Testing of GPS accuracy for precision forestry applications

Zhang, Huichun, Zheng, Jiaqiang, Dorr, Gary, Zhou, Hongping and Ge, Yufeng (2014) Testing of GPS accuracy for precision forestry applications. Arabian Journal for Science and Engineering, 39 1: 237-245. doi:10.1007/s13369-013-0861-1


Author Zhang, Huichun
Zheng, Jiaqiang
Dorr, Gary
Zhou, Hongping
Ge, Yufeng
Title Testing of GPS accuracy for precision forestry applications
Journal name Arabian Journal for Science and Engineering   Check publisher's open access policy
ISSN 1319-8025
2191-4281
Publication date 2014-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1007/s13369-013-0861-1
Volume 39
Issue 1
Start page 237
End page 245
Total pages 9
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Abstract The use of existing geospatial technologies such as GIS and global positioning systems (GPS) to precision forestry is booming. The objective of this study was to examine the applicability of GPS and radio beacon differential global positioning system (RBN DGPS) for forestry machinery positioning. This would be an important step toward the realization of site-specific chemical application in China. A Trimble AG132 GPS receiver was mounted on a moveable platform and real-time differential GPS signals were obtained from the Yangtze River Beacon Station. The experiments were conducted on campus of Nanjing Forestry University, China. GPS data were collected and downloaded into a laptop computer via a RS-232 serial port and customer-developed data-acquisition software. Two tests were conducted: (1) a stationary test (where the mobile platform was maintained at a fixed location) in an open sky and forest condition to examine the precision (repeatability) of GPS signals, and (2) a mobile test (where the platform was moving) to examine the dynamic conformity degree. Analysis of variance was used to clarify the effects of positioning mode and stand area on the precision of GPS. In the stationary test, the variability of X and Y coordinates is smaller in RBN DGPS mode than that in the non-differential mode; and the performance of GPS in terms of position dilution of precision, horizontal dilution of precision, vertical dilution of precision, time dilution of precision values, effective positioning rate and the number of visible satellites was superior when used in RBN DGPS mode. In the mobile test, the desired traces of the moveable platform (circles) were much better followed by the GPS locations recorded in the RBN DGPS mode. Compared with non-differential mode, RBN DGPS is more suitable for precision forestry positioning requirements. RBN DGPS improves accuracy both in open sky and forest condition, and the service is available to end users in China with no additional costs.
Keyword Non-differential
Precision
Precision forestry
RBN DGPS
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Faculty of Science Publications
Official 2014 Collection
 
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