摘要
利用潮汐分析的方法,分析和评价了新疆数字化形变观测资料的精度和稳定性。结果表明,主波M2波、O1波的潮汐因子的纬度分布与理论值有较好的一致性,中误差小;各台仪器的观测精度达到并超过了中国地震局形变Ⅰ类台的标准;地倾斜类观测仪器精度高,稳定性好,尤其是水管倾斜仪的各项指标普遍高于其他类仪器,mγ<0.005;硐体应变仪的δα/α<0.03,体应变仪的δα/α<0.01,超过δα/α<0.05的指标。研究还发现,个别台站仪器定向和方位角存在较大偏差。
The tide analysis method was used to analyze and assess the accuracy and stability of dig- ital deformation observation in Xinjiang. The results showed there was better consistency between the latitude distributions of main wave tidal factor and theoretical value, and the quadratic mean deviation was very small. The observation accuracy of all observation instruments met or surpassed the standard of class 1 deformation stations of China Earthquake Administration. The observation instru- ments of ground tilt have higher accuracy and better stability; especially all the indices of water tube inclinometer are higher than other type of instruments. The study indicated there was obvious deviation in the determination of direction and azimuth in several stations.
出处
《内陆地震》
2009年第2期107-115,共9页
Inland Earthquake
基金
国家"十五"重大项目"中国数字地震观测网络"项目前兆分项资助
关键词
数字化形变观测
潮汐参数
精度
稳定性
Digital deformation observation
Tidal parameters
Accuracy
Stability
