GSAC is web services for discovery of instrumented site information, and of instrument data files, available in an archive, to provide site and instrument information in a variety of standard formats (RINEX, XML, csv, GAMIT, SINEX, Json, png, ...), and to show where (URLs) to download instrumental data and derived-product files.
GSAC is intentionally built to handle many kinds of Earth science data from instruments with Earth locations, and derived products from such data. For example...