Air search radars:
<ul><li>TTR (X-BAND)</li>
<li>LOPAR (S-BAND)</li>
<li>ABAR (L-BAND)</li>
<li>HIPAR (L-BAND)</li>
<li>TRR (K<sub>U</sub> BAND)</li></ul>
interface with aircraft on a College Dropout mission
U.S. Army Air Defense Artillery School
1969
<a rel="nofollow" class="external text" href="http://sill-www.army.mil/ada-online/air-defense-trends/_docs/1970/jan.pdf">Air Defense Trends</a>, January 1970, Page 23