Titlebook: Environmental Geoinformatics; Monitoring and Manag Joseph L. Awange,John B. Kyalo Kiema Book 20131st edition Springer-Verlag Berlin Heidelb

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The Global Positioning SystemThe Global Positioning System or GPS is the oldest and most widely used GNSS system, and as such will be extensively discussed in this and the next chapter. The development of GPS satellites dates from the 1960s.