长引水式水电站工程GPS施工测量控制网数据处理  

Data Processing of GPS Control Network for Long-diversion-system Hydropower Project

作　　者：李祖锋[1,2] 张成增[1] 刘中华[1] 

机构地区：[1]中国水电顾问集团西北勘测设计研究院,陕西西安710065 [2]甘肃农业大学工学院,甘肃兰州730070

出　　处：《水力发电》2012年第1期19-21,共3页Water Power

摘　　要：在大跨度工程中,为了提高GPS控制网数据处理质量,通过平差确定准确的基线起算点坐标以提高基线解算精度,将中央子午线设在测区中央,根据测区实测边长,采用加权尺度比算法严密确定测区精密实测边长相对GPS反算边长的尺度比,利用尺度比与椭球参数的等价转换模型,确定相应工程参考椭球参数。For improving the data processing quality of GPS control network in the construction of large-span hydropower project, the exact baseline coordinate of starting point is determined through survey adjustment to improve the accuracy of baseline calculation. Based on the actual side length of surveyed area and setting the central meridian in the central part of surveyed area, the scale ratio of accurate side length in surveyed area to GPS inverse side length can be accurately determined by weighted scaling-ratio algorithm, and then the parameters of project reference ellipsoid will be determined by using the equal conversion model between scale ratio and ellipsoid parameters and determined scale ratio.

关 键 词：基线解算 尺度比 抵偿投影 工程参考椭球 全球定位系统 

分 类 号：P228.4[天文地球—大地测量学与测量工程] TV221.1[天文地球—测绘科学与技术]