The Lowell Umass ionosonde is maybe the bfief squawk you hear on HF bands as the exploring beam scans across your frequency.
Turns out that there is a lot of information from these scans available from https://giro.uml.edu/index.html, in many graphic forms, for example:
Word to the wise: click the c…login to view the rest of this post
GIRO GLOBAL IONOSPHERE RADIO OBSERVATORY - Ionograms
GIRO GLOBAL IONOSPHERE RADIO OBSERVATORY - Ionograms
Welcome Guest! All the pictures, downloads and more when you SIGN IN free. - It's OK to ponder what you just missed..and sign in!
You have noticed the Guest Sampler!
You clearly like it here, so Come In Now... :)
First time here?
Callsign (or a name) and an email -that's all!
Full Access, subscribe to topics, chat and search
We never share your email or track you.