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This Defense Intelligence Reference Document, DIA-08-1004-005, is dated 6 April 2010. The Defense Intelligence Agency's Defense Warning Office prepared it under the Advanced Aerospace Weapon System Applications program. It reviews proposed laboratory generators and detectors for high-frequency gravitational waves. It favors a piezoelectric approach for proof-of-concept tests, IR-excited molecules for an operational transmitter and the Li-Baker detector as the receiver. It estimates about 1.9 million bits per second over 7,000 km through the Earth and discusses timing standards and interplanetary navigation uses.
From the source:Release of 2026-09-18 Incident: 4/6/10, Las Vegas, Nevada. Released with redactions. This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD examines whether high-frequency gravitational waves could serve as a communications medium while avoiding the attenuation that limits radio-frequency systems. The report surveys proposed transmitter and detector concepts, argues that gravitational-wave communications could support secure point-to-point links, timing standards, and interplanetary navigation, and gives particular attention to laboratory generator concepts and the Li-Baker detector as possible building blocks for such a system. The document makes clear, however, that the entire concept depends on capabilities that had not been demonstrated in practice, including laboratory-scale generation and reliable detection of usable high-frequency gravitational-wave signals. It is an exploratory systems-oriented review built around a future communications concept.
UNCLASSIFIED//EOR OEEICI0L Llili QI\IL¥ Li, F. Y. and Baker, R. M L, Jr. (2007), "Detection of High-Frequency Gravitational Waves by Superconductors," 6th International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials, Sydney, Australia, January 10; International Journal of Modern Physics 21, Nos. 18-19, pp. 3274-3278. Li F.Y., Baker R. M Land Fang Z. (2007), " Coupling of an open cavity to a microwave beam: a possible new scheme for detecting high-frequency gravitational waves," after peer review accepted for the Proceedings of the AIP Space Technology and Applications Int. Forum, Albuquerque, New Mexico 880, 1139-1147. Li F. Y., Baker R. M L, Jr., Fang Z., Stephenson G.V. and Chen, Z. (2008), "Perturbative Photon Fluxes Generated by High-Frequency Gravitational Waves and Their Physical Effects," European Phys. J. C 22, Nos. 18-19, 30 July; available at http://www.drrobertbaker.com/docs/Li-Baker%20Chinese%20HFGW%20Detector.pdf http://www.gravwave.com/docs/Li-Baker%206-22-08.pdf (please see Appendix C). Li, Fangyu and Yang Nan (2009), "Phase and Polarization State of High-Frequency Relic Gravitational Waves," Journal of Chinese Physics Letters (in press) . Misner, C. W. Thorne, K. and Wheeler, J. A. (1973), Gravitation, W. H. Freeman and Company, New York. Ottaway, D. J. et al (1998), "A Compact Injection-Locked Nd:YAG Laser for Gravitational Wave Detection," IEE Journal of Quantum Electronic 34, Number 10, October 9. Pegoraro, F., Radicati, L. A., Bernard, .Ph. and Picasso, E. (1978), Phys. Rev. Letters A 68, p. 165. Pinto, I. P. and Rotoli, G. (1988), "Laboratory generation of gravitational waves?" Proceedings of the 8th Italian Conference on General Relativity and Gravitational Physics, Cavlese (Trento), August 30 to September 3, World Scientific-Singapore, pp. 560-573. Romero, F. Band Dehnen, H. (1981), "Generation of gravitational radiation in the laboratory," Z. Naturforsch 36a, pp. 948-955. Rudenko, V. N. and Sazhin, M. V. (1980), "Laser interferometer as a gravitational wave detector," Sov. J. Quantum Electron 10, November, pp. 1366-1373. Rudenko, V. N. (2003), "Optimization of parameters of a coupled generator-receiver for a gravitational Hertz experiment," paper HFGW-03-113, Gravitational-Wave Conference, The MITRE Corporation, May 6-9. Shannon, C. B. (1948), Bell Systems Technical Journal, Volume 27, Number 379, p. 623. Shawhan, P. S. (2004), "Gravitational Waves and the Effort to Detect them," American Scientist 92, 356. (Explains why UGO cannot detect HFGWs.) Stephenson, G. V. (2009a), "Lessons for Energy Resonance HFGW Detector Designs Learned from Mass Resonance and Interferometric LFGW Detection Schemes," Space, Propulsion and Energy Sciences International Forum (SPESIF), 24-27 February, ed. G. UNCLASSIFIED/ /FOR OEEICIJ.b HSI!! Dflti 42
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 57 pages are in the text index: search them above, or from the library's search.