The Nanaimo Amateur Radio Association is seeking your help to advertise our radio propagation tests on Saturday May 31, 2025.
In 2023 NARA carried out some practically based NVIS (Near Vertical Incident Skywave) propagation tests. During daylight the D-Layer forms and on the lower frequency bands the D-Layer attenuates signals thus reducing ranges. A stark example of the D-later attenuation is that Medium Wave broadcast signal from a distance can not be heard during daylight. When the D-layer disappears at night longer distance AM broadcast signals can easily be heard.