摘要
以观测条件及观测质量居全国前列的山东泰安台为例 ,对固体潮形变观测的数字化与模拟资料的一致性、精度等方面进行了对比研究 ,认为固体潮的数字化与模拟观测资料的形态、观测精度、方差及均值无显著差异。通过对潮汐因子中误差、相位滞后及仪器零漂等参量的计算 ,对山东、上海及江苏各套形变数字化仪器观测资料的连续性、稳定性及观测质量进行了综合分析。在数字化倾斜仪中 ,水管倾斜仪的稳定性及精度较高 ,石英摆存在一定程度的漂移 ,垂直摆倾斜仪的漂移较大且资料精度较低。伸缩仪也存在精度较低的情况 ,但数字化资料精度略高于模拟资料 ;压容及体应变仪资料精度较高 ,但压容仪漂移较大 ,仪器稳定性不及体应变仪 ;体应变仪受气压、水位影响较显著。山东各形变台观测资料总体质量较好 ,上海佘山、江苏常熟台次之 ,江苏徐州台较其它台受降雨干扰大、漂移大 ,资料的稳定性及精度较低 ,说明台址条件是决定观测质量的重要因素之一。
Taking the Tai'an seismic deformation station as an example, whose observational condition and quality are the best in China, the coherence, the accuracy and the calibration of the digital data are compared with those of the simulated observations. The results show that the earth tide shape, the accuracy, the error and the mean value of digitized data are consistent with those of the simulated data.By calculating and analyzing the error of tide factor γ, phase lag and the drift of the instruments the continuity, the stability and the observational quality of each meter in Shandong, Shanghai and so forth are evaluated synthetically. Among the digitized instruments, the stability and the accuracy of the water tilt meter are higher than those of others. The drift of the quartz pendulum tiltmeter is more larger than that of water tilt meter. The drift of the vertical pendulum tilt meter is the most,so its accuracy is the lowest. The accuracy of the extensometer is lower. The accuracy of the capacitance strain meter and the body strain meter are high,but its drift is more than that of body strain meter,this means that its stability is inferior to the body strain meter. The atmosphere and the water level may affect the observational results of body strain remarkably.
出处
《大地测量与地球动力学》
CSCD
2003年第4期60-64,共5页
Journal of Geodesy and Geodynamics
基金
国家十五科技攻关项目 ( 2 0 0 1BA60 1B0 1-0 4-0 2 )
