# Lesson 15 — Electromagnetic Protect

<p class="block-synopsis">Flip the seat back to the radar's side of the duel. A radar must radiate to work, so EP keeps it useful while giving the threat as little as possible — low-probability-of-intercept waveforms, frequency and polarization agility, and side-lobe management.</p>

<div class="block-toc">
  <a class="bt-card bt-reading" href="L15_ElectromagneticProtect_Reading.html">
    <span class="bt-kind">Reading</span>
    <h4>Electromagnetic Protect</h4>
    <p>The EP dilemma, LPI and the $G_p=B\tau$ advantage, frequency and polarization agility, and side-lobe defenses.</p>
  </a>
  <a class="bt-card bt-flashcards" href="L15_Flashcards.html">
    <span class="bt-kind">Flashcards</span>
    <h4>Review deck</h4>
    <p>Key terms and relations from the lesson, in a self-test deck.</p>
  </a>
  <a class="bt-card bt-demo" href="L15_AgilityAndSidelobes_Demo.html">
    <span class="bt-kind">Demo</span>
    <h4>Agility and Side-lobes</h4>
    <p>Hop the carrier to escape a spot jammer and force it into a diluted barrage, then null a side-lobe path.</p>
  </a>
  <a class="bt-card" href="L15_Preflight.html">
    <span class="bt-kind">Pre-flight</span>
    <h4>Pre-flight quiz</h4>
    <p>Pre-class check, due before the lesson. Counts toward your IP grade.</p>
  </a>
</div>
