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& Intelligent Transportation Systems Research > Enabling
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NDGPS Publications
PUBLICATION
Site Selection Plan & Installation Guidelines
for a Nationwide Differential GPS Service
FHWA CONTACT
Jim Arnold (James.A.Arnold@fhwa.dot.gov)
AUTHORS
Ronald L. Ketchum, John J. Lemmon, J. Randy Hoffman
The authors are with the Institute for Telecommunication Sciences, National
Telecommunications and Information Administration, U.S. Department of
Commerce, Boulder, Colorado 80303
ABSTRACT
The Global Positioning System (GPS), in its current form, is used within the
transportation industry for vehicle tracking and navigation. With the advent
of a nationwide differential GPS (DGPS) service, this role will expand to
include public safety, infrastructure management, mayday services, and other
yet unknown applications. The U.S. Department of Transportation is
considering a nationwide DGPS service, modeled after the U.S. Coast Guard's
Local Area Differential GPS system, to support surface applications. This
service, when fully implemented, will provide accurate navigation and
positioning information across the nation, promoting safety and efficiency
in transportation and other fields.
The purpose of this document is to familiarize individuals
responsible for the implementation of a DGPS system with the concept,
configuration, operation, and performance of a nationwide DGPS service.
The general requirements for DGPS broadcast site selection, and the
recommended locations of broadcast sites, to complete nationwide coverage
of the DGPS correction signal, are presented. The equipment required
for broadcast site operation is described, along with the basic operation
of this equipment.
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