To fix this, NASA provided the GATV with both optical beacons and a radar transponder. Rather than rely on reflections from a radar set aboard the Gemini, the GATV transponder would transmit a ...

The transponder concept is based on a two-antenna design ensuring a small time delay between reception and re-transmission of the radar signal. Furthermore the complete electronic and both antennas ...

Planes carry transponders that transmit their real-time location. The Alaska plane stopped sharing that data on Thursday.

This groundbreaking deep sea radar has the potential to turn China’s submarines from prey to predator in the game of anti-submarine warfare. If an aircraft is equipped with cutting-edge sensors ...

The aircraft was flying without a flight plan, with its radar transponder switched on and ... were spotted over the Baltic Sea. ・Earlier, it was reported that NATO fighter jets patrolling ...