Synoptic maps of solar 9.1 cm microwave emission from June 1962 to August 1973

The distribution of microwave emission over the sun at a wavelength of 9.1 cm was mapped by the Stanford spectroheliograph on nearly every day from June 1962 to August 1973. As these spectroheliograph records form a valuable resource for comparison with other solar and terrestrial data, they have been reduced to a homogenous format and are now available in the form of numerical printout, contour diagrams, movies, punched cards and 9-track magnetic tape. As a visual guide to the content of the records, this publication presents monthly synoptic maps formed by assembling the meridian data. In addition, the course of development over this 11-year interval is illustrated by a microwave butterfly diagram and by 12 annual average microwave maps