spase://GBO/NumericalData/SuperMAG/Magnetometers/PT1M

These data consist of uniformized magnetic variation data created by SuperMAG from data received from over 200 ground observatories worldwide. Data are made into 1-min resolution, are cleaned for errors and artifacts, are converted to a NEZ coordinate system (N and E are local magnetic North and East, Z is vertical down), and have their dominant and slowly varying Earth field components (i.e., baselines) subtracted out. Thus the data are intended for studies of effects of variable ionospheric and magnetospheric current systems. Data are available as line plots, as northern and southern hemisphere maps, and as underlying IDL saveset files. User registration is required prior to data access.