OBJECTIVE: Demonstrate key technologies to enable application of gravitational radiation theory and research to military communications and navigation. DESCRIPTION: There is a need for world-wide communications and navigation systems which do not need a sky-view link or line-of-sight and which are less vulnerable to threat activity. Satellite communication and navigation systems are vulnerable to interdiction and are expensive to maintain and operate. One, very high risk approach is the adaptation of gravitational radiation (GR) to communications. GR is unaffected by obstructions such as the mass of the earth and thus offers a promise of world-wide, ground-based communications and navigation systems. The scientific communities of the United States and other countries have devoted substantial resources to GR theory development, technology development, and experimentation to observe cosmological radiation. The first scientific experiments to detect GR were performed in the U.S. with weber bars. More recently, the U.S. has expended significant resources in developing the science and technologies for the Laser Interferometer Gravitational-Wave Observatory (LIGO). Foreign countries are also investing in research in similar activities such as MiniGRAIL (in The Netherlands), Virgo (in Italy), GEO 600 (in Germany), and TAMA 300 (in Japan). The scientific community is optimistic that GR will be directly detected within the next decade. The transition of the GR science and technologies to military GR applications requires significant additional innovative research in several enabling technology areas beyond those of interest to the cosmological GR researchers. A successful GR communications system will require both a GR transmitter and a GR receiver. Current technology development is focused solely on GR detectors. The system needs to allow adequate bandwidth for communications. Current scientific GR detectors operate in the sub-Hz to few KHz range. The size of the GR system needs to be militarily useful. The current LIGO systems in Washington and Louisiana have detector arms several kilometers long. Implicit in the above is the most significant challenge, i.e., the detection of gravitational radiation. GR has not yet been directly detected. This topic seeks innovative concepts for the application of GR to military communications. The concept should be supported by scientific literature or analysis based upon general relativity theory or quantum mechanics theory. The concept should provide sufficient detail to permit the high-level visualization of a system and the identification of key technologies that need to be developed. A field or laboratory validation of one or more key technologies is essential. The maturation of the concept should be phased with definitive advancements in technology. PHASE I: Develop the underlying scientific approach to achieving a GR-based military communications system. Define the underlying technologies required to implement the system. Perform an analysis of the proposed system to include an estimate of the magnitude of GR emitted and an estimate of the sensitivity of the GR receiver. PHASE II: Conduct an experiment to demonstrate one or more of the critical technologies needed to implement a system. The focus should be on the generation and detection of a GR carrier wave and not on the transmission of information. A fully successful experiment would result in the generation and detection of GR. PHASE III: Initially, a successful GR communications system could replace existing high-priority communications with ground-based systems to reduce vulnerability. Eventually, it could replace satellite-based communications and navigations systems. Eventually a successful GR communications system would replace existing high capacity, long-haul point-to-point communications systems. This would reduce requirements for extensive ground infrastructure and maintenance. REFERENCES: 1) Stephen J. Minter, Kirk Wegter-McNelly, Raymond, Y. Chiao,"Do Mirrors for Gravitational Waves Exist?"arXiv.org,"http://arxiv.org/abs/0903.0661". 2) Robert M. L. Baker, Jr.,"The Li-Baked High Frequency Relic Gravitational Wave Detector,"12 August 2010,"http://gravwave.com/docs/2010 Russia Lect .ppt". 3) R. Clive Woods, Robert M.L. Baker, Fangyu Li, Gary V. Stephenson, Eric W. Davis, Andrew W. Beckwith,"A New Theoretical Technique for the Measurement of High-Frequency Relic Gravitational Waves,"Journal of Modern Physics, 2011, 2,498-518,"http://www.scirp.org/journal/PaperInformation.aspx?paperID=5625"4) L. Gottardi, A. de Waard, A. Usenko, and G. Frossati,"Sensitivity of the spherical gravitational wave detector MiniGRAIL operating at 5 K.", 1 May 2007,"http://arxiv.org/pdf/0705.0122v1.pdf"5) Website: High Frequency Gravitational-Wave Detector,"http://www.sr.bham.ac.uk/gravity/project.php?project=MHzDetector".