He is tracking jets using this radar. terrorist activity suspected.
Jokes apart, it could be anything from motion detector, some wireless tx/rx, cctv, or on similar lines. Definitely doesn't look like and windmill thing or water solar panel. But can be some mini solar panel to light a bulb or two in corridor or garden.
Pados wali aunty doing taka jhaki.
(Neighbour aunt spying)
It's a dish. For signal amplification. Could be anything from stb dish, broadband dish to WiFi extender dish. By the angle of it I assume it to be tx/rx from somewhere nearby. I have a similar dish (but different in design) for my broadband.
They are basically trying to get a local network or internet from another location without using wires.
Even my neigbours had them a few years back and it was for internet from a service provider(before fiber days)