch of the first Block IIR-M satellite (September 21, 2005) came the new and different signals that would augment existing codes. As mentioned in Chapter 1, one of the significant improvements was the increased L-band power on L1 and L2, and the broadcast of new signals such as L2C and the M-code (the M stands for Modernized). The M-code The M-code is a new military code. It is carried on both L1 and L2, and will probably replace the P(Y) code eventually. S. Department of Defense to increase the power of the code to prevent jamming.

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