By a News Reporter-Staff News Editor at Journal of Technology -- New research on Sensor Research is the subject of a report. According to news reporting out of Valladolid, Spain, by VerticalNews editors, research stated, "Low-cost GPS receivers provide geodetic positioning information using the NMEA protocol, usually with eight digits for latitude and nine digits for longitude. When these geodetic coordinates are converted into Cartesian coordinates, the positions fit in a quantization grid of some decimeters in size, the dimensions of which vary depending on the point of the terrestrial surface."
Our news journalists obtained a quote from the research from the University of Valladolid, "The aim of this study is to reduce the quantization errors of some low-cost GPS receivers by using a Kalman filter. Kinematic tractor model equations were employed to particularize the filter, which was tuned by applying Monte Carlo techniques to eighteen straight trajectories, to select the covariance matrices that produced the lowest Root Mean Square Error in these trajectories. Filter performance was tested by using straight tractor paths, which were either simulated or real trajectories acquired by a GPS receiver. The results show that the filter can reduce the quantization error in distance by around 43%. Moreover, it reduces the standard deviation of the heading by 75%. Data suggest that the proposed filter can satisfactorily preprocess the low-cost GPS receiver data when used in an assistance guidance GPS system for tractors."
According to the news editors, the research concluded: "It could also be useful to smooth tractor GPS trajectories that are sharpened when the tractor moves over rough terrain."
For more information on this research see: A Kalman filter implementation for precision improvement in low-cost GPS positioning of tractors. Sensors, 2013;13(11):15307-23. (Elsevier - www.elsevier.com; Sensors - www.elsevier.com/wps/product/cws_home/504103)
Our news journalists report that additional information may be obtained by contacting J. Gomez-Gil, Dept. of Signal Theory, Communications and Telematics Engineering, University of Valladolid, 47011 Valladolid, Spain. Additional authors for this research include R. Ruiz-Gonzalez, S. Alonso-Garcia and F.J Gomez-Gil.
Keywords for this news article include: Spain, Europe, Valladolid, Sensor Research.
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