the following is an excerpt from the ARLP013 Propagation de K7RA From Tad Cook, K7RA Seattle, WA March 30, 2012
<quote> "Q-up Now" has a fascinating new set of real-time propagation tools at http://www.q-upnow.com/, developed by a team associated with the Utah State University Space Weather Center (http://spaceweather.usu.edu/) in Logan, Utah. They use a real-time model of the ionosphere called GAIM (Global Assimilation of Ionospheric Measurements) which is updated every 15 minutes with 10,000 global TEC (Total Electron Content) measurements to simulate the F layers. Then they use the ABBYNormal Model (see http://gcmd.nasa.gov/records/abbyNormal.html) to model the D and E layers, and the two models are combined to give a complete representation of the global ionosphere. On the first page you will see NVIS maps for Near Vertical Incidence Skywave propagation. These are not quite ready yet, and currently the maps shown are several days old. Most interesting is the HF Availability (http://www.q-upnow.com/hf-availability) area in which you can model real-time propagation for the frequency of your choice between any two points and beyond out to the antipodes. You can use latitude/longitude coordinates, but I found it easiest to just copy grid square data from callsign servers such as http://www.qrz.com. This tool also works on 160 meters, which the propagation prediction programs that many of us use do not. Of course the major difference with this tool is that it tells you what the propagation should be over any path right now, but they are planning on offering a predictive tool. </quote> -- GB & 73 K5OAI Sam Morgan _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
