Multi-wavelength Optical Switch Fabric for Next-Generation Optical Switches

Author(s):  
Islam Ashry ◽  
Ishac Kandas ◽  
Mohamed Eltoweissy
2012 ◽  
Vol 8 (S291) ◽  
pp. 211-216 ◽  
Author(s):  
J. M. Cordes

AbstractThis paper summarizes how multi-wavelength measurements will be aggregated to determine Galactic structure in the interstellar medium (ISM) and produce the next-generation electron density model. Fluctuations in density and magnetic field from parsec scales down to about 1000 km cause a number of propagation effects in both radio waves and cosmic rays. Density microstructure appears to include Kolmogorov-like turbulence. The next generation electron-density model, NE2012, will include about double the number of lines of sight with dispersion and scattering measurements and it will be anchored with a much larger number of pulsar parallax distances. The foreground Galactic model is crucial for inferring similar ionized structures in the intergalactic medium (IGM) from scattering measurements on high-z objects. Intergalactic scattering is discussed with reference to distant sources of radio bursts. In particular, the cosmological radio scattering horizon is defined along with its analog for the ISM.


2004 ◽  
Vol 40 (25) ◽  
pp. 1600 ◽  
Author(s):  
J.E. Simsarian ◽  
J. Gripp ◽  
M. Duelk ◽  
R. Peiró ◽  
P. Bernasconi ◽  
...  

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