GUARDIAN is a near-real-time (NRT) ionospheric monitoring software for natural hazards warning. GUARDIAN uses NRT total electronic content (TEC) time series to allow users to explore ionospheric TEC perturbations due to natural and anthropogenic events on Earth, and characterize potential natural hazards. GUARDIAN aims to supplement the existing natural hazards early warning systems (EWS) and is currently the only software capable of providing multi-GNSS NRT TEC time series over the Pacific region to the general public and scientific community.

For further information, please refer to our peer-reviewed publication: Martire, L., Krishnamoorthy, S., Vergados, P., Romans, L. J., Szilágyi, B., Meng, X., Anderson, J. L., Komjáthy, A., Bar-Sever, Y. E. (2023) The GUARDIAN system - a GNSS upper atmospheric real-time disaster information and alert network, GPS Solutions 27(32), DOI 10.1007/s10291-022-01365-6.

GUARDIAN Scout searches earthquake and tsunami-like perturbations in the ionosphere in after a significant earthquake occurs to reduce the burden of data review for an ionospheric subject matter expert in its aftermath. GUARDIAN Scout consists of a Convolutional Neural Network (CNN) that is trained Sine-Gaussian wave packets generated by tsunamis and N-waves resembling atmospheric waves launched near the epicenters of earthquakes. These signatures are then embedded and labeled within recent data from GUARDIAN stations to train the CNN, and applied to the near-real-time data feed to identify similar signatures. GUARDIAN Scout is triggered only when an earthquake of magnitude 6.5 or greater occurs. GUARDIAN Scout is a research tool undergoing continuous improvement – signals identified automatically may or may not correspond to an actual earthquake or tsunami and are not intended as warnings or alerts of any kind.