Plotting a path between two points for 2 meter line of sight communications is an interesting exercise. The DX commander discovered a feature in Google Earth which allows the easy creation of a terrain elevation profile between 2 points with a couple of mouse clicks. This should be very useful for those, like me with an interest in 2 meter simplex or those working 2 meter side band. This is very short but interesting illustration of how to use this handy feature.
(2021-05-17, 08:05:43)marvin.double Wrote: [ -> ]Plotting a path between two points for 2 meter line of sight communications is an interesting exercise...
Hey Marvin, looks good. I have been using this website that Dave Newcombe forwarded last fall. It works very well although sadly it shows that I am pretty much trying to get through a large portion of earth to get out anywhere.
https://www.scadacore.com/tools/rf-path/...-of-sight/
Marvin your plot is hard to read, looks like an encrypted message to a spy :-)
I gave the Google Earth method a try for my QTH to VE3OSR. See attached.
I couldn't find a way to copy the graph so I used the snipping tool & pasted it into a LibreOffice Draw page. Had to add my mast elev. & OSR tower manually. The app in the link I sent to Richard is designed for this purpose, so it lets you input those parameters. I think Tom said OSR ant. was at 300' but I drew a 200' line as well. Easy to see why my net attendance was iffy until the link came up.
EM ground waves do bend around the curvature of the earth a bit so the actual range is a little more than direct line-of-sight.
73
Dave, VE3WI