Realize point by point actual measurement in GPS operation blind zones by the use of total station instrument, measuring line and other routine surveying methods.

三是通过全站仪、测绳等常规测量方法来实现GPS作业盲区物理点的逐点实测。

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However, from the analysts point-of-view they might as well be forecasts since the actual measurement of those events in some cases has not even begun.

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