From top: The first ever MiG-21 R2L radar which HAL manufactured four decades ago under licensed technology from Russia. 2. The Su-30 MKI Avionics Complex in Hyderabad where the RLSU phased array radar -- the fighter's primary sensor -- is assembled. 3. An Rs 15 crore anechoic chamber in Hyderabad where HAL tests the Su-30MKI's RLSU radar to measure the antenna pattern of the radar control system.
Photos Copyright HAL