地震水准测量成果中几项改正的讨论  

DISCUSSION OF SEVERAL CORRECTIONS LEVELING RESULTS FOR SEISMIC STUDY

作　　者：薄万举[1] 陈聚忠[1] 

机构地区：[1]中国地震局第一监测中心,天津300180

出　　处：《大地测量与地球动力学》2011年第3期34-37,41,共5页Journal of Geodesy and Geodynamics

摘　　要：依据国家一、二等水准测量规范(GB/T 12987-2006),分别给出了水准测量中标尺温度改正、正常水准面不平行改正、重力异常改正、固体潮改正和海潮负荷影响等改正的计算公式和方法,并对地震形变分析计算中进行各项改正的必要性进行了讨论。强调:在形变分析计算中,是否进行某一项改正,新老成果必须保持一致;老成果没有进行改正,新成果中没有必要也不应该进行改正,否则可能造成更大的不合理;出于科学研究和测量数据多样化用途的考虑,认为在地震水准测量中各项改正所需要的辅助观测量应该完整地保存下来。According to the state specifications for the first and second order leveling（GB/T 12987-2006）,the methods and formulae for several corrections including correction of leveling staff for temperature,correction for normal nonparallel levels,correction for abnormal gravity,correction to solid tide and the load of sea tide,are given,and the necessity of those corrections for analysis and calculation of crustal deformation in seismic study are discussed.The results of this work emphasize that doing corrections or not must be the same for the new leveling data and old one in crust deformation analysis and calculation.If the old leveling data are not corrected,it is not necessary to correct the new ones.Otherwise,more unreasonable results may appear.For scientific research and multiple usage of leveling data,it is suggested that all the accessorial observation data in every leveling correction should be preserved completely in seismically leveling.

关 键 词：水准测量 温度改正 固体潮 重力异常 海潮负荷 

分 类 号：P315.72[天文地球—地震学]