Correcting VLBI observations for ionospheric refraction

Details Correcting VLBI observations for ionospheric refraction Correcting VLBI observations for ionospheric refraction

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jatp...57..163s&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 57, no. 2, p. 163-167

Physics

1

Atmospheric Correction, Atmospheric Refraction, Earth Ionosphere, Very Long Base Interferometry, Astronomical Interferometry, Ionosondes, Radio Interferometers, Satellite Networks, Satellite Observation

Scientific paper

Radio astronomical observations with local interferometers and very long baseline interferometers (VLBI) are affected by atmospheric (i.e. tropospheric and ionospheric) refraction. A procedure to correct VLBI observations for ionospheric refraction using simultaneous ionospheric measurements is outlined. If networks of ionosonde and satellite observing stations operate during the astronomical VLBI observations, pathlength corrections ranging from several times the VLBI observing wavelengths to a fraction of this wavelength using the simultaneously collected ionospheric data are possible, provided that the geographical distribution of these ionosphere stations is similar to the VLBI network.

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