You might be interested in the attached picture of aircraft scatter on 10 GHz over a 561 km path to VK3GHZ. The top is the waterfall frequency-time display and the bottom is the amplitude-time display. The aircraft is crossing at about 20 degrees. This is produced by my running a tone at 1270 Hz and watching the result at the other end in Spectrum Lab. It turns out that I can beam to VK3GHZ from inside my lounge room and he can work from inside his carport so we can leave our systems set up and not worry about rain. You can see some weak tropo-scatter which is spread at around 1290 Hz (slightly off frequency because VK3GHZ's IF is not GPS locked). The aircraft signal has an amplitude peak just before it crosses the path as seen by the noise being reduced as the AGC comes into play. The crossing point should be where the Doppler is zero as defined by the tropo signal. I think the small error is because we are dealing with Doppler in both the Horizontal and Vertical planes and the vertical component causes the small offset. You will see that the signal peaked at over 40 dB in 1.6 Hz binwidth - this is equivalent to about +7 dB on the WSJT scale but only lasted at this level for about a second or so. There are a number of other peaks at over 20 dB or -13 dB on the WSJT scale. These would all easily decode on ISCAT-A. The whole process lasts for 2 minutes which is sufficient to complete a QSO on ISCAT set for 15 second period. To date we have completed two QSO's this way.