GPS ephemeris message broadcast simulation

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Authors
James J. Light.
Subjects
Advisors
Boger, Dan C.
Date of Issue
2005-09
Date
Publisher
Monterey California. Naval Postgraduate School
Language
Abstract
The warfighter constantly needs increased accuracy from GPS and a means to increasing this accuracy to the decimeter level is a broadcast ephemeris message containing GPS satellite orbit and clock corrections. The ephemeris message is produced at the GPS MCS (Master Control Station) which receives GPS signal data from NGA and Air Force worldwide and uses sophisticated software to produce the orbit and clock corrections. The problem is getting the ephemeris message to the tactical user in a forward operating area. This thesis proposed a notional architecture for pushing the ephemeris message to the tactical user. It then modeled the architecture and simulated the broadcast of the ephemeris message to a tactical user using NETWARS. The baseline architecture was simulated and analyzed and then additional constraints were placed upon the network to simulate a real-world model. The simulation results demonstrated that the architecture was feasible for ephemeris message broadcast with the constraints on time intervals between broadcasts, residual traffic and message size.
Type
Thesis
Description
Series/Report No
Department
Information Sciences (IS)
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
xiv, 69 p. : col. ill., 1 col. map ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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