Application of Signal Corps Radar to Combat Surveillance

The U. S. Army Signal Research and Development Laboratory has developed several types of radar equipment to fulfill the combat requirements of the Field Army. To aid in obtaining an all-weather continuous surveillance capability, the AN/PPS-4 and AN/TPS-25 ground radar sets were developed. To extend and supplement their coverage of the combat zone, the AN/APS-94 airborne radar was developed. Locating weapons of interest is another important function of combat surveillance. The AN/MPQ-4 mortar locator was developed for this purpose.