ROTATING monopulse (log Σ/Δ amplitudes, no phase) → absolute bearing, no sign ambiguity · measurement: 100 readings/°, 1 dB detector steps, 3 dB noise (dither) → σ_eff 0.30 dB per 1° reading · single-emitter ACCURACY 0.10° (1σ) · two-emitter RESOLUTION 5.3° for UNEQUAL emitters (WORST case within 5 dB), decided by a 1-SOURCE GOODNESS-OF-FIT of u=Σ−Δ with the single-source null free in bearing (resolved when NO single source explains the scan, CFAR 5%) — below the 40° Σ beamwidth · resolution depends on: background −5→−15 dB ≈ 14°→5.3° · readings 1→100/° ≈ 29°→5.3° (strong; accuracy 0.8°→0.1°) · single 0.73λ full-wave anchor (no spacing re-sim for the Moxon pair) · the −15 dB background fills both this −39 dB Moxon null and the quasi-Yagi's −25 dB null to ~−15 dB, so the deeper null buys ~no extra separability · the SAME u=Σ−Δ scan also reads out an UNEQUAL pair's power ratio: a continuous 2-source least-squares fit with the pair CENTRE left free and the noise floor taken SEPARATELY from the ROTATION MINIMUM (neither assumed known) recovers, at a resolved 18° split, power ratio 5.1±0.3 dB, centre ±0.4°, floor ±0.1 dB
⬗ stack-up: FR4 1.6 mm (εr 4.3) · 1 oz Cu (35 µm) · 2× Moxon rectangle Σ/Δ @ 240 mm (0.73λ)