Mission

Within the IERS Global Geophysical Fluids Center the Special Bureau for the Atmosphere (SBA) is a joint effort of Atmospheric and Environmental Research Inc. (AER) and the U.S. National Centers for Environmental Prediction (NCEP) to provide atmospheric data relevant to the study of the Earth's variable rotation.

Web site

https://aer.powerserve.net/science-research/earth/earth-mass-and-rotation/special-bureau-atmosphere/