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Northrop Grumman and United Technologies Corp. have recently completed the first flight test of the MS-177 long-range, multi-spectral imaging (MSI) sensor on the RQ-4B Global Hawk Unmanned Aircraft System (UAS). The MS-177 sensor is designed to provide capabilities to not only "find" targets using broad area search and different sensing technologies, but to also fix, track, and assess targets through its agility and multiple sensing modalities.