摘要
针对北斗卫星导航定位系统测量高度误差过大的不足,以北斗卫星定位系统为基础,研究从平面定位数据到高度数据的转换方法,并提出从水位测量趋势曲线向实际曲线映射的变换算法。在高度转换中,引入三角形观测模型,把由卫星定位得到地面两点的经纬度所获得的水平距离转化为高度;在映射变换算法中,用高度差反映河流水位涨落的大小,得到河流水位变化趋势的最小二乘法拟合曲线,应用数据映射的变换方法得到能够描述实际水位变化相吻合的曲线。这种测量技术经过实验测试,结果表明:河流水位变化的测量误差在±0.8 m以内,可以实现对于河流水势涨落的全天候监测。
In order to overcome the shortcomings of BDS(Beidou satellite navigation system) in the height measurement,a method of transforming from plane positioning data to height was studied based on the Beidou satellite positioning,and also a transformation algorithm,which was from the water level measurement trend curve to the actual curve mapping is else proposed in this paper.In the height transformation,the triangular observation model was introduced to convert the horizontal distance obtained from the latitude and longitude of the two points on the ground to the height.In the mapping transformation algorithm,the river water level difference of was reflected by the height difference to obtain the least squares fitting curve of the river water level change trend.And then using the data mapping transformation method,a new curve consistent with the actual changes water level was gotten.The measurement results showed that the measurement error of river water level change was within ± 0.8 m,which can realize the all-weather monitoring of river water level fluctuation.
出处
《延安大学学报（自然科学版）》
2017年第4期76-80,共5页
Journal of Yan'an University：Natural Science Edition
基金
国家自然科学基金项目(61661049)
陕西省教育厅科技计划项目(16JK1851)
陕西省大学生创新训练项目(1564)
关键词
水位监测
北斗定位
拟合曲线
映射变换
误差
water level monitoring
BDS positioning
fitting curve
mapping transformation
error
