水平分量磁变仪基线值漂移的初探

Tentative quest for the drift of base-line values of horizontal-component variometers

对水平分量磁变仪基线值负漂移现象作了探讨，认为地磁场水平强度的变化和水晶丝扭力系数的减小是影响水平分量磁变仪θ角改变的主要原因，也是影响定向改变的主要原因。另外，还对减小Ｈ仪基线负漂移的可能途径进行了讨论。

The drop-drift phenomenon of base-line values of horizontal-component variometerswas a puzzling problem. This problem has been discussed in the paper. The cause ofdropdrift is regarded as the reduction of potential energy of twist of quartz-fibre. Princi-pal causes of θ-angular variations are considered as variations of horizontal magnetic in-tensity H and potential energy constant of twist.The measurements which may decreasedrop-drift of baseline values of horizontal-componcnt variometers are also discussed inthis paper.