Abstract

The Nobeyama radioheliograph is a dedicated instrument which produces solar images at 17 and 34 GHz for about 8 hours daily with a time resolution of 100 ms and a spatial resolution of about 10". We use the daily best images obtained during the Whole Sun month (August 10 - September 8, 1996) to produce synoptic map of the Sun. We compare the microwave synoptic map with maps obtained from several of the SOHO instruments and from other ground based data. Specifically, we look for counterparts of the large scale features such as filaments, coronal holes and active regions in various synoptic maps.