Theses and Dissertations


Chesser, Gary D., Jr.

Committee Member

Lowe, John Wesley

Committee Member

Byrd, John D.

Committee Member

Turnage, Lee Gray, Jr.

Date of Degree


Original embargo terms

Immediate Worldwide Access

Document Type

Graduate Thesis - Open Access


Agriculture (Engineering Technology)

Degree Name

Master of Science (M.S.)


College of Agriculture and Life Sciences


Engineering Technology Program


Global Positioning System (GPS) machine guidance aids in the precise navigation and piloting of farm machinery and serves to boost productivity and optimize farm operations. Characterization of low-cost GPS guidance systems for livestock production operations is necessary for return on investment (ROI) decision making. The objective of this research is to characterize the accuracy of four commercially available low-cost ($985 - $4,200) wide area augmentation system (WAAS) corrected GPS guidance systems. Testing procedures were designed in accordance with the ASABE/ISO standard 12188-2 for testing of satellite-based guidance systems during straight line travel. The vehicles lateral deviation of a planned path, characterized as cross-track error (XTE), was evaluated for short-term and long-term guidance for each system at speeds of 4.8, 9.6, and 14.5 kph (3, 6, and 9 mph).