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GNSS???????????????α?????????????????????????????????α??????????????????????????????仯????????????????????????????????????÷????????????1??????????????????в????ε?????????????2????????????????????????3???????????????????????????????????????????GNSS?????????????÷????????????????????????????

EXPERIMENT FOR FILTERING HORIZONTAL MOVEMENT FIELD AND ITS STRAIN CALCULATION

GNSS data provides us with the necessary foundation for revealing crustal deformation, but it is difficult to utilize or acquire appropriately various crustal deformation information because of the existence of all kinds of noise. From the aspect of continuous variation, filtering and analyzing by use of the multi kernel function are proposed. This method some has characteristics as follows.1)The filtering and information separation at every different level can be realized.2)The analytic expression of the horizontal movement field can be obtained. 3) The various strain parameters of the continuous strain field can be conveniently computed. The example of filtering and strain compution with this method based on GNSS results in North China is given.