Khảo sát một số kỹ thuật định vị trong việc nâng cao độ chính xác của thiết bị thu GPS giá rẻ
Abstract
In order to implement precise farming, it is crucial to obtain precise positions of agricultural machineries, unmanned aerial vehicles, etc. With the current under-developed Global Navigation Satellite System infrastructure, it is difficult to implement precise positioning due to the high cost of the precise positioning system. The aim of this research is to evaluate the precision of low-cost GPS recievers with different positioning techniques, especially Real-Time Kinematic GPS. Preliminary experimental results showed that an RTK-GPS system with self-built base station could achieve positioning precision of 0.2 m when the rover moved in a predefined route. It is promising that low-cost GPS receivers and antennas can be used to implement precise farming where positioning precision is acceptable within 0.2 m.
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Tài liệu tham khảo
Grisso, R. B., Alley, M. & Heatwole, C. 2009. Precision Farming Tools: Global Positioning System (GPS) [Online]. Available at: http://pubs.ext.vt.edu/442/442-503/442-503_pdf.pdf. Accessed 17 July 2014.
Jensen, K., Larsen, M., Simonsen, T. & Jørgensen, R. N. 2012. Evaluating the performance of a low-cost GPS in precision agriculture applications. First International Conference on Robotics and Associated High-Technologies and Equipment for Agriculture. Pisa, Italy.
Layton, A. W., Balmos, A. D., Sabpisal, S., Ault, A., Krogmeier, J. V., Buckmaster, D. 2014. ISOBlue: An Open Source Project to Bring Agricultural Machinery Data into the Cloud. In 2014 ASABE and CSBE/SCGAB Annual International Meeting.
Takasu, T. 2013a. RTKLIB: An open source program package for GNSS positioning. [Online]. Available at: http://www.rtklib.com. Accessed 17 July 2014.
Tasaku, T. 2013b. IPNTJ Summer School on GNSS, B-1 ~ B-5 - Introduction of RTKLIB Theory of Precise Positioning (1), (2). Available at http://www.gnss-pnt.org/summer_seminar/handouts/takasu1.pdf. Accessed 9 December 2014.
Takasu, T. & Yasuda, A. Evaluation of RTK-GPS performance with low-cost single-frequency GPS receivers. Proceedings of international symposium on GPS/GNSS, 2008. 852-861.
Takasu, T. & Yasuda, A. Development of the low-cost RTK-GPS receiver with an open source program package RTKLIB. International Symposium on GPS/GNSS, 2009. 4-6.
Witchayangkoon, B. 2000. Elements of GPS Precise Point Positioning. Maine: University of Maine.