I think I can say I have the drop of Aircraft Scatter now. I noted straight WSPR reflections which de-coded from the North, with the aid of G6AVK I was able to predict the flight path of the reflecting Planes.
Next G6AVK and I beamed SE to the Thames Approach and achieved some straight de-code-able reflections of WSPR.
In the next step I calculated possible Airline routes that could produce straight reflections for our two stations, G6AVK and G3ZJO, the calculations are only valid for these or similarly located stations. A test this week of one route produced some near reflections but nothing that de-coded.
Today I asked G6AVK to beam to Fishguard as per my map.
Within 45 minutes we struck lucky with a plane on the right track and the following de-code.
Only the reflected signal de-coded, the direct path being corrupted by local A/S. The Doppler shift shows only 24Hz which equates to an Aircraft Speed of only 257.68KmH Yet something else to think about.
The Spectran Grab shows some tangential variation which could well corrupt the calculations.
