The discussions of the simplified finite element modeling method of the satellite electronic equipments with closed box segment combination structure are given.

对于以封闭式盒段组合结构为特征的卫星电子设备，讨论了其有限元模型的简化建模方法。

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Such as the applications of the portable satellite receivers and the handling personal communication equipments limit strictly the size of filter.

例如在便携式卫星接收机和手持式个人通信设备中的应用都对滤波器的尺寸提出了严格的限制。

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Precision of GPS location is effected by many elements. Major error origins are error related with GPS satellite, error related with signal propagation and error related with accepting equipments.

GPS定位的精度受到诸多因素的影响，其主要误差来源包括与GPS卫星有关的误差、与信号传播有关的误差、与接受设备有关的误差。

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