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随着美国SA政策的取消,GPS12C/GPS12XLC—美州豹(以下简称GPS)的单机定位精度从100m降至15m左右。由于GPS的PHASETRAC12TM向位跟踪,多星定位技术,其定位精度更高。但是,在森林调查时使用GPS定位,其精度的高低与森林的郁闭度大小、GPS启动方法和定位时间有关。文章将乌玛林业局森林调查GPS定位实验结果,以及运用数理统计的方法进行整理分析,确定科学合理的启动方法,定位时间及其定位精度,为今后准确合理使用GPS奠定了基础。
With the abolition of the SA policy in the United States, the positioning accuracy of GPS12C / GPS12XLC-US State Leopard (hereinafter referred to as GPS) is reduced from 100m to 15m. As GPS PHASETRAC12TM to bit tracking, multi-satellite positioning technology, its positioning accuracy is higher. However, the use of GPS positioning in forest surveys has been associated with the degree of forest canopy closure, GPS start-up methods and positioning time. The article will Uma Forestry Bureau of GPS survey results of the GPS survey, as well as the use of mathematical statistics to organize the analysis to determine the scientific and reasonable start-up method, positioning time and positioning accuracy for the future accurate and reasonable use of GPS laid the foundation.