Looking up the inside of a Bilby tower to the bottom of the observing platform.
Image ID: geod1165, NOAA's Geodesy Collection Photographer: Commander George Leigh, NOAA Corps (ret.) • High Resolution Photo Available
Publication of the U.S. Department of Commerce, National Oceanic & Atmospheric Administration (NOAA), NOAA Central Library NOAA Privacy Policy | NOAA Disclaimer Last Updated: September 30, 2009