The Commission began its history with the birth of the IAU at the Brussels Conference in 1919, where Standing Committee 19 “Latitude Variations” was established. At the first IAU General Assembly in 1922, Standing Committee 19 became Commission 19 “Variation of Latitude”. Later, as the topic of the Commission was expanded to include observations and the theory of Earth’s rotation and interconnection between Earth’s rotation and geophysical phenomena, in 1964 it was renamed Commission 19 “Rotation of the Earth”. In 2015, Commission 19 was renewed as Commission A2 “Rotation of the Earth” (CA2) with the same functions. In 2021, CA2 was renewed for the next 6-year term
Malkin Z, Dehant, V., & et al. (2024). There are four space geodetic services belonging to the International Association of Geodesy (IAG). They are documented here below.https://hdl.handle.net/2078.5/238655