The New System of Kakioka Automatic Standard Magnetometer
Tsunomura, S., Yamazaki, A., Tokumoto, T. & Yamada, Y.
Abstract
The part of variation measurement of Kakioka Automatic Standard Magnetometer (KASMMER) was replaced as a four year program from 1989 to 1992. The new instrument is a set of a high sensitivity fluxgate magnetometer and four Overhauser magnetometers with three Fanselau・Braunbek Coils. The former is for getting high resolution one second values and the latter for stable base lines. After test observations for about one year, the sensors of optical pumping magnetometers which have been used these 20 years were replaced with those of Overhauser magnetometers and the routine observation by the new instrument was started at April. 1993. The computer system which had been two sets of stand-alone mini computers was also replaced with the new system composed oC seven UNIX work stations connected by ethernet cables. In this article, we introduce the design of the new system of KASMMER and report the brief observational results.
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