Lesson 5 — Doppler & MTI

The Doppler shift a moving target imprints on the return, how moving-target indication notches out stationary clutter, why blind speeds appear, and how it all reads off a range-Doppler map.

Warm-up: L4’s Pulse Timeline demo ends where this lesson begins — sweep the target speed until the phase dial reads an inbound fighter as outbound, then freezes solid at the first blind speed. This lesson explains what the frozen needle costs a radar, and what it costs the radar’s victim.

Reading

Doppler & MTI

Doppler shift, the single-delay MTI canceller and its frequency response, blind speeds, pulse-Doppler, and the range-Doppler map.

Flashcards

Review deck

Key terms and relations from the lesson, in a self-test deck.

Pre-flight

Pre-flight quiz

Five questions to work before class — anyone can be called to the board.

Slides

Lesson slides

The deck we work through in class — an HTML deck you can annotate in the browser, with a print view for saving a PDF.

Demo

Range-Doppler Map

Place a moving target on the map, toggle MTI, and land it on a blind speed to watch it vanish.