Interferometric phase scintillation in the IPM

Details Interferometric phase scintillation in the IPM Interferometric phase scintillation in the IPM

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aipc..174...97d&link_type=abstract

IN: Radio wave scattering in the interstellar medium; Proceedings of the AIP Conference, San Diego, CA, Jan. 18, 19, 1988 (A89-2

Physics

Interplanetary Medium, Scintillation, Speckle Interferometry, Very Long Base Interferometry, Cross Correlation, Gratings (Spectra), Power Spectra, Solar Wind

Scientific paper

Using a global VLBI array operating at 327 MHz, strongly correlated scintillations are found in the fringe phase obtained on various baselines. Cross correlation of the fringe phase on different baselines reveals maximum correlation at some small lag, with the value dependent upon baseline pair. The lags of maximum correlation are fit very well by a model in which the phase fluctuation pattern is moving across the array with fixed velocity. Since the fit velocity is 410 km/s almost radially outwards from the sun, the interplanetary medium is responsible.

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