| Brief descriptions of the IGS Components |
| Station-Operating Agencies | Manage the IGS stations according to the IGS Site Guidelines and transmit the data to IGS Data Centers |
| Analysis Centers (ACs) | analyze the IGS station data to form submissions to IGS products such as orbits, clocks, and station positions |
| Analysis Center Coordinator (ACC) | Combines the ACs' submissions to form the "classic" IGS products (GPS orbits, clocks) |
| Other Product Coordinators | Combine AC submissions to form specialized IGS products such as timescale, reference frame, or atmospheric products. |
| Data Centers (DCs) | Archive and provide open access to IGS Data and products
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| Associate Analysis Centers (AACs) | Produce specialized or derived products, such as ionospheric or tropospheric products, regional position/velocity products, or global coordinate/velocity covariance information. |
| Central Bureau (CB) | Overall coordination and day-to-day management of the IGS, and this information system |
| Associate Members | Persons at contributing organizations who spend the majority of their time on work that contributes to the IGS. The associate members are the IGS' electorate.
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| Governing Board (GB) | The international body which sets policy and direction for the IGS. Some positions are elected and others are appointed. |
| Pilot Projects (PPs) | Aim at developing a new product using data from the IGS network |
| Working Groups (WGs) | Work on a particular topic related to the IGS components |
| Contributing Organizations | Any agency fulfilling at least one of the roles above |
