The large-format Ranger III is a medium- to long-range portable thermal imaging system built around a highly sensitive mid-wave infrared detector. The dual field-of-view telescope allows the system to track vehicles at ranges exceeding 20 km. The Ranger III Multi-Sensor (MS) integrates the Ranger III’s thermal imager with a powerful daylight sensor, GPS, advanced mapping software, and optional laser rangefinder for a precision target geo-location capability. Operators field Ranger III MS as a portable stand-alone system, or integrate it into a network of fixed-site sensors.