We were just passed along a great article: With Just a WSPR by Dan Romanchik, KB6NU. If you’ve never read about WSPR, it’s a great way to see which bands are open. Read the snippet below regarding this mode and follow the link to read the full article.
It’s really amazing what you can do with computers in amateur radio, and there’s been an explosion in the number of digital modes. One interesting mode that I’ve recently been introduced to is WSPR, which is short for Weak Signal Propagation Reporting. The protocol and the original WSPR program was written by Joe Taylor, K1JT, and is designed for sending and receiving low-power transmissions on the HF bands to test propagation paths.