The High Resolution Ne File. These data are based on measurements of the electron saturation current or the ion saturation current taken from as many voltampere curves as the telemetry data rate permitted. Since Ne is assumed equal to Ni everywhere in the ionosphere, either can be used as a measure of Ne. The ion current is used at high densities (Ni > 4x104cm-3) and the electron current is used at lower densities. Typically, 4 to 8 high resolution density samples are obtained in the interval between recovered voltampere curves, although this ratio is bit rate dependent. This provides Ne and Ni measurements at much smaller intervals than is possible from the voltampere curves themselves. High resolution measurements are typically available at 2 to 8 second intervals depending upon the telemetry rate available to the OETP at the time.