1. Australian Space Weather Services, RETE INTEGRATA NAZIONALE GPS, Estonian Land Board, and Virginia Tech Center for Space Science and Engineering Research. The Low Latitude Ionospheric Sensor Network (LISN) is a project led by the University of Texas at Dallas in collaboration with the Geophysical Institute of Peru and other institutions that provide information to benefit the space weather scientific community;For the ground magnetometer data we gratefully acknowledge: INTERMAGNET, Alan Thomson; CARISMA, PI Ian Mann; CANMOS, Geomagnetism Unit of the Geological Survey of Canada; The S-RAMP Database