| 华北地区区域水准大气折光影响分析 |
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| 引用本文： | 畅柳,许明元,吕传振,苏广利,王家庆,田晓.华北地区区域水准大气折光影响分析[J].测绘科学,2017,42(10). |
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| 作者姓名： | 畅柳 许明元 吕传振 苏广利 王家庆 田晓 |
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| 作者单位： | 中国地震局第一监测中心,天津,300180 |
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| 基金项目： | 国家科技基础性工作专项，中国地震局第一监测中心科技创新主任基金项目 |
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| 摘 要： | 大气折光对水准测量的影响是目前最重要且很难消除的误差之一。由折光影响产生的系统闭合差可能超过随机观测误差,那么在沿相同水准路线作重复观测的情况下,就可能会出现同符号闭合差。针对这一问题,该文提出了分析闭合环统计性质,从而提取出大气折光可能影响大的测段的方法。为了定量分析大气折光对水准观测结果的影响,提出不测温差的大气折光改正方法,对提取出的测段进行折光影响模拟。结果表明,大气折光对部分测环的水准环闭合差有系统性偏离影响,部分测段大气折光影响与地形存在明显的相关性。
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| 关 键 词： | 华北地区 大气折光 环闭合差 |
Analysis of refraction influence on atmosphere in North China |
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| CHANG Liu,XU Mingyuan,LV Chuanzhen,SU Guangli,WANG Jiaqing,TIAN Xiao.Analysis of refraction influence on atmosphere in North China[J].Science of Surveying and Mapping,2017,42(10). |
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| Authors: | CHANG Liu XU Mingyuan LV Chuanzhen SU Guangli WANG Jiaqing TIAN Xiao |
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| Abstract: | Atmospheric refraction is one of the main errors in leveling which is hard to eliminate.System closure error produced by the refraction may exceed the random observation error,so in case of repeated observations along the same level route,it is possible to have the same symbol closure.A method of analyzing the statistical properties of the closed loops was proposed in this paper so as to extract the leveling lines which may affected by atmospheric refraction.In order to quantitatively analyze the influence of refraction,formula without measuring the temperature to calculate atmosphere refraction was proposed to simulate the refraction of the extracted leveling lines,and there was a significant correlation between the atmospheric refraction and the terrain. |
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| Keywords: | North China atmosphere refraction level loop closure |
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