Abstract

The data downloading software supplied by a GPS receiver manufacturer is generally sufficient for manual acquisition of data directly from the receiver. The vendor software is often designed with a graphical user interface, incorporates other receiver programming features, and is meant to be interactive. Vendor software does not perform as well for large-scale automated downloads of GPS receivers in the field and seldom supports alternative operating systems, such as Linux. After researching the various software packages available, the Southern California Integrated GPS Network (SCIGN) determined that existing software packages were not sufficient to operate the 250 permanent GPS stations in Southern California. Also, experience using Microsoft Windows for automated data acquisition convinced us to use alternative operating systems. The data acquisition development was divided into two separate programs: – Sharc (SHarc Acquires Receiver’s

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