Marzano, Frank S., Luigi Mereu, Mario Montopoli, Domenico Cimini, and Giovanni Martucci. 2015. “Annex To: Volcanic Ash Cloud Observation Using Ground-Based Ka-Band Radar and Near-Infrared Lidar Ceilometer During the Eyjafjallajökull Eruption”. Annals of Geophysics 57 (March). https://doi.org/10.4401/ag-6762.