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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/9226

Title: ASSEMBLING A REAL-TIME DGPS—TESTING AND INVESTIGATING FACTORS THAT AFFECT ITS ACCURACY
Authors: K. A. Al-Gaadi
Keywords: GPS accuracy, Field test, Position data, Precision farming
Issue Date: 5-Dec-2010
Abstract: A real-time differentially corrected global positioning system (RDGPS) was assembled and tested in the field. The RDGPS was assembled using two GPS receivers and two radios. One receiver was utilized as a base station receiver and its antenna was fixed at a benchmark, while the other was used as a mobile receiver (rover). RDGPS accuracy was tested by collecting position data from the rover and comparing it to a previously determined position of a point in the field. The effect of imprecise position determination of base station benchmark on the RDGPS accuracy was investigated. Moreover, the effect of the age of differential correction messages on position determination accuracy produced by the rover was revealed. The RDGPS maintained an average accuracy of less than one meter. The average position determination error produced by the rover was almost equal to and in the opposite direction of the error in base station benchmark coordinates. Seventy-two percent of the tested rover data maintained an accuracy of less than 3 m with a correction message age of less than 29 s. However, location determination error of the rover reached up to 30.84 m with a correction message age of 98 s.
URI: http://hdl.handle.net/123456789/9226
Appears in Collections:College of Foods And Agricultural Science

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