The expedition of the Harvard College Observatory, the Smithsonian Astrophysical Observatory, and the National Geographic Society to Miahuatlán, Mexico, to observe the total solar eclipse of 7 March 1970, is described. Instrumentation included a coronal spectrograph, television cameras recording on videotape, telescopes for photography of coronal polarization, and cameras for direct photography. Photographs and preliminary microphotometer tracings are included.
© 1970 Optical Society of America
Original Manuscript: June 11, 1970
Published: December 1, 1970
D. H. Menzel and J. M. Pasachoff, "Eclipse Instrumentation for the Solar Corona," Appl. Opt. 9, 2626-2630 (1970)