集思宝G330手持全球定位系统接收机在林区单点定位的精度分析  

Analysis of single-point positioning precision in forestry using a G330 handheld GPS receiver

作　　者：冯晓娜[1] 徐文兵[1] 汤孟平[1] 吴广正[1] 

机构地区：[1]浙江农林大学环境与资源学院,浙江临安311300

出　　处：《浙江农林大学学报》2013年第5期640-647,共8页Journal of Zhejiang A&F University

基　　金：国家自然科学基金资助项目(31170595);浙江省科学技术面上项目(2009C32063);浙江省教育厅一般项目(Y201119550);浙江省森林生态系统碳循环与固碳减排重点实验室开放基金资助项目(KFJJ2012004);浙江省高等学校优秀青年教师资助计划项目(浙教办高科[2010]175号);浙江农林大学大学生科技创新项目(100310)

摘　　要：在林区环境中,以GPS-RTK测量数据为参考值,利用集思宝G330手持全球定位系统(GPS)接收机对多个试验点进行多历元单点定位,获得试验点BJ54坐标三维坐标(x,y,H)并进行分析和评价。研究表明:集思宝G330手持GPS接收机在林区单点定位时,90.0%的平面坐标内符合精度小于4.0 m,85.0%高程精度小于6.0 m;85.0%～90.0%的平面坐标外符合精度小于5.0 m,87.2%的高程精度小于10.0 m;未设置坐标系统转换参数的手持式GPS接收机单点定位,消除系统性偏差后的观测值精度有显著提高;利用测区内已知点和2台以上的手持GPS接收机同步观测,可有效改善单点定位精度。In a forested area of Mount Tianmu,the precision of single point positioning with a G330 handheld GPS receiver compared to an observed value by GPS-RTK （Real Time Kinematic） was analyzed and evaluated.Results showed that （1） for BJ54 planimetric coordinates,inner precision with 90.0％ of the test points was less than 4.0 m,but for the vertical coordinates,precision was about 85.0％ in less than 6 m.（2）Also,for BJ54 planimetric coordinates,the outside precision with 85.0％-90.0％ of the points was less than 5.0 m,but for the vertical coordinates,precision of was about 87.2％ in less than 10.0 m.（3）For a handheld GPS receiver with no coordinate conversion parameters,when systematic deviation was eliminated,the observation accuracy of single point positioning improved.（4）Additionally,single point positioning precision could be improved through simultaneous observation using two or more handheld GPS receivers.

关 键 词：森林测计学 手持GPS 单点定位 系统性偏差 内符合精度 外符合精度 同步观测 

分 类 号：S758[农业科学—森林经理学]