BEIJING—Japan has chosen the Lockheed Martin Long Range Discrimination Radar (LRDR) as the sensor for its Aegis Ashore ballistic missile defense program, citing superior performance in comparison with the rival Raytheon SPY-6. The first of the Aegis Ashore batteries will be completed six years after contract signing, the defense ministry says. The LRDR scored higher than the SPY-6 in “basic performance,” such as detection, multi-target handling and continuous operation, ...


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