Final answer:
The TPS-75 radar antenna is composed of vertically stacked, slotted waveguide radiators. The specific number of radiators depends on the design of the antenna.
Step-by-step explanation:
The TPS-75 radar antenna is composed of vertically stacked, slotted waveguide radiators. The number of these radiators depends on the specific design of the antenna. Unfortunately, the provided information does not specify a specific number for the TPS-75 radar antenna. However, radar antennas can have multiple radiators arranged in a vertical stack to improve their performance.