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Started by alpine, February 18, 2010, 03:45:01 PM
QuoteThe GPS III program objective is to develop and deploy an improved systems architecture for the NAVSTAR Global Positioning System (GPS) to assure reliable and secure delivery of enhanced position, velocity, and timing (PVT) signals for the evolving needs of GPS civil and military users. GPS III eliminates numerous existing shortcomings and vulnerabilities inherent in the current GPS architecture that threaten to severely impact vital civil commerce, transportation, public safety, as well as military operations in the future.GPS III enhances U.S. leadership in space-based navigation by meeting the stated Presidential goal of establishing GPS as a world standard. GPS III supports the Federal Radionavigation Plan and will be fully interoperable with all current global radionavigation systems. The GPS III system also incorporates the Nuclear Detonation Detection System (NDS) and provides a potential platform for supporting additional synergistic payloads and services. The Government intends to use an evolutionary development approach. This approach includes using a modular open systems architecture, standard interfaces and protocols, and continuous technology refresh, to incrementally improve system capabilities with a low risk of GPS service interruption.The next-generation GPS III system is expected to have about 500 times the transmitter power of the current system, multiplying its resistance to jamming. With a constellation of 30-32 satellites, GPS III will have Second and Third Frequencies to contain civilian signal, (L2 = 1227.60 MHz) & (L5 = 1176.45 MHz), more robust signal transmissions, and provide real-time unaugmented 1 meter accuracy.
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