Free-air anomaly
In geodesy, a free air anomaly is the difference between observed gravity and theoretical gravity that has been computed for latitude and corrected for elevation of the station above or below the geoid, by application of the normal rate of change of gravity for change of elevation, as in free air.
- http://www.dtic.mil/doctrine/jel/doddict/data/f/02209.html
- see also: gravity anomaly, physical geodesy