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Comparison of positional accuracy between rtk and rtx gnss based on the autonomous agricultural vehicles under field conditions

AutorCarballido, J.; Pérez Ruiz, M.; Emmi, Luis Alfredo ; Agüera, J.
Palabras claveGNSS
Precision agriculture
Autonomous tractor
Agricultural machinery
Fecha de publicación2014
EditorAmerican Society of Agricultural Engineers
CitaciónApplied Engineering in Agriculture 30: 361- 366 (2014)
ResumenCurrently, many systems (machine vision, high resolution remote sensing, global positioning systems, and odometry techniques) have been integrated into agricultural equipment to increase the efficiency, productivity, and safety of the individual in all field activities. This study focused upon assessing a satellite-based localization solution used in straight path guidance of an autonomous vehicle developed for agricultural applications. The autonomous agricultural vehicle was designed and constructed under RHEA (Robot fleets for highly effective agriculture and forestry management) project and is part of a three-unit fleet of similar vehicles. Static tests showed that 99% of all positions are placed within a circle with a 2.9 cm radius centered at the geo-position using real-time satellite corrections (RTX). Dynamic tests between rows demonstrated a mean (N=610) of the standard deviation for real-time base station corrections (RTK) of 1.43 cm and for real-time satellite corrections (RTX) of 2.55 cm. These results demonstrate that the tractor was able to track each straight line with high degree of accuracy. The integration of a Global Navigation Satellite System (GNSS) with sensors (e.g., inertial sensor, altimeters, odometers, etc.) within the vehicle showed the potential of autonomous tractors for expanding agricultural applications utilizing this technology. © 2014 American Society of Agricultural and Biological Engineers.
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