摘要
在利用高精度磁测方法进行间接寻找砂金、岩金的研究中,需探测10nT左右的弱磁异常,这对日变改正精度提出了更高要求。针对这一需要,编制了软件,适用于IGS-2/MP-4与ENVIMAG两种型号的质子磁力仪,使其能同时投入工作做日变改正。采用一个完整的地磁平静日的日变观测数据,用分时区加权平均来确定日变改正基值。对每天测定的日变曲线先进行圆滑,降低仪器噪声对日变观测结果的影响后,再对当天各测点上的磁测值进行日变改正。这样既提高了日变改正精度,又实现了对两种型号磁力仪间观测数据的日变改正处理。
High-precision magnetic survey for gold-mine demands for the higher precision of diurnal variation. To meet the needs of increasing diurnal variation precision, a new software is developed. By the determination of the base station value for the diurnal variation with weighted mean and the diurnal correction with the magnetic diurnal variation curve after smoothing out the noise of the magnetometer , the precision of the diurnal correction is increasedand also the data processing between IGS-2/MP-4 and ENVI MAG magnetometers is simplified.
出处
《物探化探计算技术》
CAS
CSCD
2004年第3期211-214,共4页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家"九五"科技攻关计划(96-914-03)
关键词
精度
磁测
日变
日变改正
基点
high-precision magnetic survey
diurnal variation
diurnal correction
base station
