Hi, I have a basic LF skywave program that Doug Hensen has written. I have done a simple data run based on the Paris France to Nags Head path for January 15th. I will have the program and the data this Thursday for all to examine and discuss. Frank -- Frank Gentges K0BRA, ex AK4R, W3FGL Check out our LF web page at <http://amrad.org/projects/lf>