The Downs and Ups of Gravity Surveys
via noaa.gov
Short excerpt below. Read at the original source.
The Downs and Ups of Gravity Surveys NOAA Heritage Deep Dive:An in-depth look back at gravity measurements. This story was originally published on NOAA’s 200th Anniversary website in 2007. The National Geodetic Survey maintains a gravity database covering the U.S. and surrounding areas. This database contains measurements of the acceleration of gravity at over two […]