The GrACE G-band 199 GHz Radar, based at the Chilbolton Observatory in southern England - with a QO frontend and antenna designed and built by TK - continues to perform well: Peter Huggard of RAL kind sent us the following image of ice clouds, and commented (The x-scale is time in seconds)
"Top of the screen is 8 km, so the returns are from about 4 km to 6.5 km. Not bad for less than 200 mW transmitted power".