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.