Directory Identifier: GRAVCD-spain97
Directory Title: Gravity Station Data for Spain
Principal Investigator: Dr Miguel J. Sevilla
Contributing Organization: Instituto de Astronomia y Geodesia
                           Facultad de Ciencias Matematicas
                           Universidad Complutense
                           28040 Madrid
                           Espana

Summary: The gravity station data total 28493 records. This data 
base was received in April 1997.  Principal gravity parameters 
include Free-air Anomalies which have been adjusted to the 
International Gravity Standardization Net 1971 (IGSN 71), and the 
gravity anomaly computation uses the Geodetic Reference System 1980 
(GRS80) theoretical gravity formula (Somigliana formula). The data 
are randomly distributed within the boundaries of Spain.