An on-line data base consisting of the auroral oval boundaries, structure, and particle fluxes from the DMSP F7 and F9 satellites from December 1983 through the present (with about an 7-month lag) is announced. The data are divided into distinct regions (e.g., diffuse aurora, discrete aurora, cusp proper, polar rain, etc.). The magnetospheric sources of the various particle precipitation regions are identified using a sophisticated pattern recognition technique (a neural network). For each region the boundaries are specified in both geographic and geomagnetic coordinates, and the average and peak values of the particle fluxes are given, along with the average energies. The DMSP satellites are continuously monitored, so that data gaps are comparatively rare. It is anticipated that the location of auroral oval (and precipitation intensities) will be of particular interest to ground-based observers; although anyone interested in the state of the auroral oval may find it of value. SPAN data requests are processed on a completely automated basis, with up to 48 hours of auroral oval parameters provided in response to a single request. ¿American Geophysical Union 1991