144MHz beacon observation from Wellington NSW – 3 aircraft reflections

VK2TP at Wellington has been making observations of aircraft enhancement of the path between my 144MHz beacon and Wellington, an obstructed direct path of 259km. The beacon modulation pattern includes a long steady carrier which permits better observation of the nature of these aircraft enhanced paths.

The screenshot above is of SpectrumLab waterfall display of the receiver output and a view of the position of relevant aircraft.

All three signals show Doppler shift

Two of the aircraft are behind the path, ie a backscatter path.