The Antarctic Geospace and ATmosphere reseArch (AGATA) Programme Planning Group is a coordinated, worldwide effort to monitor, investigate and better understand the physics of the polar atmosphere and the impact of the Sun-Earth interactions on the polar regions. AGATA will take advantage of existing and planned instrumentation in Antarctica, but also in the Arctic and satellite-based observations, and it will aim for coordinated research efforts and data exchange. This bi-polar perspective will allow the study of significant interhemispheric asymmetries in the atmospheric response observed in the polar regions.