The same RF physics from Block 1, turned into a fight. We work the ES→EP→EA arc — first listen to the threat and geolocate it passively, then protect our own use of the spectrum with LPI, agility, and spread spectrum, then attack the enemy's with noise and deception — and close by putting the toolkit to work on the B-21 standoff emitter-geolocation project.
## What you'll learn 1. Read the **radar range equation** as a target list and classify each EW lever as **ES**, **EP**, or **EA**, anchored by the **one-way/two-way** listener's advantage. 2. Walk the **radar warning receiver** end to end, and turn an interleaved pulse stream into named emitters with modes via **PDWs**, **PRI**, and deinterleaving. 3. Measure **angle of arrival** by amplitude comparison and **interferometry**, and resolve the accuracy–ambiguity trade with **multi-baseline** arrays. 4. **Triangulate** two bearings into a fix, explain how the **cut angle** sets the error, and fuse many receivers by **least squares**. 5. Hide a radar that must still radiate with **LPI** ($G_p=B\tau$), **frequency/polarization agility**, and **side-lobe** management. 6. Protect a data link with **DSSS** and **FHSS**, compute **processing gain**, and ride a signal below the noise floor (**LPD**). 7. Classify **noise jamming** (spot/barrage/swept-spot), compute the self-protect **J/S** $\sim R^2$, and find the **burn-through range**. 8. Build believable **DRFM** false returns, walk a gate off the target with **range-gate pull-off**, and name the radar **counters**. ## In this blockThe range equation as a target list, the ES/EP/EA pillars, and the listener's advantage. Reading · Flashcards · Demo · Pre-flight.
Lesson 12The RWR end to end, the PDW, PRI, and deinterleave-then-classify. Reading · Flashcards · Demo · Pre-flight.
Lesson 13Amplitude comparison, the interferometer relation, phase wrap, and multi-baseline. Reading · Flashcards · Demo · Pre-flight.
Lesson 14Lines of position, the cut angle, least-squares fusion, and association before crossing. Reading · Flashcards · Demo · Pre-flight.
Lesson 15The EP dilemma, LPI, frequency and polarization agility, and side-lobe defenses. Reading · Flashcards · Demo · Pre-flight.
Lesson 16DSSS and FHSS, processing gain, J/S relief, and signaling below the noise floor. Reading · Flashcards · Demo · Pre-flight.
Lesson 17The noise-jamming taxonomy, J/S $\sim R^2$, and the burn-through range. Reading · Flashcards · Demo · Pre-flight.
Lesson 18DRFM, range- and velocity-gate pull-off, decoys, and the radar counters. Reading · Flashcards · Demo · Pre-flight.
Lesson 19In-class group work: a B-21 standoff emitter-geolocation analysis from RWR angle-of-arrival measurements.
Lesson 20Results briefings, HW2 due at the start of class, and Quiz 2 in class.
ProjectGroup analysis of passive emitter geolocation from a standoff RWR formation. Handout and starter posted.
HomeworkIndividual walkthrough across the ES/EP/EA arc. Ten numeric questions, due at L20.