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Scintillation index (SI) is a key metric for free space optical communications (FSOC), and measures the normalised intensity variance caused by atmospheric turbulence. It is a function of the refractive index structure parameter Cn2, range, and receiver aperture. There is a need for an atmospheric simulation model of the effects of scintillation because testing of FSOC performance in the environment...
Spatial probabilistic temporal (SPOT) databases are a paradigm for reasoning with probabilistic statements about where a vehicle may be now or in the future. They express statements of the form "Object O is in spatial region R at some time t with some probability in the interval [L,U]." Past work on SPOT databases has developed selection operators based on selecting SPOT atoms that are entailed...
XUV diffraction using radiation generated by high harmonic generation is used simultaneously to determine both the structure and the complex refractive index of a partially ordered array of 196 nm diameter polystyrene spheres.
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