ATP-3-09-12 Field Artillery Counterfire and Weapons Locating Radar Operations Download
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AN/TPQ-36 Weapons Locating Radar Systems Characteristics and Employment 26 October 2021 ATP 3-09.12 J-5 this information to predict the object's next location and to send out verification beams to determine if the object has a ballistic trajectory. J-27. If a ballistic trajectory is verified, the software sends out a series of tracking beams. See figure J-1. These beams provide the WLR with the information required to mathematically extrapolate a predicted launch and impact point. The WLR stops sending out tracking beams when the following conditions exist: A solution is computed for the acquisition. Three sequential misses happen. The predicted azimuth for the next track update is outside the left or right limit of the WLR's search sector. The predicted elevation of the next track is above or below the WLR's minimum or maximum search elevation. Figure J-1. AN/TPQ-36 detection, verification, and location methodology Note. Search beam on the screening crest verifies penetration of projectiles. Verification and tracking beams transmit automatically. Computer determines POO and POI. AN/TPQ-36 DETECTION AREA J-28. The possible detection area is a three dimensional space defined by the minimum and maximum range, search sector, and the vertical scan of the WLR. Planning ranges are used for the purposes of this discussion; however, the maximum planning range for the WLR is not an absolute. J-29. A system's actual maximum effective range is the range at which the probability of detection becomes low enough to be unsuitable for planning purposes. Nonetheless, objects may be detected beyond the maximum planning range. Conversely, objects within the planning ranges may not be detected. The planning ranges for the AN/TPQ-36 is 14.5km for artillery, 18km for mortars, and 24km for rockets. AN/TPQ-36 SEARCH SECTOR AND RANGES J-30. The search sector is the area left and right of the WLR's azimuth of search where the WLR can locate targets. The maximum search sector for the AN/TPQ-36 is plus or minus 800 mils from the azimuth of search for a total of 1600 mils. The search sector can be narrowed based on the tactical situation.