English: Skywave propagation example taken from PSK Reporter. This amatuer radio station is using the 10 meter band and the ring of pink dots shows where the first skip of signal is heard with additional stations reporting the station further out in the Atlantic ocean.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.