Instantaneous positions of microwave solar bursts: Properties and validity of the multiple beam observationsC.G. Giménez de Castro, J.-P. Raulin, V. S. Makhmutov, P. Kaufmann and J. E.R. CostaAstron. Astrophys. Suppl. Ser., 140 3 (1999) 373-382DOI: https://doi.org/10.1051/aas:1999428