Modulation - Demodulation Software Radio

摘要

The development of the RF-Seismograph and then the scanning RF-Seismograph was a very worthwhile undertaking. It gives us the opportunity to share propagation reports among many uses and makes use of the transceivers that sit idle in an unoccupied shack. We were already developing the RF-Seismograph when we found out that there will be a solar eclipse in a year from now in North America. At this time Guy also sent us the link and described what he and the amateurs in Europe (Belgium) were doing in 1999. During the development we were able to observe and confirm the standard model of propagation and the role the sun plays in it. But we were also able to extend the propagation model by showing how different phenomena can create workable propagation even when the solar flux is low. With the outreach program and our Yahoo user group we like to invite all amateurs to participate in the "Solar Eclipse 2017" experiment and then to forward the recorded data to solar scientists.