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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instruction, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188) Washington DC 20503. AGENCY USE ONLY (Leave blank)2. REPORT DATE December 2010 REPORT TYPE AND DATES COVEREDMaster's Thesis 4. TITLE AND SUBTITLE Geolocation of LTE Subscriber Stations Based on the Timing Advance Ranging Parameter 6. AUTHOR(S) Leslie A. Jarvis, Jr. FUNDING NUMBERS PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)Naval Postgraduate School Monterey, CA 93943-5000 12a. DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release; distribution is unlimited 12b. DISTRIBUTION CODE ABSTRACT (maximum 200 words)The possibility of geolocating a Long Term Evolution (LTE) subscriber station based on the timing advance ranging parameter within the network signal internals is investigated in this thesis. The basic approach to geolocation based on radial distances from multiple base stations is outlined. Specifics of the timing parameters used during LTE network entry are examined as they relate to calculating these distances. Computer simulation is used to demonstrate expected geolocation accuracy in multiple base station networks when estimating likely locations of subscriber stations on a two-dimensional coordinate mapping system. Computer simulation is further refined to demonstrate expected geolocation accuracy in multiple base station networks when estimating likely locations of subscriber stations on a three-dimensional coordinate mapping scheme. The possibility of fixes with ten times greater accuracy than in previous results in literature are shown by applying timing advance techniques to Global System for Mobile communications networks when using a two-dimensional coordinate mapping scheme. Accuracy capable of being within 50 centimeters when using a three-dimensional coordinate mapping scheme, comparable to the accuracy in Global Positioning System technologies, are also shown. Submitted in partial fulfillment of the requirements for the degree of NUMBER OF PAGES 123 SUBJECT TERMS MASTER OF SCIENCE IN ELECTRICAL ENGINEERINGfrom the NAVAL POSTGRADUATE SCHOOL December 2010Author: Leslie A. Jarvis, Jr. are shown by applying timing advance techniques to Global System for Mobile communications networks when using a two-dimensional coordinate mapping scheme.

There are many unique challenges associated with providing remote access to space experimental payloads. The limited bandwidth to the space craft, the inability to physically monitor and probe the payload, and the management of access time for various researchers working on the project all compound to create a challenging work environment. The Configurable Fault Tolerant Processor (CFTP) project aims to alleviate many of the difficulties associated with remote payload operation. We have made use of modular FPGA design, which allows us to transfer only small application modules rather than full configuration files. This dramatically reduces the bandwidth required to upload new applications as we discover new experiments for the CFTP after launch. Another unique aspect of the CFTP project is the collaborative effort in its development. We must manage access time for universities and research institutions across the country for running experiments on the CFTP, downloading CFTP documents, and analyzing telemetry after launch.