GRAVES ISS reflections and doppler

I watched the ISS move across the sky to the south using reflections of the GRAVES radar on 143.050 MHz.  Nice classic S curve.  Lots of meteorscatter pings as well. This is today’s curve, started late but managed to catch the tail right until it dipped below the tropo horizon. Line at 12000 is a local birdie, bang on the centre frequency of GRAVES.  Horizontal ticks are at 30 second intervals, time moving upwards.  In the middle minute, the rate of change of doppler was 2.9kHz per minute or 48.3Hz per second.

Max doppler shift was -6150Hz, which means the angle of the track was about 32 degrees to line of sight, which looked about right

This was an earlier capture

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