What sensor allows an analyst to process and exploit ELINT using their DCGS-A systems?

The correct choice for identifying the sensor that enables an analyst to process and exploit Electronic Intelligence (ELINT) using their DCGS-A systems is EMARRS. EMARRS, or Electronic Multisensory Analysis and Reporting System, is specifically designed to gather and analyze electronic signals. It provides crucial capabilities for intercepting and making sense of electronic emissions, which is essential for effective ELINT operations.

In the context of DCGS-A (Distributed Common Ground System-Army), EMARRS is integrated to support the comprehensive exploitation of electronic data, ensuring intelligence personnel can derive actionable insights from various signal sources. This is vital for mission planning and situational awareness.

The other sensors mentioned, like JTT (Joint Tactical Terminal), IFS (Intelligence Functional System), and B-lite (a lightweight sensor system), serve different purposes within the intelligence framework and may not specifically be tailored for ELINT processing like EMARRS is. Thus, EMARRS stands out as the appropriate choice for this question.