Status of and Scientific Results from the ISIS-I Topside Digital Ionogram Data Enhancement Project [STUB]

Selected original analog telemetry tapes from three of the topside-sounder satellites of the International Satellites for Ionospheric Studies (ISIS) program, namely Alouette 2, ISIS I, and ISIS II, were used in an earlier project to produce more than 1⁄2 million digital topside ionograms; the resulting digital topside ionograms from ISIS II were used to produce more than 86,000 globally-distributed vertical topside ionospheric electron density profiles Ne(h) that cover a time span of more than a solar cycle. These Ne(h) were produced using the TOPIST auto-scaling software. Before attempting to automatically process Alouette-2 or ISIS-I ionograms a data-enhancement project was initiated so as to increase the autoprocessing success rate. These enhancements were mainly to correct problems that often occurred during the analog-to-digital conversion of the original telemetry tapes. Here we present the status of, and results from, this ongoing enhancement effort.