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Title: A New Concept In Data Communications
Author: Collin Cagle
Source: 1990 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1990
Abstract: When compared to traditional methods such as microwave, leased line and radio, VSAT technology has been leading the advance in providing new means of connectivity for remote data collection applications. It has only been in the last three years that the application of VSAT (Very Small Aperture Terminal) networking to bidirectional data transmission has become widely accepted. Current estimates place the installed VSAT base at over 20,000 sites transmitting two-way data, and in come cases also supporting voice and even receiving one-way video. Possibly the market which initially exhibited the widest acceptance of satellite communication technology is the retail market. Corporations such as Wal-Mart, K-Mart, Target, Service Merchandise and Walgreens were some of the first to see the advantages offered by VSAT technology. Benefits associated with the operation of a satellite communication based network include lower recurring costs than terrestrial leased lines, predictable costs, multiple application support, high system availability, and freedom from dealing in a multiple vendor environment. Many, if not all, of these advantages also apply to most gas pipeline data networking requirements. Tenneco, ENRON, Columbia Gulf, El Paso Natural Gas, and Lone Star Gas are presently utilizing various implementations of VSAT technology to provide the data transport for monitoring and control of gas pipeline operations. Initially, some limited numbers of VSATs were selected for SCADA applications due to the simple fact that at some critical locations, there were no available terrestrial alternatives.

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