The DXZone.com Amateur Radio Internet Guide
///////////////////////////////////////////
Real-time ionogram
Posted:
https://www.dxzone.com/dx34355/real-time-ionogram-.html
Propagation/MUF Indicators
This page displays the current ionogram and tries to determine the nearest
digisonde report to your location. Data coming from this sondes are used to
determine the MUF for oblique propagation on HF spectrum