------------------------------------------------------------------- This directory contains the software developed by the late John E. Jackson for the inversion of topside sounder ionograms into electron density profiles. Please consult the PROGRAM_DESC.DOC file for an explanation of the various files and how to run the program. The method and its uncertainties are described in several articles listed at the end of this text file. The files in this directory and the PROGRAM_DESC.DOC documentation file were kindly provided by W.B. Schar (RITSS) and R.F. Benson (GSFC, Code 692). Their effort has helped to enhance the usability of this software product. J.E. Jackson, The Analysis of Topside Ionograms, GSFC Report X-615-67-452, September 1967. J.E. Jackson, The Reduction of Topside Ionograms to Electron Density Profiles, Proc. IEEE, 57, #6, 960-985, 1969. J.E. Jackson, The P'(h) to N(h) Inversion Problem in Ionospheric Soundings, GSFC Report X-625-71-186, May 1971. --------------------------------------------------------------------------