Radar-guided TOW (millimeter wave-length radar)
U.S. Department of the Army
<a rel="nofollow" class="external text" href="https://babel.hathitrust.org/cgi/imgsrv/download/pdf?id=uiug.30112106711804;orient=0;size=100;seq=84;attachment=0">Radar Guides Missiles Through Smoke</a>, <i>Military Review</i>, March 1981, Vol. 61, No. 3, Page 82