Extended radar observations of the sun will provide new knowledge about its corona

During the 11-week period from April 19 to July 7, 1961, the Lincoln Laboratory of the Massachusetts Institute of Technology made a series of 32 radar measurements of reflections from the sun. This was the first time that regular measurements have been possible over an extended period. Results of the measurements are reported in the December 1961 issue of the Journal of Geophysical Research.