Repeat Station Data Reduction Using the CM4 Model

摘要

As an alternative to the commonly used method for the reduction of repeat station data, we have tested the relevance of the CM4 model for removing the external field. The dense network of observatories in Western Europe offers a good opportunity for this study. The prospect, however, is to elaborate a method which could be applied to the repeat station network of Madagascar, where only one observatory is available and the distance to the remotest repeat station is about 800 km.