Accession Number : ADA258846


Title :   A Model of Global Positioning System (GPS) Master Control Station (MCS) Operations


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING


Personal Author(s) : Koster, David N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258846.pdf


Report Date : 15 Dec 1992


Pagination or Media Count : 210


Abstract : The United States Air Force's Navstar Global Positioning System (GPS) provides high-accuracy space-based navigation and time distribution to suitably- equipped military and civilian users. The system consists of earth-orbiting satellites and a world-wide network of ground stations. A single operational control center, the GPS Master Control Station (MCS) monitors, maintains, and commands the GPS satellite constellation. The on-going deployment of the complete satellite constellation and recent changes in the operational crew structure may invalidate previously used planning and management paradigms. There is currently no analytical method for predicting the impact of these and other environmental changes on system parameters and performance. Extensive testing cannot be performed at the MCS itself due to the criticality of the GPS mission and lack of operational redundancy. This research provides and validates a discrete event simulation model of the MCS operations center task flow, focusing on the creation and testing of a sliding-window MCS activity scheduler. The simulation was validated using MCS historical data. Experiments were conducted by varying the number of ground stations and satellite constellation size available to the simulation. The results, while not quantitatively trustworthy, were used to draw general conclusions about the GPS operational environment.... Navstar Global Positioning System, GPS, Operations control center, Master control station, MCS, activity scheduling, Simulation.


Descriptors :   *NAVIGATION SATELLITES , *GROUND STATIONS , *CONTROL CENTERS , *CREWS , *GLOBAL POSITIONING SYSTEM , SPACE ENVIRONMENTS , MODELS , NETWORKS , THESES , TIME , NAVIGATION , PLANNING , MISSIONS , MONITORS , FLOW , REDUNDANCY , SPACE NAVIGATION , IMPACT , MANAGEMENT , DEPLOYMENT , SPACE BASED , COMPUTERIZED SIMULATION , SIMULATION


Subject Categories : Space Warfare
      Underwater and Marine Navigation and Guidance
      Command, Control and Communications Systems


Distribution Statement : APPROVED FOR PUBLIC RELEASE