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This Defense Intelligence Reference Document was prepared by the Defense Intelligence Agency under its Advanced Aerospace Weapon System Applications (AAWSA) program, is dated 6 April 2010 and is part of a series of advanced technology reports produced in FY 2009. It reviews proposed laboratory generators and detectors of high-frequency gravitational waves for communications. It favors an infrared-excited molecules transmitter and the Li-Baker detector, estimating about 1.9 million bits per second over 7,000 km through the Earth. It also discusses timing standards and interplanetary navigation uses.
“Masse”14 pages
UNCLASSIFIED//F811. 8FFll!l*L 1!1!11! 9HL"i' 4.5 2050 and Beyond ....................................................................................... 37 5.0 Acknowledgements ........................................................................................ 37 6.0 References ..................................................................................................... 37 Appendix A: Nomenclature ................................................................................... 44 Appendix B: Li-Baker HFGW Detector ................................................................... 45 Appendix C: Perturbative Photon Fluxes Generated By High-Frequency Gravitational Waves and Their Physical Effects .................................... 52 Figures Figure 1. Communication Link Block Diagram ........................................................ 2 Figure 2. Change in Centrifugal Force of Orbiting Masses, .dfct, Replaced by Change in Tangential Force, Aft, to Achieve HFGW Radiation ............................... 3 Figure 3. Circular Resonator Geometry Using Infrared Excitation .......................... 8 Figure 4. Radiation Pattern Calculated by Landau and Lifshitz (1975) ................... 8 Figure 5. GW Flux Growth Analogous to Stack of N Orbital Planes ......................... 9 Figure 6. Stack of Circular-Wave-Guide Plates With Typical Molecule Jerks, .df's ... 9 Figure 7. Omni-Directional Nature of the HFGW Radiation Pattern ....................... 10 Figure 8. Predicted Relic GW Energy Density as a Function of Frequency ............. 11 Figure 9. Birmingham University HFGW Detector ................................................. 13 Figure 10. INFN Genoa HFGW Detector ................................................................ 13 Figure 11. The National Astronomical Observatory of Japan 100 MHz Detector ... 14 Figure 12. Detection Photons Sent to Locations that are Less Affected by Noise .. 15 Figure 13. Quantum Back Action as a Mechanism for Creating the Standard Quantum Limit ..................................................................................... 17 Figure 14. Schematic of Ultra-Sensitive HFGW Detector ....................................... 21 Figure 15. Fractal Membrane Component of Li-Baker Detector Exhibited in Planar Form .................................................................................................... 21 Figure 16. Conceptual SNR Fill Factors: Signal and Noise Components ................ 23 Figure 17. A Block Diagram of a Typical Link Budget ............................................ 24 Figure 18. A Proposed Near Earth Distribution of Frequency Time Standard ........ 26 Figure 19. HFGW Supplemented Remote Terminal Design .................................... 27 Figure 20. Acquisition Search Space Improvement Accruing From HFGW FTS ...... 28 Figure 21. The Impact of Phase Noise Improvements on Phase Shift Encoding ... 29 Figure 22. The Impact of Frequency Noise Improvements on FDMA and FHSS ..... 30 Figure 23. The Earth's Associated Lagrangian Points ........................................... 31 Figure 24. HFGW Com Space Application Development Roadmap, Estimated Timeline .............................................................................................. 32 Figure 25. A GW Pair on Earth as Used by a Lunar Mission ................................... 34 Figure 26. A GW Pair on Earth and on the Moon, as Used by a Mission to Mars .... 35 Figure 27. A GW Pair on Earth and on Mars for an Outer Planetary Reference Pair ...................................................................................................... 35 iv UNCLASSIFIED/ ;rett err1e1111t 652 one I
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Report, from the dia collection. The PDF is mirrored here; the original link is under it. 57 pages are in the text index: search them above, or from the library's search.