| 21. | The Secure 1000 Backscatter X-ray scanner was developed in 1992 by Dr . Steve Smith.
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| 22. | This backscatter noise is used by network telescopes to indirectly observe large scale attacks in real time.
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| 23. | NASA also performed backscatter scanning of the lower liquid hydrogen / intertank flange stringers on 29 November.
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| 24. | Backscatter X-ray machines already are in use in South Africa to screen workers leaving diamond mines.
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| 25. | In 2007 the Transportation Security Administration introduced the first of its backscatter X-ray machines at PHX.
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| 26. | By filtering out all the backscatter signal close to the original transmitted frequency, moving targets become visible.
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| 27. | A backscatter peak can be seen at channel 150, similar to the second peak in Figure 1.
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| 28. | Rapiscan manufactures a controversial Backscatter X-ray system for screening airport passengers, the Rapiscan Secure 1000.
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| 29. | The advanced application of the alternative diffraction technique of Electron Backscatter Diffraction ( EBSD ) overcomes these limitations.
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| 30. | A single backscatter scan exposes the target to between 0.05 and 0.1 microsievert of radiation.
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