Structure and photometry of the solar corona at the total eclipse of 1997 March 9

At the solar total eclipse of 1997 March 9, we made a series of photographi c observations of the solar corona in Mohe City (Xilinji), Heilongjiang Pro vince. On images taken with different exposures, there are many characteris tic coronal structures including long and broad coronal streamers in both e ast and west equatorial regions, plumes containing over 20 polar rays as we ll as coronal holes in both south and north polar regions. Comprehensive re sults of measurements of the structures and brightness in the coronal image s, and of the morphology and structures, and isophotometric contours and br ightness profiles in both east and west equatorial regions and both south a nd north polar regions are presented.