The AN/TPQ-37 Firefinder is an electronically-steered, phased array radar which was developed by Raytheon. The radar scans a 90-degree sector for incoming rocket, artillery and mortar fire. Upon detecting a possible incoming round, the system verifies the contact before initiating a track sequence, continuing to search for new targets. The AN/TPQ is an S-band, 15-frequency, long-range radar which can locate ten weapons simultaneously and perform high-burst, datum-plane, and impact registrations. Thanks to its phased array antenna, the Firefinder radar can electronically switch beam positions, thus enabling it to search for new targets while simultaneously tracking previously detected targets.
The AN/TPQ-37 is also capable of first round detection at ranges of 3 to 50 km, dependening on the weapon type. A computer program analyzes the track data and then extrapolates the round’s point of origin. This calculated point of origin is then reported to the operator with map coordinates. Then, system directs effective counterfire against the hostile weapon.
The AN/TPQ-37 RMI (Reliability, Maintainability, Improvement) is an upgraded version of the Firefinder radar which will provide significant improvements over the current AN/TPQ-37 fielded system by providing new, state-of-the-art electronics including an air-cooled modular transmitter and a new radar processor. This new version will also extend the system service life of the AN/TPQ-37 radar and significantly reduce customer life cycle costs, allowing the system to remain the mainstay of long range artillery well into the 21st Century.
Type: mobile phased array radar
Maximum range: 50 km
Azimuth sector: 1600 mils (90 degrees)
Prime power: 115/200 VAC, 400 Hz, 3-phase, 43 kW
Peak transmitted power: 120 kW, min.
Permanent storage for 99 targets
Field exercise mode
Digital data interface