IAG / GGOS

Organizations & Services

• IAG : International Association of Geodesy
• GGOS : Global Geodetic Observing System

Gravity Services

• IGFS : International Gravity Field Service (IGFS)
• BGI : International Gravimetric Bureau (BGI)
• ISG : International Service for the Geoid (ISG)
• IGETS : International Geodynamics and Earth Tides Service (IGETS)
• ICGEM : International Centre for Global Earth Models (ICGEM)
• IDEMS : International DEM Service (IDEMS)
• COST-g : International Combination Service for Time-variable Gravity Fields

Global Gravity Data Compilation Centers

• NGA/Office of Geomatics : National Geospatial Inteligence Agency
• NGDC/NOAA : National Geophysical Data Center

Gravity manufacturers

• Micro-g LaCoste : Micro-g LaCoste
• Scintrex : Scintrex
• GWR : GWR instruments
• Exail : exail / iXblue
• CMG : Canadian Micro Gravity

Free gravity software

Many gravity software are available free-of-charge from : Computers & Geosciences (Elsevier)

Other open-source programs…

• GSS : Geophysical Software Solutions ( Source : GGS, Camberra, AU)
• TSOFT : Analysis of Time Series and Earth Tides (source : Royal Observatory of Belgium, BE)
• FastGrav : Quick simple gravity modeling software for Mac and PC (source Trinity Univ., San Antonio, Texas, USA)
• gTOOLS : Open-source program for processing high precision, relative gravity data for time-lapse gravity monitoring (source : USGS, USA)