I wonder what experiment they were running, when the reactor exploded?  I think this location is the best location for building a new nuclear power plant, because the damage has been done to environment, so in case of another accident there won't be destroying good land.

Also Chernobyl-2 large antenna, suggests they were using array antenna for low frequency and large wave length electromagnetic waves.   The minimum size to be seen by EM wave is half its wave length, which suggest they were not able to detect small planes or rockets.  Moreover, they should have had big problem with "ghost target" signature, because of the high power and range.  Are you sure this was a radar site, it looks more like a shortwave radio transmitter station to me than Radar station.

I am fascinated with their antenna design.  Cross elements suggest that they were using circularly polarized wave instead of linearly polarized wave, why?
Circularly polarized wave normally is used for TV transmission. Was this an early attempt to send TV signal to other countries, without the use of satellite?    There are other details that I can not see clearly, but certainly makes a good case study if we have better close up picture of the antenna.  Why these antennas are connected together at the top?