Accession Number : ADA302515

Title :   Potential Applications of the ORBCOMM Global Messaging System to US Military Operations.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Coverdale, David R.

PDF Url : ADA302515

Report Date : JUN 1995

Pagination or Media Count : 93

Abstract : The author presents a detailed description of the components, architecture, links, and operations of the ORB COMM global messaging and position determination system. ORB COMM is the first commercial venture to offer worldwide personal communications service (PCS) using non-voice-non-geostationary (NVNG) low earth orbit (LEO) satellite technology. Link budget analyses of the system's satellite up and down links are presented. The author analyzes ORB COMM's proprietary multiple access scheme for random access channel interference and describes how the system's modified ALOHA protocol achieves a higher throughput than pure or slotted ALOHA based systems. Several commercial and DoD applications of the system are discussed, including beaconing, data exchange, tracking, and two way messaging. Specific DoD applications of ORBCOMM include combat sea-alr rescue (CSAR) and deployable communications networks for use in operations other than war (OOTW). With DoD taking. an active role as a cooperative partner, ORB COMM can satisfy the need for a low-cost, commercial space-based system to enhance US military global communications.

Descriptors :   *GLOBAL COMMUNICATIONS, MILITARY OPERATIONS, WARFARE, DEPLOYMENT, COMMERCE, INFORMATION EXCHANGE, EARTH ORBITS, LOW ORBIT TRAJECTORIES, TRACKING, THESES, RANDOM ACCESS COMPUTER STORAGE, POSITION FINDING, COMMUNICATIONS NETWORKS, ARTIFICIAL SATELLITES, ELECTROMAGNETIC INTERFERENCE, MILITARY APPLICATIONS, SATELLITE COMMUNICATIONS, THROUGHPUT, COMMUNICATION AND RADIO SYSTEMS, SYSTEMS ANALYSIS, MESSAGE PROCESSING, MULTIPLE ACCESS, MULTICHANNEL COMMUNICATIONS, SPACE BASED.

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE