Working Groups have been established to investigate particular topics related to the IERS components. (For more details about the terms of their work, please consult the Terms of Reference.)

Current working groups

• Working Group "Metrology of space geodetic infrastructure"
• Working Group on SINEX Format
• Working Group on the Consistent Realization of TRF, CRF, and EOP
• Working Group on the Prediction of Earth Orientation Parameters
• Working Group on GENESIS
• Working Group "Evaluation of the Terrestrial Reference Frames"

Former working groups

For the results of the work of previous working groups, please refer to the historical web pages.

• Working Group on Combination
• Working Group on Prediction
• Working Group on the Second Realization of the ICRF
• Working Group on Combination at the Observation Level
• Working Group on Site Coordinate Time Series Format