VOA Radiogram is a Voice of America program experimenting with digital text and images via shortwave broadcasting. It is produced and presented by Dr. Kim Andrew Elliott.
VOA Radiogram listener Mark Hirst, 2E0ECN, in England, compiled an excellent presentation explaining VOA Radiogram to his local amateur radio club.
The 33-page pdf file can be downloaded from here:
https://onedrive.live.com/redir?resid=F24C5799D08FDF1E%21507
