Mark Gallagher University of Hull, UK email: markga@comms.ee.hull.ac.uk The tar file contains 3 eps files of ionograms data. These were taken on an HF (2-30 Mhz) trial at on 8/8/90. They are data plots of the results from 2 sample scans using the chirpsounder monitoring software developed here at the university. The plots are were taken at various times on a Log-Per. wideband Ae. The path is Oslo (Nor) - Farnborough (UK). The plots should be compared to HF predictions to see their worth. especially the sporadic E identification. No warranty on the pictures is supplied and they are copyrighted to me, Mark Gallagher. If you intend to use them in any way, please email me for permission. They must not be altered in any way. The term chirpsounder is a trademark of Barry Research Inc.